基于ANSYS二次开发的轮轨耦合模型及应用研究  

Research on Wheel-rail Coupling Model and Its Application Based on Secondary Development of ANSYS

作　　者：孟宪金 刘林芽[1] 秦佳良 李辉 左志远 MENG Xianjin;LIU Linya;QIN Jialiang;LI Hui;ZUO Zhiyuan(Engineering Research Center of Railway Environment Vibration and Noise,Ministry of Education,East China Jiaotong University,Nanchang330013,China)

机构地区：[1]华东交通大学铁路环境振动与噪声教育部工程研究中心,南昌330013

出　　处：《噪声与振动控制》2022年第1期8-13,47,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51578238,51968025);江西省自然科学基金重点资助项目(20192ACBL20009);江西省青年科学基金资助项目(20202BABL214048);江西省教育厅科学技术研究资助项目(GJJ200658)。

摘　　要：基于ANSYS的二次开发技术,首先利用APDL语言提出一种具有广泛适用性的轮轨耦合相互作用计算方法。在该计算方法中,车辆部分基于多体动力学理论建模,并通过APDL语言编程到ANSYS中,再根据有限元理论对轨道部分进行仿真,充分考虑轮轨非线性接触,车辆系统和轨道系统分别采用显式积分和隐式积分求解。然后,通过与文献中采用交叉迭代算法计算得到的车辆-轨道垂向耦合系统动力响应对比,验证模型和计算方法的正确性。最后,以高速列车-CRTSⅡ型板式无砟轨道为例,利用该方法分析扣件失效数量对耦合系统动力响应的影响。研究结果表明:单个扣件失效对车辆系统的动力响应影响有限,对于钢轨的动力响应影响较大;扣件失效数量的增加会显著增大车轨系统的动力响应,加剧轮轨的磨耗和相邻钢轨扣件的失效。提出的计算方法可以对不同型式的轨道结构和轨下基础进行分析,对于轮轨耦合动力特性的研究具有很好的适用性。Based on the secondary development technique of ANSYS,a widely applicable calculation method of wheel-rail coupling interaction is proposed by adopting APDL language.In this method,model of the vehicles is established based on the multi-body dynamics theory,and is programmed into ANSYS by APDL language.The track is simulated by means of the finite element theory with the nonlinear contact between wheel and rail fully considered.The vehicle system and track system are solved by explicit integration and implicit integration respectively.Then,the correctness of the model and calculation method is verified by comparing the results with the published dynamic responses of the vehicle-track vertical coupling system in literatures which were calculated by cross iteration algorithm.Finally,with the high-speed train-CRTSⅡslad ballastless track as an example,this method is used to analyze the influence of the number of failure fasteners on the dynamic response of the coupling system.The results show that a single fastener failure only has a small influence on the dynamic response of vehicle system,but has a great impact on the dynamic response of the rail;the increase of the number of failure fasteners will significantly enlarge the dynamic response of vehicle-rail system,and aggravate the wheel-rail wear and the fai-lure of adjacent rail fasteners.The proposed calculation method can be used to analyze different types of track structures and foundations beneath the rail,and has good applicability for the research of wheel-rail coupling dynamic characteristics.

关 键 词：振动与波 ANSYS二次开发 显式积分 隐式积分 轮轨耦合动力学 扣件失效 

分 类 号：U211.3[交通运输工程—道路与铁道工程]