Rigid body modal recognition of urban rail transit vehicles based on working modal analysis
Modal is an important parameter to characterize the inherent characteristics of the structure.The accurate acquisi-tion 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 a-nalysis 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 in-sufficient 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.
NETL
NSTL
万方数据
维普
