本文基于PolyMAX模态识别算法，采用力锤激励法，测试了不同边界条件下轨道车辆轮对的模态参数，对比分析轨道约束对轮对典型模态频率的影响规律。在此基础上，建立轮对有限元仿真模型，计算自由边界下的轮对模态频率与模态振型，并与试验结果进行置信度校验，结果表明轮对模态试验仿真结果一致性较好，轮对建模方法及仿真模型可以用于车辆设计及优化阶段振动模态匹配的快速预测。
Based on PolyMAX modal identification algorithm and hammer excitation method, the modal pa-rameters of the wheelset of rail vehicles under different boundary conditions are tested, and the influence of track constraints on the typical modal frequencies of the wheelset is compared and analyzed. On this basis, the finite element simulation model of the wheelset is established; the modal frequencies and modal shapes of the wheelset under the free boundary is calculated and verified with the test results. The results show that the simulation results of the modal test of the wheelset are in good agreement. The modeling method and finite element model of the wheelset can be used for the rapid prediction of the vibration modal matching in the vehicle design and optimization stage.
