高速车体结构参数对车体模态频率的影响分析  

Analysis on Effect of Structure Parameters of High-speed Car Body on Modal Frequencies

作　　者：于金朋[1,2] 张卫华[1] 孙帮成 黄雪飞 张立民[1] 肖守讷[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]唐山轨道客车有限责任公司产品技术研究中心,河北唐山063035

出　　处：《铁道学报》2015年第9期32-37,共6页Journal of the China Railway Society

基　　金：国家科技支撑计划(2013BAG24B00)

摘　　要：合理的高速车体结构设计不仅能最大程度发挥车体结构的承载能力,也能减小车体振动,提高乘坐舒适度。为研究车体结构参数对车体模态频率的影响,建立了车体结构有限元分析模型,深入分析车体结构各部件主要尺寸的厚度变化对车体模态特性的影响,得到了内外地板、侧墙内壁及车顶等厚度尺寸对车体垂弯、扭转和菱形模态频率影响规律。结果表明,车顶厚度的变化对车体模态频率及车体弯扭频率比的影响最大,从而为车体结构的动态设计提供依据。Reasonable structure design of the high-speed car body not only maximizes the load carrying capacity of the structure,,but also reduces the vibrations of the car body and improves ride comfort.In order to study the effect of structure parameters on modal frequencies,the FEM of car body structure was established to fur-ther analyze the effect of the thickness variation of the main size of each part of the body structure on modal fre-quencies.According to the simulation analysis,the influence of the thickness of inner and outer plates of floor, inner plate of sidewall and roof on the vertical bending,torsion and rhombic modal frequencies was derived.The analysis results indicated the variation in the roof thickness posed greatest effect on the ratio between body mo-dal frequency and car body bending and torsion frequency,thereby providing references for the dynamic design of car body structure.

关 键 词：高速车体 车体结构 结构参数 模态频率 

分 类 号：U266.2[机械工程—车辆工程] U268.3[交通运输工程—载运工具运用工程]