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One of the most important steps in the establishment of the capacity curve using pushover analysis is setting up reasonable member nonlinear properties that control the inelastic behavior of reinforced concrete (RC) members. The length of the plastic hinge is one of the major effective parameters in such type of analysis when using lumped plasticity models. In this study, the finite element program ADINA which has the capabilities in defining the non-linear properties through the moment-curvature for element, without the need to define the plastic hinge length, was utilized to obtain the capacity curve for three RC buildings. Also, the capacity curve was obtained using the user-defined non-linear hinge properties in SAP2000 software in which the nonlinear elements are defined by assigning plastic hinges at the ends of RC members. The potential differences between capacity curves obtained using the user-defined hinge properties by SAP2000 and the moment-curvature element in ADINA were investigated. Two four-storey and one eight-storey RC frames with different ductility were considered to represent low to medium rise buildings. The results of analysis showed that the base shear capacity obtained by SAP2000 model for different plastic hinge length values were almost identical and the base shear value obtained by ADINA model was little lower than that obtained by SAP2000 models, the variation in base shear capacity ranged between 3.55% and 6.53%. However, the displacement capacity was significantly affected by the value of the plastic hinge length. [ABSTRACT FROM AUTHOR]

In order to investigate the mechanical behavior of FRP-reactive powder concrete composite tanks with floating tops (FRPCTs) subjected to gravity, twenty-two full-scale FRPCTs were designed with varying parameters for the inner diameter of the storage tank (D) and the thickness of the reactive powder concrete (tc). Based on nonlinear constitutive models and the contact of the materials, and considering tank–liquid coupling, three-dimensional finite element refined models of FRPCTs were established under gravity with ADINA8.5 finite element software, and finite element models of FRPCTs under gravity were verified based on theoretical frequency formulae and existing static tests. Then, the influence of the regularity of different parameters on the equivalent stress, hoop stress, radial stress, and axial stress of the FRPCTs was obtained, and the stress distributions of FRPCTs were clearly described. The results show that the natural frequency of FRPCTs increases gradually with an increase in the height of the tank liquid (Hw); however, the natural frequency of FRPCTs reduces with an increase in D. The equivalent stress, hoop stress, radial stress, and axial stress of the FRP plate and RPC decrease slowly with an increase in tc. The axial stress of the inner RPC increases with an increase in D. The equivalent stress of the inner FRP plate subjected to gravity is distributed in a W shape, the hoop stress, and the axial stress of the FRPCTs are distributed in a U shape, and the radial stress of the inner FRP plate is distributed in an I shape. The maximum displacement occurs in the middle of the FRPCTs, and the bonding between the FRP plate and the concrete is better. Finally, a calculation formula for the variation in the regularity of the tc is developed with different D, and design and construction suggestions for FRPCTs are given, which can provide technical support for the application of the FRPCTs in practical engineering. [ABSTRACT FROM AUTHOR]

Structures located in the water environment undergo additional hydrodynamic forces induced by fluid–structure interaction under earthquakes, which could increase the dynamic responses and affect the seismic performance of underwater structures. Underwater shaking table tests are generally used to verify the seismic performance of structures by using scaled models. Unlike the traditional shaking table without water, it is difficult to design the scaled model as the traditional similitude law requires the designer to change the mass density of water, which is impossible in reality. As a result, the mass density similitude ratio of water mismatches with that of the specimen, which leads to an inconsistent scale of the hydrodynamic forces and the inertia forces of the specimens. A new scaled model design method based on the coordinative similitude law is proposed. This increases the hydrodynamic forces of the model using attached plates to ensure the consistency of the similitude ratio of hydrodynamic forces and inertia forces. A series of numerical simulations are conducted in ADINA (finite element software) to validate the proposed coordinative scaled model design method with attached plates by comparing with the conventional scaled model (CSM) designed based on the artificial mass modeling method and the prototype under unidirectional and bidirectional earthquakes coupled with hydrodynamic forces. The results show that the maximum relative error of dynamic responses could reach 82.80% between the CSM and the prototype; while it is 25% between the coordinative scaled model with attached plates and the prototype. The coordinative scaled model with attached plates can reproduce the responses of the prototype with high accuracy, and thus it is recommended to be used in the underwater shaking table tests. [ABSTRACT FROM AUTHOR]

In order to investigate the mechanical behavior of FRP-reactive powder concrete composite tanks with floating tops (FRPCTs) subjected to gravity, twenty-two full-scale FRPCTs were designed with varying parameters for the inner diameter of the storage tank (D) and the thickness of the reactive powder concrete (tc). Based on nonlinear constitutive models and the contact of the materials, and considering tank–liquid coupling, three-dimensional finite element refined models of FRPCTs were established under gravity with ADINA8.5 finite element software, and finite element models of FRPCTs under gravity were verified based on theoretical frequency formulae and existing static tests. Then, the influence of the regularity of different parameters on the equivalent stress, hoop stress, radial stress, and axial stress of the FRPCTs was obtained, and the stress distributions of FRPCTs were clearly described. The results show that the natural frequency of FRPCTs increases gradually with an increase in the height of the tank liquid (Hw); however, the natural frequency of FRPCTs reduces with an increase in D. The equivalent stress, hoop stress, radial stress, and axial stress of the FRP plate and RPC decrease slowly with an increase in tc. The axial stress of the inner RPC increases with an increase in D. The equivalent stress of the inner FRP plate subjected to gravity is distributed in a W shape, the hoop stress, and the axial stress of the FRPCTs are distributed in a U shape, and the radial stress of the inner FRP plate is distributed in an I shape. The maximum displacement occurs in the middle of the FRPCTs, and the bonding between the FRP plate and the concrete is better. Finally, a calculation formula for the variation in the regularity of the tc is developed with different D, and design and construction suggestions for FRPCTs are given, which can provide technical support for the application of the FRPCTs in practical engineering.

Even though two-phase heat transfer of refrigerants in minichannel heat sinks has been studied extensively, there is still a demand for improvements in overall thermal performance of miniature heat transfer exchangers. Experimental investigation and sophisticated heat transfer calculations with respect to heat transfer devices are still needed. In this work, a time-dependent experimental study of subcooled boiling was carried out for FC-72 flow in a heat sink, comprising of five asymmetrically heated minichannels. The heater surface temperature was continuously monitored by an infrared camera. The boiling heat transfer characteristics were investigated and the effect of the mass flow rate on the heat transfer coefficient was studied. In order to solve the heat transfer problem related to time-dependent flow boiling, two numerical methods, based on the FEM were applied, and based on the Trefftz functions (FEMT) and using the ADINA program. The results achieved with these two calculation methods were explored with an emphasis on the impact of the mass flow rate (range from 5 to 55 kg/h) on the resulting heat transfer coefficient. It was found that, with increasing mass flow, the heat transfer coefficient increased. Good agreement was found between the heat transfer coefficients, determined according to two numerical methods and the simple 1D calculation method. [ABSTRACT FROM AUTHOR]

Static and dynamic behavior of above-ground steel storage oil tanks resting on end bearing piles or stone columns are studied and analyzed using ADINA (2019) program. The studied soil profile is an upper soft clay soil layer, followed by an extended dense sand layer. The main purpose of this research is to explore to what extent stone columns can be used as an effective alternative to concrete piles under steel storage tanks. Therefore, many three-dimensional numerical models are conducted to analyze and study the performance of such tanks in both static and dynamic cases. Ten of the studied cases are steel tanks resting over stone columns with different numbers and properties. On other hand, one model studied the behavior of steel tank resting on large diameter concrete piles. Results indicate that stone columns can be used instead of end bearing piles as long as the computed settlements are safe. In addition, stone columns are behaving better than concrete piles in decreasing of hoop stress in tank shell. It is also noticed that stone columns with high elastic modulus are effective in reducing the sloshing height of the oil surface during earthquakes

Cavitation is common in electrohydraulic servo valves and often adversely affects their performance. This study explores the influence of pre-stage cavitation on the performance of double-nozzle flapper pressure servo valves. The mechanism of cavitation is theoretically studied, a dynamic model of cavitation bubble motion is deduced, and the main factors affecting the development and variation of cavitation are determined. The software ADINA is used to establish a servo valve pre-stage fluid–structure interaction (FSI) model using the finite volume method. Cavitation is introduced to the model to conduct an FSI simulation of the influence of pre-stage cavitation on the performance of double-nozzle flapper pressure servo valves with nozzle diameters of 0.5, 0.55, 0.6, and 0.7 mm. An experiment on the servo valve is carried out to verify the simulation results. The simulation and experiment show that a nozzle diameter that is too small or large weakens the performance of a servo valve, and 0.6 mm is an ideal diameter; asymmetric double nozzles may reduce or improve the performance of a servo valve, and a combination of 0.6 and 0.55 mm nozzles is optimal; pre-stage cavitation influences the performance of a servo valve by changing the size and pressure gain of the dead zone; and excessive cavitation strength decreases or increases the dead zone and increases the pressure gain. [ABSTRACT FROM AUTHOR]

In Egypt, large diameter piles are used in some sites with diameters exceeding 2 m. In some cases, these piles carry foundations of heavy structures and/or large vertical and lateral loads. The analysis and design methodologies of large diameter piles are mainly controlled by the relatively smaller diameter piles, usually ranging between 60 and 120 cm. However, there is a special need for the analysis and design of larger diameter piles (i.e., larger than 120 cm) to assess their actual load carrying capacities. This paper presents numerical modeling of end bearing piles constructed in thick layer of soft to very soft clay underlain by a dense sand layer, typical to large zones in Northern and North Eastern zones in Egypt. The finite element analysis software ADINA (2018) [2] is used to simulate the behavior of the large diameter bored piles. Results showed that increasing the pile diameter cause a corresponding increase in pile capacity. It is also noticed that increasing pile embedded length in the end bearing sand layer has an enormous effect on pile capacity especially for larger diameter piles.

Even though two-phase heat transfer of refrigerants in minichannel heat sinks has been studied extensively, there is still a demand for improvements in overall thermal performance of miniature heat transfer exchangers. Experimental investigation and sophisticated heat transfer calculations with respect to heat transfer devices are still needed. In this work, a time-dependent experimental study of subcooled boiling was carried out for FC-72 flow in a heat sink, comprising of five asymmetrically heated minichannels. The heater surface temperature was continuously monitored by an infrared camera. The boiling heat transfer characteristics were investigated and the effect of the mass flow rate on the heat transfer coefficient was studied. In order to solve the heat transfer problem related to time-dependent flow boiling, two numerical methods, based on the FEM were applied, and based on the Trefftz functions (FEMT) and using the ADINA program. The results achieved with these two calculation methods were explored with an emphasis on the impact of the mass flow rate (range from 5 to 55 kg/h) on the resulting heat transfer coefficient. It was found that, with increasing mass flow, the heat transfer coefficient increased. Good agreement was found between the heat transfer coefficients, determined according to two numerical methods and the simple 1D calculation method.

This paper presents an analysis of the redistribution of stresses and displacements in numerical models of various shapes of glass connectors. Two states of dynamic wind gusts were analyzed: the maximum value of suction and the maximum value of wind pressure. For the sake of simplicity, wind gusts were assumed periodically as a sinusoidal function. The model adopts a rectangular glass plate that transmits wind pressure and suction through the point fixed glass connectors. Therefore, single-arm cross connectors were not only subjected to bending stress, but also to torsion. Four different shapes of connectors were analyzed. In the first part of the numerical analysis, T-shaped and C-shaped cross-sections were adopted, and in the next part, both connectors were modified by adding fillet welds to the models. The dynamic numerical analysis was performed using the finite element method in the ADINA program. [ABSTRACT FROM AUTHOR]

En la realidad de las mujeres mayores de sesenta y cinco años víctimas de violencia de género, interseccionan una serie de aspectos psicosociales que inciden en su ocultación y perpetuación. Esta circunstancia conforma los aspectos diferenciales de este colectivo que deben ser tenidos en cuenta para su abordaje. La inclusión de la variable edad y el principio de interseccionalidad en el análisis de la violencia de género en el ámbito de pareja son fundamentales para comprender la invisibilidad de la violencia que sufren las mujeres mayores. Este artículo muestra los avances realizados en torno a la visibilización de los aspectos y circunstancias que interseccionan en este grupo de mujeres, tales como la identidad, las dependencias, el rol social actual de la mujer mayor, la ética del cuidado, el edadismo o la confluencia con otras violencias, así como las relaciones que operan entre ellos, los cuales generan mayor vulnerabilidad. Por último, se perfilan los retos que de los profesionales y la sociedad en su conjunto para aplicar el principio de interseccionalidad como herramienta de protección. [ABSTRACT FROM AUTHOR]

Static and dynamic behavior of above-ground steel storage oil tanks resting on end bearing piles or stone columns are studied and analyzed using ADINA (2019) program. The studied soil profile is an upper soft clay soil layer, followed by an extended dense sand layer. The main purpose of this research is to explore to what extent stone columns can be used as an effective alternative to concrete piles under steel storage tanks. Therefore, many three-dimensional numerical models are conducted to analyze and study the performance of such tanks in both static and dynamic cases. Ten of the studied cases are steel tanks resting over stone columns with different numbers and properties. On other hand, one model studied the behavior of steel tank resting on large diameter concrete piles. Results indicate that stone columns can be used instead of end bearing piles as long as the computed settlements are safe. In addition, stone columns are behaving better than concrete piles in decreasing of hoop stress in tank shell. It is also noticed that stone columns with high elastic modulus are effective in reducing the sloshing height of the oil surface during earthquakes. [ABSTRACT FROM AUTHOR]

Continuous fiber fabrication technology, developed by Markforged and used in MarkTwo printers, allows using of reinforcing fibers, which improve mechanical properties of produced parts. The technology enables choosing of two fiber deposition strategies: isotropic fiber fill and concentric fiber fill. With the isotropic fiber fill, there is an option to set up various fiber angles in each layer. The article is focused on stress distribution analysis using FEM in a matrix and individual reinforcing fibers of specimens loaded to uniaxial tension. Main observed parameters are stresses in matrix and fiber and usage of the reinforcing material.

The stress distribution in specimens designed for the tensile testing is evaluated in the article. The reinforcement consists of long fibers that copy the outer contour of the specimen. The fibers are inserted within the curvature at the edge of the specimen with the neck. The stress distribution in fibers and matrix of dogbone specimen and specimen of rectangular shape is analyzed and compared. The analysis of stress state is analyzed in FEM software ADINA. Long fibers deposited in specimen were modeled using rebar elements.

A three-dimensional multitransmitting formula is developed in ADINA to simulate the input of seismic waves and the scattering of infinite domains at the same time, consistent with the progress of the explicit finite element method of lumped mass. A three-dimensional cube model is built, and a delta pulse wave is input to compare the simulation results with the analytical solutions. The simulation results show that the peak error is 0.2% of the input wave, which meets the requirements of the usual numerical simulation. This method has a certain efficiency advantage in site effect analyses of fine models for localized fields. A velocity structure model of the Yuxi Basin is built, and the associated basin effect is studied by numerical simulation. The distribution of the focusing effect is related to the structure of the narrow east-west and wide north-south features in the Yuxi Basin, and the edge effect is related to the slope of the basin base. A distribution map is given of the amplification effect of ground motion in the basin. [ABSTRACT FROM AUTHOR]

In this paper, the ADINA finite element software was used for numerical investigation of laminar and non-Newtonian flow through a blood artery with consecutive stenosis. For modeling the non-Newtonian behavior of blood, six models were used, namely, Carreau, Carreau-Yasuda, modified Casson, Power law, generalized power law, and Walburn-Schneck. The results show that for all non-Newtonian models as well as the Newtonian model, the velocity of blood flow in the second stenosis is greater than the first stenosis. Also, up to 4D back of second stenosis, a reverse flow area is formed that causes the spread of disease and the formation of new plaque. As a general conclusion, it can be stated that due to the smaller values obtained from the power law and Walburn-Schneck models, as compared with the other models, for fluid velocity and wall shear stress, these two models must be applied with caution.

The paper deals with a construction design and structural analysis of the rack system which will be used for storage of steel tubes of pressure pipeline for fodder mixtures transportation in agricultural company. Structure of the designed equipment is made by the welding of steel parts and consists of the main framework and four pull-out racks on both sides. Racks move by means of human power through a rotating crank. Every individual pull-out racks is able to carries pipes of various dimensions, both length and diameter with total weight up to 3 tons with respect to customer requests. Since it is a prototype’s structure, we have designed main dimensions of it, material and technology for production and performed also structural analyses as the integral part of every engineering design. Structural analyses were conducted by means of numeric procedure known as finite element method. With respect to the used steel profiles shell elements were used for FE model. Analyses were performed for maximal loading cases in order to identify the level of safety in the most exposed locations of the structure.

To study the sloshing effect of 16 x 104m³ LNG storage tanks under the near-fault ground motions and compared the responses of tanks under near fault ground motions and common ground motions, 5 near fault ground motions with different pulse period and 4 common ground motions on site II were selected as earthquake excitation, three-dimensional tank model was established by using the finite element software ADINA, and the seismic response was carried out by the dynamic time integration method. The results are as followings: the seismic responses of storage tanks under the near fault ground motions is larger than common ground motions. Near fault ground motions will cause more severe sloshing, while the pulse period is the main influencing factor. The severe sloshing of the liquid has a great impact on the inner tank wall and dome, which leads to the sudden increase of the stress and acceleration on the upper part of the tank wall, the sudden change of the dynamic hydraulic pressure of the upper liquid, the increase of the effective stress of the dome. Therefore, the anti-sloshing device should be installed in the design and construction of the large LNG storage tanks which in the fault zone to avoid the leakage and damage of the storage tanks due to excessive sloshing. [ABSTRACT FROM AUTHOR]

A novel hollow type of traveling wave rotary ultrasonic motor is proposed, optimized, fabricated, and tested in this study. Unlike conventional ultrasonic motors, this novel ultrasonic motor adopts a bran-new preloading method that preload is applied from the bottom of the stator through a wave spring, which can not only enhance the anti-overload ability but also extend the working life of the motor. According to this motor, a three-dimensional finite element model has been built by the commercial finite element software ADINA. In terms of the friction material and the preload, a detailed further optimization procedure is given after the initial design. Finally, the appropriate size and location of the friction layer and a proper preload for this motor have been determined. Almost all of the motor's mechanical capacities, such as rotational speed, torque, and deformation, can be obtained by simulations in ADINA, which have good agreement with experimental results. [ABSTRACT FROM AUTHOR]

In this paper the comparative analysis of obtained stress and displacements results from two different FEM programs – Robot Structural Analysis and ADINA was performed. As a subject of the analysis, the numerical model of the arch footbridge in steel construction was adopted.

Nowadays, piezoelectric actuators are widely used, but are rarely applied in high overload environments due to th difficulty implementing them. Traveling wave rotary ultrasonic motors (TRUMs) have the characteristics of variable structure and are insensitive to overload, endowing them with the potential ability of high overload resistance. In this study, four TRUMs with different rotor structures are designed to work under the high-impact acceleration of 10,000 g through modifying the rotors with a designed slotted disc spring. The dynamics model is established, the impact process is simulated, and the results are analyzed successively. The high-impact test, deformation measurement and performance test of the motors are carried out to verify the modification. The results show that performance of the TRUMs with a disc spring declines much less than those without a disc spring after the high-impact test. The TRUM-4 with the modified rotor and disc spring has the best performance, the speed of which decreased only 1.6% at the torque of 0.15 N m, and it is considered to be capable of withstanding the high acceleration of 10,000 g. This work is significance for guiding the ultrasonic motors' optimization to expand their application in high-overload environments. [ABSTRACT FROM AUTHOR]

A nonlinear finite element analysis of steel fibre-reinforced concrete beams subjected to static loading was explored using ADINA software. A predefined 3D model of concrete beam of dimension 100 mm×100 mm×500 mm was prepared using the smeared crack approach to fracture of concrete in the mode I; this model simulates a nonlinear response in tension. Stress redistribution was performed by the equilibrium iterations process. Both stresses and displacements occurring at different node locations of the element were carefully examined. In addition, the results of laboratory experiments conducted on concrete beams with a fibre content of 60 kg/m3 based on volume (that is: 0.75% and 1% by volume of concrete) were compared to the analytical results in order to ascertain the consistency of the results. It was realized that the interfacial bond between the concrete and the fibres has a significant effect on the overall performance of the strengthened members.

In this paper numerical analysis considering the influence of dynamical force acting on wall made of concrete blocks with rubber inserts is presented. By examining the stress values on front and back surface of the analysed wall structure model, the effectiveness of proposed solution can be measured comparing to the wall made of concrete blocks without rubber inserts. Complete numerical analysis was performed in ADINA program.

Artikulu honen helburua Bermeoko berbaldiaren fonemen eta alofonoen frekuentziak aztertzea izan da, aldagai sozial bietan: adina eta generoa. Corpusaren materialak jasotzeko testu gidatuen teknika erabili dugu, kasu honetan komiki baten bidez, eta horrela bat-bateko testu sasiaskeak lortzen ditugu. Alde batetik, artikuluaren lehen atalak bokalak, diptongoak eta kontsonanteak aztertzen dira; eta hiru mailatako azterketa egin nahi izan dugu: azterketa kuantitatiboa, fonetikoa eta fonologikoa. Beste alde batetik, azken ataletan, ezaugarri batzuk aztertzeko datu berriak aurkezten dira eta lan batzuetarako proposamenak eta iradokizunak azaltzen ditugu laburki.

Highlights • Establishing a complete 3D FE model to study the TRUMs. • It can help to know the motor's mechanical capacity before prototype manufacture. • The actual contact mechanism between stator and rotor is reflected accurately. • Torsional deformation of the rotor during rotation can be obtained. • Simulations can facilitate the stress analyses to avoid the failure of USMs. • Providing a powerful tool for structure design and performance prediction of USMs. Abstract To evaluate the response and output performance of an assembled and complete ultrasonic motor, a 3D finite element model has been proposed by a commercial finite element software ADINA. The simulated results of the output performance can be obtained, which are in good agreement with the available experimental data. Therefore, it is convenient to know the mechanical capacity of the motor before prototype manufacture. Moreover, the radial, circumferential and axial displacements of the contact nodes are acquired to simulate the real elliptical motions of the stator. Without assuming that the rotor behaves as a rigid body, the actual contact mechanism between the stator and rotor is reflected accurately. The simulation shows the distinct stress concentration issue of the motor, which can facilitate the stress analyses to avoid the failure of the motor. This study provides a powerful tool for the structure design and performance prediction of the ultrasonic motor. [ABSTRACT FROM AUTHOR]

The submitted paper is devoted to the numerical modeling of the dynamic effects of moving vehicles on concrete pavements. The finite element method, namely the ADINA program, is used to model the problem. To solve the task, it is necessary to create a vehicle and a road computational models. The vehicle model is spacious and corresponds to a heavy truck of the Tatra type. The so-called single-layer road model on an elastic Winkler foundation is used. Concrete pavements are modeled using shell or solid elements. The output of the solution is the time course of the dynamic deflections at the individual points of the slab and internal forces and the stress states in the concrete slab at the individual time points of the solution. The calculation results for each computational model are compared to each other. [ABSTRACT FROM AUTHOR]

This paper presents numerical analysis concerning a rubber-concrete composite which can be considered as a structural element designed to form walls. Structural elements that carry the compressive load have a rubber with a specific shape embedded during the technological process. Therefore, the prefabricated block offers an additional damping property of a mechanical wave resulting from the dynamic load. The numerical analysis using the ADINA software revealed significant mechanical wave damping in the composite analysed in the study for different types of dynamic load.

Computer program ADINA is used for pressure analysis on a model of underground opening, semi-circular in shape, where there are the layers of lignite, and conducted pressure analysis, before, during and after the setting of three and five anchors. Theory on pressure distribution for secondary and tertiary pressure condition in the roof and board sides of the opening by setting anchors has been proven. In order to check the result, test of removing anchors from the roof and board sides of the opening was done. Testing and research, conducted at the level of obtained results, show the efficiency of setting underground opening using the anchors where there are multilayered deposits of lignite. The research results, provided in this paper, can be also used for other underground openings containing multilayered deposits.

Vehicle excitation by passing over pavement unevenness represents the actual problem which is solved on many departments in this time. The numerical methods are mainly applied for the solutions of the interaction of similar systems. The Finite Element Method (FEM) is the best-known and widely used. It provides appropriate accuracy. In this article, commercial computer software ADINA based on the FEM is used to solve kinematic excitation of vehicle. The 2D model of vehicle which represents real type of lorry T-815 is excited by simulation of passage across obstacle. There are compared dynamic responses of the vehicle on the kinematic excitation at different speeds.

With the rapid development of the petrochemical industry, the number of largescale oil storage tanks has increased significantly, and many storage tanks are located in potential seismic regions. It is very necessary to analyze seismic response of oil storage tanks since their damage in an earthquake can lead to serious disasters and losses. In this paper, three models of vertical cylindrical oil storage tank in different sizes, which are commonly used in practical engineering are established. The dynamic characteristics, sloshing wave height and hydrodynamic pressure of the oil tank considering the liquid-structure coupling effect are analyzed by using ADINA finite element software, which are compared with the result of the standard method. The close numerical values of both results have verified the correctness and reliability of finite element model. The analytic results show that liquid sloshing wave height is basically in direct proportion to ground motion peak acceleration, the standard method of portion sloshing wave height calculation is not conservative. The hydrodynamic pressure generated by liquid sloshing caused by ground motion is not negligible compared with the hydrostatic pressure. The tank radius and oil height have a significant effect on the numerical value of hydrodynamic pressure. The ratio of the hydrodynamic pressure and hydrostatic pressure, which is named hydraulic pressure increase coefficients, is related to the height, which given by the GB 50341-2014 code in China have a high reliability. The seismic performances of tank wall near the bottom needs to be enhanced and improved in the seismic design of the oil tank. [ABSTRACT FROM AUTHOR]

The paper deals with a construction design and structural analysis of the rack system which will be used for storage of steel tubes of pressure pipeline for fodder mixtures transportation in agricultural company. Structure of the designed equipment is made by the welding of steel parts and consists of the main framework and four pull-out racks on both sides. Racks move by means of human power through a rotating crank. Every individual pull-out racks is able to carries pipes of various dimensions, both length and diameter with total weight up to 3 tons with respect to customer requests. Since it is a prototype's structure, we have designed main dimensions of it, material and technology for production and performed also structural analyses as the integral part of every engineering design. Structural analyses were conducted by means of numeric procedure known as finite element method. With respect to the used steel profiles shell elements were used for FE model. Analyses were performed for maximal loading cases in order to identify the level of safety in the most exposed locations of the structure. [ABSTRACT FROM AUTHOR]

In order to explore the law of stress-strain for the U-shaped steel mold prefabricated concrete channel, numerical simulation was carried out under different thickness, longitudinal stiffener and transverse stiffeners with D60 U-shaped steel mold as research object by ADINA software that used for different thickness, different longitudinal stiffener numerical simulation of different ribs and transverse stiffeners of steel mold. The results indicate that the displacement of the steel mold on the straight linear segments is the maximum, the arc segments come second and the straight line connecting segments and arc segments connecting segment are the minimum. Stress in a straight line connecting segment and arcs connecting segment of steel model are the maximum, the straight linear segment and arc segments are lesser and the degree of influence of the thickness of the steel mold is larger than the number of longitudinal stiffener and the degree of influence of the number of longitudinal stiffener is larger than the number of transverse stiffener of steel model. Within the allowable deformation range, the appropriate thickness of the prefabricated concrete lining steel mold channel is 8 mm-10 mm and the appropriate number of longitudinal stiffeners is 3 to 4 and the appropriate number of transverse stiffeners is 2 (1 transverse stiffener for each straight linear segment and arc segment). [ABSTRACT FROM AUTHOR]

In this paper, the ADINA finite element software was used for numerical investigation of laminar and non-Newtonian flow through a blood artery with consecutive stenosis. For modeling the non-Newtonian behavior of blood, six models were used, namely, Carreau, Carreau-Yasuda, modified Casson, Power law, generalized power law, and Walburn-Schneck. The results show that for all non-Newtonian models as well as the Newtonian model, the velocity of blood flow in the second stenosis is greater than the first stenosis. Also, up to 4D back of second stenosis, a reverse flow area is formed that causes the spread of disease and the formation of new plaque. As a general conclusion, it can be stated that due to the smaller values obtained from the power law and Walburn-Schneck models, as compared with the other models, for fluid velocity and wall shear stress, these two models must be applied with caution. [ABSTRACT FROM AUTHOR]

This study presents the numerical comparative analysis of the point connector and its modification used for fixation of glass façades in terms of the obtained values of stresses and displacements. Since the most popular components of glass façades are square, rectangular or triangular, it was adopted that the load to the connectors is transferred from a rectangular façade component. Furthermore, the dynamic effect of wind gusts on façades was also assumed, with both wind pressure and wind suction. Adoption of the rectangular component of the glass façade leads to an unfavourable load distribution observed in the location of the connection, with the connector additionally twisted with respect to its own symmetry axis. ADINA software, based entirely on the finite elements method, was used for numerical analysis. The examinations allowed for evaluation of how the modifications introduced into the referential model reduce values of the obtained stresses and displacements. [ABSTRACT FROM AUTHOR]

In this paper the comparative analysis of obtained stress and displacements results from two different FEM programs - Robot Structural Analysis and ADINA was performed. As a subject of the analysis, the numerical model of the arch footbridge in steel construction was adopted. [ABSTRACT FROM AUTHOR]

In this paper, we report our study on a numerical fluid-structure interaction problem originally presented by Mok et al. (2001) in two dimensions and later studied in three dimensions by Valdés Vazquez (2007), Lombardi (2012), and Trimarchi (2012). We focus on a 3D test case in which we evaluated the sensitivity of several input parameters on the fluid and structural results. In particular, this analysis provides a starting point from which we can look deeper into specific aspects of these simulations and analyze more realistic cases, e.g., in sails design. In this study, using the commercial software ADINA, we addressed a well-known unsteadiness problem comprising a square box representing the fluid domain with a flexible bottom modeled with structural shell elements. We compared data from previously published work whose authors used the same numerical approach, i.e., a partitioned approach coupling a finite volume solver (for the fluid domain) and a finite element solver (for the solid domain). Specifically, we established several benchmarks and made comparisons with respect to fluid and solid meshes, structural element types, and structural damping, as well as solution algorithms. Moreover, we compared our method with a monolithic finite element solution method. Our comparisons of new and old results provide an outline of best practices for such simulations. [ABSTRACT FROM AUTHOR]

This paper presents a computational algorithm allowing the efficient use of high-performance computing resources to solve nonlinear problems of continuum mechanics using FEM. The algorithm is suitable for solving static problems and tasks of estimating lifetime of structures in cases where the load is defined by the load spectrum. The complexity of the problem increases significantly in the case of nonlinear problems. The principle of the stress superposition cannot be used in that case. For each loading mode a separate FE analysis must be made. A quick and efficient procedure for evaluating the results of mentioned analysis for the static calculation as well as for the estimated life calculation is also presented in this paper. In the presented examples the contact of bodies is used as a source of nonlinearity. The size, shape or position of the contact area is not possible to estimate in contact of bodies. These types of problems are thus highly nonlinear. Programs for the presented algorithms are processed in the program package OCTAVE and calculations using FEM are made in the software ADINA.

The goal of the paper is the numerical study of the original hysteresis computational material models and their application in beam's bending theory. The paper presents the chosen differential material models and approaches based on step by step solution respecting the elastic and plastic conditions. In the centre of authors´ interest is the numerical method study of the plastic zones identification or study of residual stresses distribution in the beam's cross-section. The results obtained from new MATLAB's programs are compared with FEM models in ADINA.