移动凸轮变阻尼隔振装置动态性能研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (19) : 110-116.

论文

移动凸轮变阻尼隔振装置动态性能研究

王兰1，邢海军1，吕书锋2

作者信息 +

Dynamic performance of translating cam variable damping vibration isolation device

WANG Lan1, XING Haijun1, L Shufeng2

Author information +

文章历史 +

摘要

针对线性隔振器在共振区需要大阻尼才能抑制共振峰，但在高频区大阻尼不利于隔振的问题，提出了基于移动凸轮的变阻尼隔振装置，该装置主要由水平对称布置的线性阻尼器及移动凸轮组成。将该变阻尼装置用于消极隔振系统，推导了变阻尼装置的等效阻尼系数，建立了隔振系统的动力学方程，采用谐波平衡法得到了方程的近似解析解；通过盛金法及数值仿真得到了其位移传递率曲线，分析了主要参数对系统隔振性能的影响。与传统的线性隔振器相比，选取合适的设计参数的变阻尼隔振系统，能更有效地抑制共振峰，同时还可以在中、高频区取得很好的隔振效果，最后以车辆为例，验证了前述结论。

Abstract

The linear vibration isolator requires large damping force to attenuate the resonance, but large damping force is unfavorable for vibration isolation in the high frequency region. In view of this, a variable damping isolator with moving cam was proposed, which was mainly comprised of translating cam with a pair of rollers arranged symmetrically and horizontally and two linear dampers. Firstly the equivalent damping coefficient of the variable damping device was derived from mechanical equilibrium. The dynamic equation of the variable damping system was established under pavement harmonic excitation, and the analytical solution to the system was obtained using the harmonic equilibrium method. Secondly, the transmissibility curves of numerical simulation results of the variable damping isolation system were illustrated and analyzed by compared with the linear damping isolation system. If the appropriate parameters of the variable damping isolator are selected in the design, its effects on attenuating the resonance will be superior to that of the corresponding linear damping isolator, meanwhile, its vibration isolation effect will be slightly better than that of the corresponding linear damping isolator in the region of high frequency ratio. Finally, the aforementioned conclusion was verified by applying the variable damping isolator to transport vehicles.

导出引用

王兰1，邢海军1，吕书锋2. 移动凸轮变阻尼隔振装置动态性能研究[J]. 振动与冲击, 2023, 42(19): 110-116

WANG Lan1, XING Haijun1, L Shufeng2. Dynamic performance of translating cam variable damping vibration isolation device[J]. Journal of Vibration and Shock, 2023, 42(19): 110-116

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