运用Ansys和Hypermesh软件建立某客车整车的有限元模型,并对其进行整车模态仿真分析,得出各阶的固有频率与振型。基于Ansys的PSD功能,在模态分析的基础上进行两种工况下的随机振动谱分析和谐分析,得到较大位移节点的位移、速度和加速度响应曲线,以及两种工况下的共振频率和特征频率下特征点的位移峰值,为可能的结构改进方案提供分析基础。 Using Ansys and Hypermesh software to build a finite element model of a bus vehicle, and carrying on the vehicle modal simulation analysis, obtained the natural frequency and vibration mode of each order. Based on the PSD function of Ansys, based on the modal analysis, the random vibrating spectrum analysis and harmonic analysis under two conditions were carried out to get the displacement, velocity and acceleration response curves of large displacement nodes and the resonance frequency And the peak of the displacement of the feature points at the characteristic frequency provide the basis for the possible structural improvement programs.