非堆积型多颗粒阻尼器等效力学模型及其减振性能分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (6) : 19-28.

论文

李小军1，田超杰1，黄绪宏2

作者信息 +

Equivalent mechanical model and vibration reduction performance analysis of a non-packed particle damper

LI Xiaojun1，TIAN Chaojie1，HUANG Xuhong2

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文章历史 +

摘要

为考虑颗粒群碰撞过程中时间效应对非堆积型多颗粒阻尼器(non-packed particle damper,NPPD)减振性能的影响，在现有考虑惯容的等效单颗粒力学模型(equivalent inertia single-particle model, EISM)研究基础上，提出了基于接触单元法的等效单颗粒力学模型(equivalent inertia single-particle model based on contact element method, EISM-CE)，并基于Runge-Kutta算法建立了NPPD单自由度结构运动状态求解算法。设计进行附加NPPD单层钢框架结构振动台试验，探究不同填充率对结构顶层位移频响曲线的影响规律，提出了EISM-CE参数取值原则，进而进行力学模型试验验证及模型对比分析。在模型验证合理性基础上，基于EISM-CE依次进行了自由振动、简谐激励及记录强震动下减振性能及能量变化规律分析。研究结果表明，与现有EISM相比，提出的基于接触单元法的EISM-CE模型及参数取值原则更加合理有效。减振性能数值分析结果表明，不同激励下NPPD均具有较好的减振性能；考虑碰撞时间效应后EISM-CE与EISM对应减振性能及机理分析结果存在一定的差异。

Abstract

To consider the impact of time effects during collision on the vibration reduction performance and mechanism of non-packed particle damper (NPPD), an equivalent single particle mechanical model based on contact element method (EISM-CE) is proposed on the basis of existing mechanical model (EISM), and a corresponding solving algorithm of motion state of NPPD-single degree of freedom structure is suggested based on the Runge Kutta algorithm. The shaking table test of a single-layer steel frame structure with additional NPPD was also designed and conducted. The influence of filling ratio on the frequency response curve of structural displacement was explored. Further validation and comparative analysis of the EISM-CE model was conducted based on the proposed model parameter determination principle. On the basis of verifying the rationality of the equivalent model, the numerical analysis on the vibration reduction effect and energy change law under free vibration, harmonic excitation, and recorded strong ground motion was carried out subsequently. The results show that the EISM-CE model and the corresponding determination principle of model parameters are more reasonable and effective than the existing EISM. The results of the numerical analysis show that NPPD has good damping performance under different excitations. The damping performance and mechanism of EISM-CE are somewhat different from EISM after considering the collision time effect.

导出引用

李小军1，田超杰1，黄绪宏2. 非堆积型多颗粒阻尼器等效力学模型及其减振性能分析[J]. 振动与冲击, 2024, 43(6): 19-28

LI Xiaojun1，TIAN Chaojie1，HUANG Xuhong2. Equivalent mechanical model and vibration reduction performance analysis of a non-packed particle damper[J]. Journal of Vibration and Shock, 2024, 43(6): 19-28

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