Impact of dynamic vibration absorbers on vehicle vertical vibration energy and suspension performances

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (22) : 169-174.

BAI Shipeng,HOU Zhichao

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Abstract

The variation of vehicle vertical vibration energy and suspension performances was addressed when a dynamic vibration absorber (DVA) was adopted at different positions.Based on a quarter-car model with tire damping taken into account, two vehicle models were constructed when the DVA was matched to the sprung mass or the unsprung mass.Regarding the road excitation as simple harmonic or random, indexes were respectively defined to evaluate suspension performances and dissipated power during vehicle vibration.Numerical simulations were then conducted so as to reveal the impact of the DVAs in terms of system amplitude-frequency characteristics and the root mean square values of the dynamic response.The results with both road excitations show that the sprung-DVA is more efficient in improving suspension performances, while the unsprung-DVA absorbs more dissipated vibration energy.For the random excitation on the other hand, either of the introduced DVAs will not change the overall dissipated energy.

Key words

dynamic vibration absorber(DVA) / vibration energy / vehicle vertical dynamics / tire damping

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BAI Shipeng,HOU Zhichao. Impact of dynamic vibration absorbers on vehicle vertical vibration energy and suspension performances[J]. Journal of Vibration and Shock, 2020, 39(22): 169-174

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