特种车辆系统动力学特性模拟分析  

Dynamics feature simulation analysis of a depressed center flat car system

作　　者：孙志春[1,2] 周志立[3] 李言[1] 谢云叶[2] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048 [2]济宁职业技术学院,山东济宁272037 [3]河南科技大学车辆与动力工程学院,河南洛阳454900

出　　处：《北京交通大学学报》2012年第3期32-35,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：济宁市科技发展计划项目;济宁职业技术学院博士基金资助项目(2010BSLX02)

摘　　要：基于弹性体原理,详细分析了一种特种车辆——凹底平车中大底架的弹性振动特性.将多体系统动力学理论与有限元理论相结合,在对车辆系统中各种因素合理分析的基础上,正确引入大底架的弹性振动特性,构建了凹底平车刚柔耦合多体系统动力学模型,计算分析了车辆系统的动力学特性,进而得到了运行速度和车辆上所关心参数对车辆系统动力学响应的影响,并与实测结果做了系统比较.结果表明,在选定的计算点,该车辆系统动力学响应计算值与试验值的最大误差仅为3.84%,在工程允许范围内.此种分析方法能减小车辆系统的模拟计算规模,提高计算速度,同时又能保证计算的准确性,能满足车辆系统动力学特性分析的需要.Based on the theories of elastic body, the vibration features of chassis frame in a depressed center flat car were studied in details. By combining the theories of multibody system dynamics and fi- nite element, and after correctly simulating many concerned factors in the vehicle system, the rigidflexible coupling dynamics model of the vehicle system including the elastic vibration features of the chassis frame was established to calculate its dynamics features. At the same time, the influencing results of operating velocity and other concerned parameters on its dynamics response were also studied, and compared in details with the testing results to obtain relative errors between them. It is shown that from above analysis the maximum value of relative errors of its dynamics response on referenced points of the vehicle system is 3.84 per cent which is within the limits permitted by engineering. The method presented here can greatly reduce the calculation of vehicle multibody system, improve calculation speed, and ensure the precision of solution simultaneously, which can meet the analysis of structural vibration in vehicle system.

关 键 词：凹底平车 动力学特性 模拟 振动特性 刚柔耦合多体系统 

分 类 号：U272.65[机械工程—车辆工程] O327[交通运输工程—载运工具运用工程]