Analysis on influence of flexible carbody and frame on vehicle's vibration response
In this article,in order to consider the carbody and the frame as aflexible body in the vehicle multi-body dynamics simulation,the finite-element sub-structure analysis is used to cut the finite-element model of the carbody and the frame.Through the rigid-flexible coupling multi-body dynamics simulation,the vehicle's vibration acceleration response at the actual measuring point on the line is worked out,and it is compared with the measured data,so as to explore the influence of the flexible carbody and frame on the vehicle's vibration response.The results show that compared with the multi-rigid body dynamics model,the ve-hicle's vibration response at more frequencies will increase after the carbody and the frame are subject to flexible treatment and simulation;the root mean square value of the vibration acceleration at the measured point is also larger,which is closer to the measured data.It has proved that it is necessary to consider the carbody and the frame as a flexible body in the dynamic analysis on the vehicle system.
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