凹底平车车辆大小底架强度及模态分析  

Strength and Modal Analysis of Large and Small Underframe of a Depressed Center Flat Car

作　　者：许钦华 徐聪 李家宝 XU Qinhua;XU Cong;LI Jiabao(Technical Center of CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd,Qingdao 266031,China)

机构地区：[1]中车青岛四方车辆研究所有限公司,山东青岛266031

出　　处：《大连交通大学学报》2022年第5期41-46,共6页Journal of Dalian Jiaotong University

摘　　要：对某凹底平车车辆大小底架强度进行评估,详细介绍了工况设置的依据及模型加载和约束方法,对应力集中区域进行了相应的结构改进,改进后的结构满足强度要求.同时对大小底架的低阶模态频率及振型进行了识别,未出现自振频率耦合的现象.The strength of the underframe of a depressed center flat car is evaluated by the finite element method,the basis of working condition setting and the method of model loading and constraint are introduced in detail,the structure of the stress concentration area is improved,and the improved structure meets the strength requirements.At the same time,the low-order modal frequencies and modes are identified without the phenomenon of the self-vibration frequency coupling occuring in the low frequency band.

关 键 词：凹底平车 强度 模态 有限元 

分 类 号：U272.3[机械工程—车辆工程]