Optimization design of powertrain mounting system considering vibration analysis of multi-excitation

The stiffness of mounting system determines the vibration isolation ability of the transmitted path, which is the key factor that affects the vibration and noise of vehicle. In order to improve the vibration isolation ability of the powertrain mounting system, considering the powertrain of front whe...

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Bibliographic Details
Published in:Advances in mechanical engineering 2018-09, Vol.10 (9), p.168781401878824
Main Authors: Xu, Xiangyang, Su, Chengyun, Dong, Peng, Liu, Yanfang, Wang, Shuhan
Format: Article
Language:English
Subjects:
Authorship
Decoupling
Design optimization
Excitation
Front wheel drive
Genetic algorithms
Mathematical analysis
Methods
Mounting
Noise
Noise reduction
Powertrain
Research methodology
Rigid structures
Rigid-body dynamics
Stiffness
Test procedures
Theory
Vibration analysis
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Summary:The stiffness of mounting system determines the vibration isolation ability of the transmitted path, which is the key factor that affects the vibration and noise of vehicle. In order to improve the vibration isolation ability of the powertrain mounting system, considering the powertrain of front wheel drive car as the research object, the vibration decoupling rate and its corresponding frequency of the powertrain mounting system are analyzed by rigid body dynamics and energy method. The correctness of the calculation program with energy method has been verified by calculated vibration decoupling rate. Based on the genetic algorithm and the fusion robustness analysis, the decoupling rate and modal frequency of the mountings in all directions are considered as the objectives; the stiffness of the three mountings is optimally designed. Through multi-excitation of three methods and vehicle test, the vibration response characteristics and the vibration noise test data of the optimization stiffness are compared and the results shown that the vibration isolation performance has been significantly improved more than 10%. An integrated design method of stiffness optimization design and vibration analysis in vehicle PMS is formed, which has theoretical and practical value, and can reduce vehicle vibration and noise.
ISSN:1687-8132
1687-8140
1687-8140
DOI:10.1177/1687814018788246