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19 results on '"Chakroun, Ala Eddin"'

1. Modal energetic analysis and dynamic response of worm gear drives with a new developed dynamic model

Author

Chakroun, Ala Eddin, Hammami, Ahmed, De-Juan, Ana, Chaari, Fakher, Fernandez, Alfonso, Viadero, Fernando, and Haddar, Mohamed

Subjects
Dynamic model, Natural frequencies, Natural modes, Worm, Worm gear, Stiffness, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

In order to investigate the behaviour of worm drives, a new dynamic model, composed of two blocks, is established and used to extract numerical results. The tooth deflection of the worm drive, bearings, and wheels inertias are taken into consideration. Newmark solving method is applied to solve motion equations. The state of contact of teeth is what enables these signals to manifest themselves. Modal analysis is developed to investigate the different natural modes of the model. Furthermore, modal energetic analysis is used to understand the distribution of strain and kinetic energies. It is also applied to classify natural models into “teeth modes” and “bearing modes”. These two modes constitute two different frequency bands. The dynamic coefficient is measured simultaneously with the gradual increase of the turning speed of the motor. This allows for the evaluation of the overload of the system.

Published
2021
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2. Numerical and Experimental Vibration Study of an Axial Piston Pump with the Focus on the Hydraulic Circuit Layout

Author

Chakroun, Ala Eddin, Battarra, Mattia, Mucchi, Emiliano, Dalpiaz, Giorgio, Ceccarelli, Marco, Series Editor, Corves, Burkhard, Advisory Editor, Glazunov, Victor, Advisory Editor, Hernández, Alfonso, Advisory Editor, Huang, Tian, Advisory Editor, Jauregui Correa, Juan Carlos, Advisory Editor, Takeda, Yukio, Advisory Editor, Agrawal, Sunil K., Advisory Editor, Quaglia, Giuseppe, editor, Boschetti, Giovanni, editor, and Carbone, Giuseppe, editor

Published
2024
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3. Estimation of Vibrations Levels of a Worm Gear Model with Plastic Wheel

Author

Hammami, Chaima, Chakroun, Ala Eddin, Chaari, Fakher, Hammami, Ahmed, De-Juan, Ana, Fernandez, Alfonso, Viadero, Fernando, Haddar, Mohamed, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Walha, Lassaad, editor, Jarraya, Abdessalem, editor, Djemal, Fathi, editor, Chouchane, Mnaouar, editor, Aifaoui, Nizar, editor, Abdennadher, Moez, editor, and Benamara, Abdelmajid, editor

Published
2023
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4. Influence of the Viscoelasticity on the Dynamic Behavior of a Metallic-Polymer Worm Drive Model

Author

Chakroun, Ala Eddin, Hammami, Chaima, Hammami, Ahmed, De-Juan, Ana, Chaari, Fakher, Fernandez, Alfonso, Viadero, Fernando, Haddar, Mohamed, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Walha, Lassaad, editor, Jarraya, Abdessalem, editor, Djemal, Fathi, editor, Chouchane, Mnaouar, editor, Aifaoui, Nizar, editor, Abdennadher, Moez, editor, and Benamara, Abdelmajid, editor

Published
2023
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6. A Parametric Study to Investigate the Dynamic Behavior of Worm Gear with Plastic Wheel

Author

Hammami, Chaima, Chakroun, Ala Eddin, Hammami, Ahmed, De-Juan, Ana, Chaari, Fakher, Fernandez, Alfonso, Viadero, Fernando, Haddar, Mohamed, Haddar, Mohamed, Series Editor, Bartelmus, Walter, Series Editor, Chaari, Fakher, Series Editor, Zimroz, Radoslaw, Series Editor, Hammami, Ahmed, editor, Heyns, Philippus Stephanus, editor, Schmidt, Stephan, editor, and Abbes, Mohamed Slim, editor

Published
2022
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7. Study of the Stiffness of a Polymer Pinion Tooth in a Polymer-Metallic Spur Gear System

Author

Chakroun, Ala Eddin, Hammami, Chaima, Hammami, Ahmed, De-Juan, Ana, Chaari, Fakher, Fernandez, Alfonso, Viadero, Fernando, Haddar, Mohamed, Haddar, Mohamed, Series Editor, Bartelmus, Walter, Series Editor, Chaari, Fakher, Series Editor, Zimroz, Radoslaw, Series Editor, Hammami, Ahmed, editor, Heyns, Philippus Stephanus, editor, Schmidt, Stephan, editor, and Abbes, Mohamed Slim, editor

Published
2022
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8. Quasi-static Study of Gear Mesh Stiffness of a Polymer-Metallic Spur Gear System

Author

Chakroun, Ala Eddin, Hammami, Chaima, Hammami, Ahmed, De-Juan, Ana, Chaari, Fakher, Fernandez, Alfonso, Viadero, Fernando, Haddar, Mohamed, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, di Mare, Francesca, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Ben Amar, Mounir, editor, Bouguecha, Anas, editor, Ghorbel, Elhem, editor, and El Mahi, Aberrahim, editor

Published
2022
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13. A New Dynamic Model for Worm Drives

Author

Chakroun, Ala Eddin, Hammami, Ahmed, De-Juan, Ana, Chaari, Fakher, Fernandez, Alfonso, Viadero, Fernando, Haddar, Mohamed, Haddar, Mohamed, Series Editor, Bartelmus, Walter, Series Editor, Chaari, Fakher, Series Editor, Zimroz, Radoslaw, Series Editor, Feki, Nabih, editor, Abbes, Mohamed Slim, editor, Taktak, Mohamed, editor, and Amine Ben Souf, Mohamed, editor

Published
2021
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17. Influence of the Hydraulic Circuit Setup on the Dynamic Performance of an Axial Piston Pump by Numerical and Experimental Analysis.

Author

Chakroun, Ala Eddin, Battarra, Mattia, and Mucchi, Emiliano

Subjects
*HYDRAULIC circuits, *RECIPROCATING pumps, *NUMERICAL analysis
Abstract

The hydraulic circuit in hydraulic mechanisms may be the cause of several vibration anomalies. Flexible pipes, in particular, commonly used in test rigs, may be the source of vibration issues due to their relatively low natural frequencies altering the pump noise, vibration, and harshness (NVH) performance. The purpose of this study is to detail a methodology based on lumped parameter modeling and experiments to analyze the circuit NVH behavior. An experimental study is carried out on two pump designs to determine the outlet pressure fluctuation of various test rig configurations. Numerical simulations are also performed to simulate the actual behavior of the hydraulic system considering these different test configurations. The tests are carried out at a chosen frequency range with a hydraulic circuit configuration representing realistic layouts. In these situations, the hydraulic circuit layout can be the source of NVH anomalies. Realistic design solutions are proposed to modify the test rig NVH behavior in order to achieve a flat response throughout the desired working range. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Contribución al estudio del comportamiento estático y dinámico de los engranajes de plástico

Author

Chakroun, Ala Eddin, Juan de Luna, A. M. de, Chaari, Fakher, and Universidad de Cantabria

Subjects
Generalized Maxwell model, Gear mesh stiffness, Polímero, Viscoelasticidad, Tornillo sin fin, Rigidez de la malla del engranaje, Worm drive, Polymer, Vicoelasticity, Modelo de Maxwell generalizado
Abstract

RESUMEN: Inicialmente lleva a cabo un repaso del estado del arte para comprender adecuadamente la literatura sobre engranajes de plástico. A continuación, se propone introducir un modelo dinámico de 14 grados de libertad de un sistema tornillo sinfín – corona sobre el que se encuentran pocas referencias en la bibliografía a pesar de ser uno de los sistemas de engranajes más utilizados en aplicaciones de engranajes de plástico. El siguiente paso es modelar el comportamiento viscoelástico del plástico típicamente utilizado en los engranajes, para lo cual se utiliza un modelo reológico denominado modelo de Maxwell generalizado. Finalmente, se diseña y construye un banco de pruebas que se utiliza para validar el trabajo numérico. ABSTRACT: In the beginning of the PhD research work, a state of the art is made to properly understand the literature on plastic gears. Then, it is proposed to introduce a 14 degrees of freedom dynamic model of a worm drive. The latter is found to be one of the most widely used gearing systems in plastic gearing applications but with minimal mentions in the literature. The next step is to model the viscoelastic behaviour of the plastic typically used in gears. For this purpose, a rheological model called the generalized Maxwell model is used. In the end, a test bench is designed and built. It is therefore used to validate the numerical work.

Published
2022

19. New Approach to Study the Dynamic Performance of Worm Gear Drive Model.

Author

Hammami, Chaima, Chakroun, Ala Eddin, Hammami, Ahmed, Chaari, Fakher, De-Juan, Ana, Fernandez, Alfonso, Viadero, Fernando, and Haddar, Mohamed

Subjects
WORMS, DEGREES of freedom, ELASTIC deformation, PERFORMANCE theory, DYNAMIC models
Abstract

Background: Worm gear sets are used in many applications of the transmission field. These mechanisms have interesting advantages. Despite this, its modelization is still challenging. This is due to its complex geometry. The goal behind this is to have an accurate model that allows improvement of the design of worm gear sets. Purpose: In this context, the paper presents a new mathematical model of a worm gear drive under rotational external excitations. Methods: Dynamic model is defined by fourteen degrees of freedom describing all rotations and translations of worm gear set, AQ1 bearings, a motor and a receiver connected together. First, equations of motion are developed to describe the dynamic behavior. Lagrange formula is, thus, employed. Elastic deformations of meshed teeth are considered. The normal load associated with the meshing is established as function of the model degrees of freedom through the elastic deflection. Second, a numerical simulation is carried out. Newmark Beta method is used to solve equations. Results: Numerical results are presented to discuss the model accuracy. The impact of the variation of friction coefficient and the stiffness of the worm gear is finally studied to discuss the consistency of the new formulation developed through this work. [ABSTRACT FROM AUTHOR]

Published
2023
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