基于多体动力学的80m拱桥车桥耦合振动研究

发布时间：2018-04-20 01:06

本文选题：车桥耦合振动 + 车桥系统　；参考：《西南交通大学》2015年硕士论文

【摘要】：随着我国交通事业的不断进步特别是高速铁路的快速发展,列车运行时速显著提高,高速铁路布设的范围不断扩大。桥梁作为高速铁路线路上的重要组成部分,其结构刚度、整体线形、运行平稳性以及动力性能与动力响应等均有较高要求,对与之相关的车桥耦合振动行为进行研究具有工程实际意义。论文介绍了车桥耦合理论的发展历程,回顾了车桥耦合振动研究的典型阶段性成果,针对桥梁结构,介绍了桥梁动力方程建立的基本方法,通过有限元结构分析程序(ANSYS)建立了具体的桥梁动力分析模型,采用兰索斯法对其动力特性进行了分析,针对列车-桥的耦合关系,介绍的轨道不平顺的相关理论并通过三角级数和二次滤波两种不同的方法对列车轨道不平顺激励进行了模拟分析,针对列车车体介绍了多体动力学的相关理论,通过多体动力学软件(SMPACK)建立了精细化的CHR3型动车组模型。基于上述工作,通过软件的联合仿真,根据轮轨接触关系将桥梁系统和车辆系统进行耦合,得到了整体的动力耦合方程,并详细说明了有限元软件ANSYS和多体动力学软件SMPACK联合仿真的基本实现方法。援引实际桥梁工程为算例,论文以一座80m铁路拱桥为工程背景,计算了CHR3型动车组和货车在不同时速下过桥的车桥耦合振动响应,通过与相关描述规范进行比对,该桥的车桥耦合动力性能良好,同时,通过算例表明,联合仿真有着精细化程度高,计算速度快等优点。为今后同类桥型的设计提供了一定的理论依据。
[Abstract]:With the continuous progress of China's transportation industry, especially the rapid development of high-speed railway, the speed of train running has been significantly increased, and the scope of high-speed railway layout has been continuously expanded. As an important part of high-speed railway line, the structure stiffness, overall alignment, smooth operation, dynamic performance and dynamic response of the bridge have higher requirements. It is of practical significance to study the coupled vibration behavior of vehicle and bridge. This paper introduces the development course of vehicle-bridge coupling theory, reviews the typical stage achievements of vehicle-bridge coupling vibration research, and introduces the basic method of establishing bridge dynamic equation for bridge structure. The dynamic analysis model of bridge is established by finite element structural analysis program ANSYS. the dynamic characteristics of the bridge are analyzed by Ranssos method, and the coupling relationship between train and bridge is analyzed. The related theory of track irregularity is introduced, and the train track irregularity excitation is simulated and analyzed by two different methods of triangle series and quadratic filter. The related theory of multi-body dynamics is introduced for the train body. A fine model of CHR3 EMU was established by means of the multibody dynamics software SMMPACK. Based on the above work, through the joint simulation of the software, the bridge system and the vehicle system are coupled according to the wheel-rail contact relationship, and the overall dynamic coupling equation is obtained. The basic method of joint simulation of finite element software ANSYS and multibody dynamics software SMPACK is described in detail. Taking an 80m railway arch bridge as an example, the paper calculates the coupled vibration response of a CHR3 EMU and a truck crossing the bridge at different speeds, and compares it with the relevant description code. The vehicle-bridge coupling dynamic performance of the bridge is good. At the same time, the example shows that the joint simulation has the advantages of high precision and fast calculation speed. It provides a certain theoretical basis for the design of the similar bridge type in the future.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3;O313.7

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