适应负载变化的准零刚度扭转隔振器设计与分析

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (23) : 307-314.

论文

张春松1，李学勇1，2，3，张硕1，徐定民1

作者信息 +

Design and analysis of quasi-zero stiffness torsional vibration isolator adapting to load changes

ZHANG Chunsong1, LI Xueyong1,2,3, ZHANG Shuo1, XU Dingmin1

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文章历史 +

摘要

针对现有准零刚度扭转隔振器仅适用于恒定负载的问题，设计了一种通过调节正刚度来适应负载变化，同步调节负刚度使隔振器始终工作在准零刚度状态的新型准零刚度扭转隔振器。该隔振器由提供负刚度的扭转磁弹簧和提供正刚度的弹簧片组成，其中扭转磁弹簧由径向磁化的内、外环磁铁组成，通过调节内、外环的轴向相对位置改变负刚度，利用等效磁荷法得到了磁弹簧的扭矩计算模型，分析了弹簧片参数对正、负刚度匹配后刚度特性的影响。建立了系统的动力学模型，采用谐波平衡法求解了隔振器的动态响应，分析了激励幅值和阻尼比对隔振器隔振性能的影响，结果表明，扭转隔振器在不同载荷状态下均具有良好的低频隔振效果。设计制造了隔振器样机，并进行了不同静载荷状态下的静力学实验，实验得到的扭矩-角位移曲线与理论计算结果吻合良好，实验结果表明，该隔振器可以通过调节磁弹簧的轴向相对位置和弹簧片的有效作用长度，实现正、负刚度的同步调节。
关键词：扭转隔振；准零刚度；可变负载；非线性分析

Abstract

A new torsion Quasi-Zero-Stiffness vibration isolator is proposed. It can adjust the positive stiffness to adapt to the load change, and adjust the negative stiffness synchronously to make the isolator always work in the quasi-zero-stiffness state. The vibration isolator is composed of a torsion magnetic spring (TMS) and leaf springs. The TMS is composed of inner and outer ring magnets magnetized radially. Adjusting the relative axial positions of the inner and outer rings can change the negative stiffness. The torque calculation model of the TMS is obtained using the equivalent magnetic charge method. The influences of spring parameters on the stiffness characteristics were analyzed. The dynamic model of the system was established and the dynamic response of the isolator was solved using harmonic balance method. The influence of excitation amplitude and damping ratio on the isolation performance of the isolator was analyzed. The results show that the isolator has good isolation effect under different loads. Vibration isolator prototype was manufactured, the experiment of torque and angular displacement curve is in good agreement with theoretical calculation results. The experimental results show that the isolator can realize the synchronous adjustment of positive and negative stiffness by adjusting the relative axial position of TMS and the effective length of spring.
Key words: torsion vibration isolation; quasi-zero-stiffness; variable load; nonlinear analysis

导出引用

张春松1，李学勇1，2，3，张硕1，徐定民1. 适应负载变化的准零刚度扭转隔振器设计与分析[J]. 振动与冲击, 2022, 41(23): 307-314

ZHANG Chunsong1, LI Xueyong1,2,3, ZHANG Shuo1, XU Dingmin1. Design and analysis of quasi-zero stiffness torsional vibration isolator adapting to load changes[J]. Journal of Vibration and Shock, 2022, 41(23): 307-314

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