负载自适应准零刚度隔振系统设计与特性分析

Design and characteristic analysis of quasi-zero stiffness vibration isolation system with adaptive load

摘要

针对负载变化会削弱准零隔振系统性能，隔振性能无法根据负载大小自适应调节的问题，本研究提出一种多片对合碟形弹簧与螺旋弹簧并联的负载自适应准零刚度隔振系统。首先研究了正负刚度单元的物理特性并建立其数学模型，进而探究了低频隔振特性以及关键参数可行设计域，然后分析了扫频信号激励下的动态响应，对比分析了负载自适应准零刚度系统的隔振性能，最后仿真验证了模型的合理性以及该隔振系统良好的隔振性能。研究结果表明：所提出的隔振系统可通过改变螺旋弹簧预拉量来适应负载的变化，且当负载变化时，其低频隔振效果明显高于不可调准零刚度隔振系统。研究可为准零刚度隔振系统的设计提供一定的理论指导。

Abstract

The paper proposes an adaptive quasi-zero stiffness vibration isolation system with multiple plate interlocking disc springs and helical springs in parallel to address the issue of non-adjustable performance of quasi-zero vibration isolation systems according to load. The study involves the analysis of physical characteristics and mathematical models of positive and negative stiffness elements, exploration of low-frequency vibration isolation characteristics and feasible design parameters, dynamic response analysis under swept frequency signal excitation, comparison and analysis of vibration isolation performance, as well as verification through simulation. The results demonstrate that the proposed system can adapt to changes in load by adjusting the pretension of the coil spring, thus resulting in significantly higher low-frequency vibration isolation effect compared to non-adjustable zero-stiffness systems. This research provides theoretical guidance for designing quasi-zero stiffness vibration isolation systems.

关键词

可调式隔振系统 / 碟形弹簧 / 准零刚度 / 低频隔振

Key words

adjustable vibration isolation system / dished spring / quasi-zero stiffness / low frequency vibration isolation

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