局部应变法敞车侧板模态测试及结构改进  

Modal Testing and Improvements of Side Plate of Open Top Wagon Based on Local Strain Method

作　　者：刘凤芹[1] 李向伟[1] 

机构地区：[1]中国北车集团 齐齐哈尔轨道交通装备有限责任公司,黑龙江齐齐哈尔161002

出　　处：《大连交通大学学报》2013年第6期27-30,共4页Journal of Dalian Jiaotong University

基　　金：铁道部科技研究开发计划资助项目(2011J014-B)

摘　　要：通过某车体侧板结构的模态试验,基于局部应变法测定了侧板的固有频率和振型,通过两种试验结果的相互验证,表明在23.389 Hz频率下,车体侧板的两端,出现了局部二阶振型,局部应变明显增加,在接近该频率的激扰下,存在共振带.通过改进侧板结构刚度,对改进后的新结构按相同的试验方法进行了测试和分析,局部应变明显减小,共振现象消失,证明新设计的侧板结构更合理有效.In the modal testing of the side plate of wagon body,the inherent frequency and vibration mode of the side plate are measured by local strain method.The comparison of the results shows that the second order vibration mode happens to the two ends of the side plate of wagon body under the frequency of 23.389 Hz with obviously increased local strain,and the resonance phenomenon happens under the excitation of the approximate frequency.After modification of the rigidity of the side plate,the same test and measurement results show that no resonance phenomenon happens,which means that the improved side plate structure is more reasonable.

关 键 词：敞车侧板 模态测试 应变测试 结构改进 

分 类 号：U272.2[机械工程—车辆工程]