基于工作模态分析的车辆车体刚体模态识别研究  

Rigid body modal recognition of urban rail transit vehicles based on working modal analysis

作　　者：黄五羊 HUANG Wuyang

机构地区：[1]中车株洲电力机车有限公司,湖南株洲412001

出　　处：《现代机械》2024年第1期88-91,共4页Modern Machinery

摘　　要：模态是表征结构固有特性的重要参数,结构模态参数的准确获取对校准模态数值计算模型以及后续结构动力修改具有重要参考意义。试验模态分析是获得大型复杂结构模态特征的重要手段。按照激励方式的不同实验模态分析可分为力锤激励和激振器激励,对于轨道车辆整车模态测试,常规的激励手段往往因其激励能量不足而难以获取车辆的刚体模态特性。因此本文以楔块组合法作为激励输入,结合工作模态分析技术(OMA)对某城轨车辆进行刚体模态参数识别,其相关试验方法及结果可为轨道车辆刚体模态参数的获取提供参考。Modal is an important parameter to characterize the inherent characteristics of the structure.The accurate acquisition of structural modal parameters has important reference significance for the calibration of modal numerical calculation model and the subsequent structural dynamic modification.According to the modes of excitation,the experimental modal analysis can be divided into force hammer excitation and shaker excitation.For the modal test of the whole rail vehicle,the conventional excitation means are often difficult to obtain the rigid body modal characteristics of the vehicle because of its insufficient excitation energy.Therefore,in this paper,the wedge group method is used as the excitation input,and the working modal analysis technology(OMA)is used to identify the rigid body modal parameters of an urban rail transit vehicle.The method and results can provide reference for the obtaining of rigid body modal parameters of rail vehicles.

关 键 词：OMA 城轨车辆 模态参数识别 半功率带宽法 

分 类 号：U270.1[机械工程—车辆工程] TH113.1[交通运输工程—载运工具运用工程]