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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: The traditional semi-active mount has strong nonlinearity, so it is difficult to explore its dynamic characteristics.In order to solve the difficult problem of parameter identification in the process of modeling, a modeling method based on fluid-structure coupling finite element method and lumped parameter model was used to study the motion characteristics of the semi-active suspension in theory, simulation and experiment.Firstly, the mechanical model was constructed according to the basic principle of mounting, and the modeling was completed in AMESim platform. Secondly, the key parameters such as rubber main spring, volume stiffness of two fluid chambers, fluid inertia coefficient and damping coefficient were extracted by fluid structure coupling finite element method. Finally, the parameters were brought into the lumped parameter model to complete the simulation, and the accuracy of the simulation results was verified by building a test platform. The dynamic characteristics of the mounting system were analyzed by plotting the dynamic stiffness and damping angle curves in soft and hard modes. The test results show that the modeling method of fluid structure coupling lumped parameters has high accuracy. The maximum errors of dynamic stiffness and damping angle after simulation and test are respectively 6.2% and 7.4%, which meet the engineering error requirements. The results show that this method based on fluid-structure coupling finite element method and lumped parameter model can not only be used to analyze the influence of mount parameters on dynamic stiffness and damping angle, but also provide a modeling basis for engine mount optimization,save research and development costs and improve research and development efficiency.
Key words: semi-active mount; motion characteristic; fluid structure coupling; lumped parameter modal; dynamic stiffness; damping angle
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