摘要
针对如何高效准确地通过有限元分析方法获取减振器节流阀片组刚度特性的问题,采用有限元分析方法对节流阀片组建立考虑流固耦合效应的流固耦合模型和不考虑流固耦合效应的结构模型。对模型进行求解,提取计算结果中节流阀阀片组的刚度特性曲线,发现:当节流阀阀片和阀座不存在开槽且阀片变形较小时,可建立结构模型求解节流阀片组刚度特性,当变形较大时,则需建立流固耦合模型求解阀片组刚度;当节流阀或阀座存在开槽时,需建立流固耦合模型进行求解;对流固耦合模型中的流体施加不同的速度载荷,发现:高速激励且阀片变形较大时,需建立流固耦合模型求解节流阀阀片组刚度特性,同时发现:阀片组刚度特性与阀片变形速度有关且阀片变形速度越大,阀片组刚度特性越弱。建立某型双筒充气阀片式液压减振器的性能仿真模型,通过仿真结果与试验结果对比可知,以上所得结论是正确可信的。
To efficiently and accurately obtain the stiffness characteristics of throttle slice groups of shock absorbers, the finite element analysis models considering and without considering the fluid-structure coupling effect were established respectively by means of commercial finite element software. By solving the models and extracting the stiffness characteristics of the throttle slices, it was found that when there is no slot in the throttle slices and valve seat and the valve deformation is small, the fluid-structure coupling effect does not need to be considered in solving for the stiffness characteristics of the throttle slices; otherwise, the fluid-structure coupling effect must be considered. Applying different fluid velocity to the fluid- structure coupling model, it was found that in the condition of rapid incentive and large deformation, the fluid-structure interaction should be considered in model establishment. The greater speed of the throttle slice deformation will cause the weaker stiffness performance of the throttle slices. To test and verify the reliability of the above conclusions, the performance simulation model of a type of gas-precharged dual-sleeve shock absorber was established. By comparing the simulation results with test results, the conclusions above were proved to be correct and credible.
出处
《噪声与振动控制》
CSCD
2016年第1期38-44,共7页
Noise and Vibration Control
基金
四川省2015科技计划项目资助(2015GZ0126)
关键词
振动与波
减振器
阀片组当量刚度
有限元分析
方法研究
vibration and wave
shock absorber
stiffness of throttle slices
finite element analysis
research method
