6 results on '"Yu, Anbin"'
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2. Theoretical and experimental study on coupling characteristics of double-sided immersion cylindrical shells with arbitrary boundary.
- Author
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Yu, Anbin, Zhao, Yinglong, and Jin, Qeqing
- Subjects
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CYLINDRICAL shells , *FREQUENCIES of oscillating systems , *FOURIER series , *SOIL vibration , *THEORY of wave motion , *SEPARATION of variables - Abstract
Based on the wave propagation method and improved Fourier series, the coupled vibration model of double-sided immersion (DI) cylindrical shell under arbitrary boundary conditions is established, and its coupled vibration characteristics are solved. The coupling vibration characteristic experiment of a cylindrical shell under the DI condition is carried out for the first time. The calculated natural frequency and vibration acceleration are compared with the model experimental results, which not only verifies the reliability of the theoretical method but also proves the effectiveness of the experimental results. Finally, the coupled vibration characteristics of DI cylindrical shells with arbitrary boundary conditions are analyzed. The results show that the natural frequency and acceleration of underwater immersed cylindrical shells are consistent with those of liquid filling cylindrical shells. The natural frequency and peak acceleration of the single-sided submerged cylindrical shell are greater than that of the DI cylindrical shell. The spring stiffness at both ends of the DI cylindrical shell can be divided into three sections: free boundary, elastic boundary, and rigid boundary. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
3. Vibration transmission analyses of double-layer cylindrical shell with fully immersed elastic connections through experimental and analytical approaches.
- Author
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Yu, Anbin, Zhao, Yinglong, Chen, Qihang, liu, Jian, Zhou, Zhiwei, and Cao, Xiaofei
- Subjects
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CYLINDRICAL shells , *TRANSMISSION of sound , *VIBRATION tests , *ELASTIC plates & shells , *VIBRATION isolation , *THEORY of wave motion - Abstract
• Vibration transmission mechanisms of the shell with immersed elastic connections are studied. • The forced vibration test is conducted on the double-layer shell with six immersed isolators. • An analytical approach is proposed to predict the vibration response of the double-layer shell. • The vibration test provides benchmark experimental results for future studies. • The energy transmission is quantitatively partitioned with respect to elastic connection stiffness. This paper investigates vibration transmission characteristics of the double-layer cylindrical shell with fully immersed elastic connections through experimental and analytical approaches. A test sample of the double-layer cylindrical shell connected by six vibration isolators is firstly manufactured and a forced vibration test is done with fully immersed interlayer. Meanwhile, a novel analytical approach is developed to calculate vibration responses of an unequal double-layer cylindrical shell with fully immersed elastic connections. The substructure receptance method and wave propagation method are combined in the coupling theoretical model. Springs are utilized to simulate elastic connections, that are considered as substructures. By comparing the achieved analytical and experimental vibration responses, good agreements are gained and the two approaches are demonstrated. Then the transmission characteristics are gradually analyzed with respect to the double-layer shell with elastic connections, double-layer shell with interlayer fluid and double-layer shell with fully immersed elastic connections. It is found that the interlayer water between the inner and outer shells plays a "short-circuit" role in vibration transmission, which greatly reduces the isolation performance of vibration isolators. Nevertheless, the fully immersed isolators with small stiffness still have the non-ignorable vibration isolation effect compared with the case of rigid connection. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Study on vibration transfer characteristics of liquid filled double-walled cylindrical shells with elastic connection.
- Author
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Yu, Anbin, Zhao, Yinglong, and Chen, Meixia
- Subjects
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ELASTIC plates & shells , *CYLINDRICAL shells , *DOUBLE walled carbon nanotubes , *FINITE element method , *VIBRATION isolation , *SHORT circuits - Abstract
In order to study the vibration isolation characteristics in water, based on the Flügge theory, a double-walled cylindrical shell model with spring connection is established using the wave propagation method. The fluid inside the inner shell is considered in the model. The reliability of the theoretical method is verified by comparing the calculation results of the mean square velocity with those of the finite element method. The effects of spring stiffness, spring number, fluid load, and inter-shell fluid thickness on vibration transmission of inner and outer shells are studied. The results show that the fluid loading effect of the water medium inside the inner shell can act on the inner shell and the outer shell simultaneously, while the fluid loading effect of the outboard fluid only acts on the outer shell. Under the condition of keeping the total spring stiffness unchanged, increasing the number of springs can reduce the vibration transmission from the inner shell to the outer shell, especially the vibration transmission from the inner shell to the outer shell at low frequencies. The "vibration short circuit" effect easily occurs in the inter-shell water, which is independent of the thickness of inter-shell water. When the elastic connection stiffness is small, the inter-shell water plays a leading role in vibration transmission in the whole frequency range. When the stiffness of elastic connection is large, the inter-shell water plays a leading role in vibration transmission at low frequencies, while the elastic connection plays a leading role in vibration transmission at high frequencies. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
5. Study on the Coupling Frequency of Double-Sided Submerged Ring-Stiffened Cylindrical Shells.
- Author
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Yu, Anbin, Zhao, Yinglong, Wang, Youqian, and Zhang, Ben
- Subjects
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CYLINDRICAL shells , *ACOUSTIC vibrations , *HYDROSTATIC pressure , *ACOUSTIC couplers , *FREE surfaces - Abstract
Based on the Flügge theory and orthotropic theory, the acoustic vibration coupling model of ring-stiffened cylindrical shell is established by using the wave propagation method and virtual source method. And the effects of water immersion on both sides, free surface, and hydrostatic pressure on the cylindrical shell are considered in the coupling model. Muller three-point iterative method is used to solve the coupling frequency. The calculation results of degradation theory are compared with COMSOL's calculation results and experimental results, respectively, which verifies the reliability of the theoretical method. Finally, the influence of fluid load, ring rib parameters, boundary conditions, hydrostatic pressure, and free surface on the coupled vibration of ring-stiffened cylindrical shell is analyzed by an example. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
6. Analysis of electromagnetic vibration of submerged tubular linear motors based on wave propagation approach.
- Author
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Guo, Guoqiang, Zhao, Yinglong, and Yu, Anbin
- Subjects
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THEORY of wave motion , *LINEAR induction motors , *ELECTROMAGNETIC forces , *ELECTROMAGNETIC pulses , *STATIC pressure , *FINITE element method , *CYLINDRICAL shells , *SUBMERGED structures - Abstract
This paper presents the properties of electromagnetic vibration in a submerged tubular linear induction motor through an analytical model. Firstly, the spatial and temporal characteristics of electromagnetic force acting in the stator are analyzed. Subsequently, based on the wave propagation approach, an analytical model is established to calculate the vibration response of the stator, which is simplified as a finite-length cylindrical shell. The accuracy of the proposed model is verified by comparing natural frequencies of axial breathing modes and frequency response with the finite element method. Finally, the effects of the position of electromagnetic force, the spatial distribution of electromagnetic force, radial static pressure and structure parameters on vibration response are investigated and discussed. Some conclusions are outlined, which is of great importance to reduce electromagnetic vibrations by optimizing the structure design of the motor. • An analytical model is established to calculate the vibration response of the stator, the accuracy of which is verified by comparing natural frequencies of axial breathing modes and frequency response with the finite element method. • The effects of the position of electromagnetic force, the spatial distribution of electromagnetic force, radial static pressure and structure parameters on vibration response are investigated and discussed. • Some key conclusions are outlined, which is of great importance to reduce electromagnetic vibrations by optimizing the design of the motor body. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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