吊挂刚度对车体和设备模态的影响

摘要

Body modals and hanging equipment modals are important characteristics of the vehicles. Their modal frequencies vary with the change of various factors. To obtain the elastic modals, the vehicle’s body is equivalent to an Euler Bernoulli beam. Based on the finite element model of a certain type of high speed train and ANSYS software, the variations of the elastic modals of the vehicle’s body, and the frequency and MAC of the modals of the hangers are studied under different axial, horizontal and vertical stiffness of the hangers. This work provides the basis for modal test and engineering calculation of vehicles.%模态是车辆的一项重要特性，包括车体模态和吊挂设备模态，各阶模态频率随着各种因素的变化而有所不同。为考虑车体弹性模态，将车体等效为欧拉伯努利梁。在某型高速列车有限元模型基础上，基于ANSYS仿真软件，分别改变吊挂纵向，横向，垂向刚度，研究车体弹性模态和吊挂设备刚体模态频率及振型MAC的变化，给出模态频率和振型的变化规律，为模态试验和工程计算提供参考依据。