随机道路谱作用下的汽车响应特性

Vehicle response characteristics under the action of random road spectrum

针对驱动桥壳在随机道路谱作用下的响应特性问题,建立了汽车振动的7自由度动力学方程,应用随机振动理论求解出了汽车在路面不平度下的频率响应(FR),利用Matlab得到了不同速度下的后桥垂向振动加速度功率谱密度(PSD)。研究结果表明该随机道路谱作用下的汽车响应特性研究对驱动桥的动态设计具有一定的参考和应用价值。

For the study on the response characteristics of drive axle housing under the action of random road spectrum,a seven-degree-of-freedom（7-DOF） model was developed,the frequency response（FR） to road roughness was solved by random vibration theory.Further-more,the vertical vibration acceleration power spectral density（PSD） of rear axle under different speeds was solved by Matlab.Those results have reference and application value for the design and fatigue life prediction of the drive axle housing.