A study on calculation method for mechanical impedance of air spring
A study on calculation method for mechanical impedance of air spring
This paper proposes an approximate analytic method of obtaining the mechanical impedance of air spring. The sound pressure distribution in cylindrical air spring is calculated based on the linear air wave theory. The influences of different boundary conditions on the acoustic pressure field distribution in cylindrical air spring are analysed. A 1-order ordinary differential matrix equation for the state vector of revolutionary shells under internal pressure is derived based on the non-moment theory of elastic thin shell. Referring to the transfer matrix method, a kind of expanded homogeneous capacity high precision integration method is introduced to solve the non-homogeneous matrix differential equation. Combined the solved stress field of shell with the calculated sound pressure field in air spring under the displacement harmonic excitation, the approximate analytical expression of the input and transfer mechanical impedance for the air spring can be achieved. The numerical simulation with the Comsol Multiphysics software verifies the correctness of theoretical analysis result.
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Changgeng, Shuai
0c9e0506-46ba-44dc-bd89-f14d83eab5ab
Penghui, Li
441518b0-86fa-4677-b721-35b3f9c0f7f2
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Changgeng, Shuai
0c9e0506-46ba-44dc-bd89-f14d83eab5ab
Penghui, Li
441518b0-86fa-4677-b721-35b3f9c0f7f2
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Changgeng, Shuai, Penghui, Li and Rustighi, Emiliano
(2016)
A study on calculation method for mechanical impedance of air spring.
Journal of Physics: Conference Series, .
(In Press)
Abstract
This paper proposes an approximate analytic method of obtaining the mechanical impedance of air spring. The sound pressure distribution in cylindrical air spring is calculated based on the linear air wave theory. The influences of different boundary conditions on the acoustic pressure field distribution in cylindrical air spring are analysed. A 1-order ordinary differential matrix equation for the state vector of revolutionary shells under internal pressure is derived based on the non-moment theory of elastic thin shell. Referring to the transfer matrix method, a kind of expanded homogeneous capacity high precision integration method is introduced to solve the non-homogeneous matrix differential equation. Combined the solved stress field of shell with the calculated sound pressure field in air spring under the displacement harmonic excitation, the approximate analytical expression of the input and transfer mechanical impedance for the air spring can be achieved. The numerical simulation with the Comsol Multiphysics software verifies the correctness of theoretical analysis result.
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Accepted/In Press date: 12 August 2016
Organisations:
Dynamics Group
Identifiers
Local EPrints ID: 399649
URI: http://eprints.soton.ac.uk/id/eprint/399649
ISSN: 1742-6588
PURE UUID: ae54eb60-eaf2-4c8c-9c1a-298374e08555
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Date deposited: 23 Aug 2016 08:41
Last modified: 15 Mar 2024 05:50
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Contributors
Author:
Shuai Changgeng
Author:
Li Penghui
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