The Effect of the Suspended Equipment on the Vertical Vibration Level of High-Speed Vehicle

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (19) : 46-51.

HE Xiaolong, ZHANG Limin, LU Lianyao

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Abstract

The big-mass equipment under the car has an important influence on the vehicle's vibration mode characteristics and ride comfort. In this article, the 9-freedom rigid-elastic coupling vehicle system has been established. And the effect of the equipment on the vertical vibration of the vehicle has been researched through the reference points' acceleration FRF.This paper obtains the vehicle acceleration frequency response characteristics at body vertical bending frequencies considering thefactors ofgeometric filtering effect, equipment installation type (rigid, flexible), running speed.Finally, the influence of equipment mass and damping ratio on vehicle body vibration levels have been studied. The result shows that: the elastic suspend can effectively reduce the vibration level of the car body. The geometric filtering effect has quite obvious influence when speed lower than 150km/h. It is necessary to take the geometric filtering effect into account to reduce the vibration level when choose the equipment mass and damping ratio reasonably.

Key words

suspended equipment / acceleration frequency response function / geometric filtering effect / Installation methods

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HE Xiaolong, ZHANG Limin, LU Lianyao. The Effect of the Suspended Equipment on the Vertical Vibration Level of High-Speed Vehicle[J]. Journal of Vibration and Shock, 2017, 36(19): 46-51

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