摘要
试验搭建受电弓模态测试系统,构建受电弓三维空间结构并给出合适的坐标,采用锤击法对某受电弓进行模态试验,得到受电弓的固有频率、模态振型和阻尼比等相关参数。根据锤击法得到的锤击点与响应点之间的频率响应函数,采用在时域内的L1范数正则化方法构建冲击载荷稀疏反卷积模型,使用截断牛顿内点法对受电弓上框架冲击力进行识别。结果表明:L1范数正则化方法对处理冲击载荷这类的稀疏矩阵问题具有一定的准确性和稳定性。
A pantograph modal test system is built,the three-dimensional space structure of the pantograph is constructed and the appropriate coordinates are given.The modal test of a pantograph is carried out by the hammer method,and the natural frequency and modal mode shape of the pantograph and damping ratio and other related parameters are abtained.According to the frequency response function between the hammering point and the response point obtained by the hammering method,the L1 norm regularization method in the time domain is used to construct a sparse deconvolution model of the shock load,and truncated Newton method is applied to identify the frame impact of the pantograph.The results show that the L1 norm regularization method has certain accuracy and stability in dealing with sparse matrix problems such as shock loads.
作者
赵浪涛
缪炳荣
张哲
黄仲
袁哲锋
陈辉
ZHAO Langtao;MIAO Bingrong;ZHANG Zhe;HUANG Zhong;YUAN Zhefeng;CHEN Hui(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《机械制造与自动化》
2023年第5期197-201,共5页
Machine Building & Automation
基金
国家自然科学基金项目(51775456)
牵引动力国家重点实验室自主研究课题(2019TPL_T03)
牵引动力国家重点实验室自主研发项目(2023TPL_T08)
四川省重点研发项目(2023YFG0197)
中央高校基本科研业务费-专题研究项目(2682022ZTPY007)。
