摘要
研究如何建立、修正和运用有限元模型来模拟动车组车载部件故障。将三维的列车车体几何模型简化为二维模型,并建立合理的耦合约束关系。对模型进行模态分析,提取自然频率和模态振型,结合实验数据对模型的弹性模量和密度参数进行修正,并对修正模型进行动态响应分析得到车体振动响应。研究表明:1)修正后车体的一阶垂向、横向、棱形和扭转模态与实验误差大幅度缩小,仿真与实验数据的结果吻合;2)螺栓断裂故障仿真例子则表明基于修正模态的有限元模型可指导列车实验测点的布置、实验数据的分析和故障的判定。
The building,updating and application of the finite element model of high speed train car body are investigated.The complicated three dimension model of car body was represented by a simplified two dimension model,and reasonable coupled constraint conditions were imposed.First,the natural frequency and vibration modes of the car body were obtained by finite element modal analysis.Then the model was updated by using experiment results,parameters such as elastic modulus and density were modified.Finally,dynamic response of car body was calculated from the updated finite element model.The results indicates：1）The error of modified first four modes has been significantly reduced,the simulation coincides well with experiment data：2）The example of bolt failure simulation shows that the updated finite element model of car body can guide the placement strategy of testing point,analysis of testing results and fault judgment.
出处
《电子测量技术》
2016年第1期142-146,共5页
Electronic Measurement Technology
关键词
高速列车车体
模态分析
模态修正
故障模拟
high speed train car body
modal analysis
modal correction
fault simulation
