一种内部碰撞型三质量阻尼器试验验证及数值模拟分析

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (14) : 84-91.

论文

郑雨强1，王菁菁2

作者信息 +

Experimental validation and numerical analyses of a novel type of vibro-impact tri-mass damper

ZHENG Yuqiang1，WANG Jingjing2

Author information +

文章历史 +

摘要

提出了一种新型控制装置——碰撞型三质量阻尼器（vibro-impact tri-mass damper ,VITM），该装置基于三类质量阻尼器发展而成，包含一个调谐质量阻尼器、一个非线性能量阱，以及位于两者之间的自由质量，中间质量可与两侧质量发生碰撞。首先，介绍VITM工作原理，建立运动方程和碰撞模型；其次，实施动力试验，验证VITM理论模型的准确性；最后，通过数值模拟方法对VITM的耗能特点、参数影响、频率和能量鲁棒性，以及减震性能展开研究。分析结果表明，VITM主要依靠碰撞耗能，减振效果显著，无需再增设阻尼装置，且碰撞发生在装置内部，不会增加受控结构加速度；同时，VITM较已有装置具备更强的频率和能量鲁棒性，在脉冲型荷载和地震作用下均展现出优越的控制性能，为工程结构减震提供了新方法。

Abstract

A novel type of control device, vibro-impact tri-mass damper (VITM), is proposed. VITM is developed based on three types of mass dampers, including a tuned mass damper, a nonlinear energy sink, and a free mass between them. The middle mass can collide with the two side masses. First, the working principle of VITM is introduced and the equation of motion and impact model are derived. Then, experiment is conducted to validate the theoretical model of VITM. Finally, numerical simulations are performed to examine the energy dissipation feature, parameter influences, frequency and energy robustness, and seismic performance of VITM. The results show that VITM mainly relies on vibro impacts rather than device damping to mitigate structural response. The impacts are within the device thus do not increase the structural acceleration. VITM has stronger frequency and energy robustness than its counterparts and shows excellent control capacity under both impulsive and seismic excitation, providing a new method for seismic protection of engineering structure.

导出引用

郑雨强1，王菁菁2. 一种内部碰撞型三质量阻尼器试验验证及数值模拟分析[J]. 振动与冲击, 2023, 42(14): 84-91

ZHENG Yuqiang1，WANG Jingjing2. Experimental validation and numerical analyses of a novel type of vibro-impact tri-mass damper[J]. Journal of Vibration and Shock, 2023, 42(14): 84-91

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