Abstract A high-static-low-dynamic stiffness (HSLDS) isolator using cam-roller-spring mechanism with a specially designed cam profile is proposed in this study. The proposed HSLDS isolator is mainly composed of a cam-roller mechanism (negative mechanism) and a vertical spring (positive mechanism). Different from other studies, the cam profile in this paper can be designed specially to accommodate different working requirements. Firstly, the cam design theory is described and a cam whose force-displacement variation is a piecewise linear function is established. After that, the dynamic response of the HSLDS isolator under base excitation is acquired by the Averaging Method, at the same time, the stability and parameters effect of the dynamic system are discussed. Finally, an experimental test system is set up to verify the isolation performance of the HSLDS isolator and its corresponding linear isolator under base excitation. The results show that the HSLDS isolator starts to have isolation effect at 2.36 Hz, while the linear isolator is 3.20 Hz. Meanwhile, the resonance amplitude of the HSLDS isolator is smaller than the linear isolator. The proposed HSLDS isolator could achieve a better vibration isolation performance than the linear isolator, especially in the low-frequency range.

中文翻译：

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具有凸轮-滚子-弹簧机构的高静-低动刚度隔振器的分析与实验研究

摘要 本研究提出了一种高静低动刚度（HSLDS）隔振器，采用凸轮-滚子-弹簧机构，具有特殊设计的凸轮轮廓。建议的 HSLDS 隔离器主要由凸轮滚子机构（负机构）和垂直弹簧（正机构）组成。与其他研究不同，本文中的凸轮轮廓可以专门设计以适应不同的工作要求。首先，描述了凸轮设计理论，并建立了一个力-位移变化为分段线性函数的凸轮。之后，采用平均法得到基极激励下HSLDS隔离器的动态响应，同时讨论了动态系统的稳定性和参数影响。最后，搭建实验测试系统，验证HSLDS隔离器及其对应的线性隔离器在基极激励下的隔离性能。结果表明HSLDS隔离器在2.36Hz开始有隔离效果，而线性隔离器是3.20Hz。同时，HSLDS隔离器的谐振幅度小于线性隔离器。所提出的 HSLDS 隔振器可以实现比线性隔振器更好的隔振性能，尤其是在低频范围内。