基于道路模拟激励谱的AMT执行机构虚拟振动试验方法研究

Research of the Virtual Vibration Test Method of AMT Actuator based on Road Simulation Excitation Spectrum

AMT执行机构的振动疲劳可靠性是AMT最重要的性能之一,为对AMT执行机构的振动疲劳可靠性进行准确高效的分析和评价,在东风汽车试验场采集了AMT及其执行机构实际道路行驶载荷谱,结合开发的AMT执行机构多轴道路模拟试验台,采用时域和频域误差加权系数均为0.5的远程参数方阵控制(RPC)载荷谱模拟迭代方法在室内准确高效地再现了AMT执行机构实际行驶载荷谱,从而提取了道路模拟激励谱。基于开发的AMT执行机构多轴道路模拟试验台,利用HYPERWORKS有限元分析软件和ADAMS多体动力学仿真软件,建立了AMT执行机构刚柔耦合虚拟试验平台,以提取的道路模拟激励谱为输入进行了仿真分析,并结合实际采集行驶载荷谱和室内道路模拟试验结果进行了仿真结果验证,从而建立了基于道路模拟激励谱的AMT执行机构虚拟振动试验方法,为AMT执行机构振动疲劳可靠性考核和评估提供了一种行之有效的手段和方法。

Abstract The vibration fatigue reliability of AMT actuator is one of the most significant performances of AMT. For acquiring the accurate and efficient analysis and evaluation of AMT actua- tor vibration fatigue reliability, the AMT actuator actual driving road load spectrum are collected in Dongfeng test field, combined with the developed AMT actuator multi--axes road simulation test bench, the load spectrum simulation iteration method based on remote parameter matrix control with time--frequency domain error weighting coefficients 0.5 respectively succeeded in achieving accurate and efficient reproducing of AMT actuator actual driving road load spectrum and thus road simulation excitation spectrum are extracted. By using the finite element analysis soft HYPERWORKS and multi --body dynamics simulation software ADAMS, the virtual rigid--flexible coupled road simulation test platform is built with reference to the actual AMT actuator multi--axes road simulation test bench. Simulation analysis is conducted with the achieved road simulation excitation spectrum as input and the outcomes are verified by actual collected spectrum and road simulation test results, thus the virtual vi- bration test method for AMT actuator based on road simulation excitation spectrum is established, an effective approach and method for AMT actuator vibration fatigue reliability assessment is provided.