Vibration Analysis of Commercial Vehicle Rigid-elastic Model Based on Pseudo-excitation Method
This paper studies the random vibration of commercial vehicles.In view of the obvious characteris-tics of the body elasticity of commercial vehicles,a rigid-elastic vibration model more in line with the reality is es-tablished by using the elastic beam theory.The pseudo road excitation of the front and rear wheels of the vehicle is established by using the pseudo-excitation method.In order to improve the solution efficiency,based on pseu-do-excitation method,the frequency response characteristics of the vibration system of commercial vehicles,the pseudo response of the vibration response and the power spectral density are derived.The power spectral density and root mean square value of vehicle body acceleration are used as evaluation indicators.The comparison with the simulation results of the rigid body model shows that the elasticity of the commercial vehicle body has a great impact on the ride comfort.
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