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| 基于子结构法的重载凹底平车底架的固有动态特征分析 | |
| 引用本文： | 周素霞,谢云叶,谢基龙,张俊清.基于子结构法的重载凹底平车底架的固有动态特征分析[J].铁道学报,2011,33(8). |
| 作者姓名： | 周素霞 谢云叶 谢基龙 张俊清 |
| 作者单位： | 1. 北京建筑工程学院机电与汽车工程学院,北京,100044 2. 济宁职业技术学院汽车工程系,山东济宁,272037 3. 北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京,100044 |
| 摘 要： | 基于有限元分析,本文研究重载凹底平车底架弹性体的振动模态以及模态阶数的选取对车辆系统动态响应的影响。通过引入超单元,建立弹性体在模态坐标上的动力学方程,经过坐标变换得到物理坐标系上的方程;建立凹底架的有限元分析模型,计算分析其固有动态特征;同时,采用子结构法缩减处理凹底架有限元模型,建立有动态特征的凹底架弹性体模型,使描述凹底架的自由度总数减少,同时也保证计算的精度。对凹底架子结构超单元模型,计算分析振动模态,并与其有限元模型的模态结果进行比较。结果表明:子结构法的计算精度高,能满足车辆系统结构振动响应分析的要求。通过计算凹底架模态阶数对车辆系统动态响应的影响,得出选取凹底架的前8阶模态是合适的,有足够高的计算精度。 |
| 关 键 词： | 子结构法 重载 多体系统动力学 有限元 |
Inherent Dynamic Characteristics Analysis of Heavy-load Depressedcenter Flat Frame Based on Substructure Method |
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| ZHOU Su-xia,XIE Yun-ye,XIE Ji-long,ZHANG Jun-qing.Inherent Dynamic Characteristics Analysis of Heavy-load Depressedcenter Flat Frame Based on Substructure Method[J].Journal of the China railway Society,2011,33(8). | |
| Authors: | ZHOU Su-xia XIE Yun-ye XIE Ji-long ZHANG Jun-qing |
| Institution: | ZHOU Su-xia1,XIE Yun-ye2,XIE Ji-long3,ZHANG Jun-qing3(1.School of Mechanical-Electronic and Automobile Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China,2.Jining Vocational Technology College,Jining 272037,3.Engineering Research Center of Structure Reliabilityand Operation Measurement Technology of Rail Guided Vehicles(Beijing Jiaotong University),Ministry of Education,China) |
| Abstract: | On the basis of the FE analysis the effects of vibration modes and selected modal numbers of the flexible depressed-center flat frame on dynamic responses of the vehicle system are studied.The dynamic equation of the depressed-center flat frame has been derived.And its dynamic equation on modal coordinates,which can be transformed to physical coordinates,has also been established after super-elements are introduced.On the basis of the modal analysis theory the needed modal shapes and parameters of the frame... |
| Keywords: | substructure method heavy load multi-body dynamics finite element |
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