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<p>Compressed springs and Euler buckled struts are widely used in the design of quasi-zero-stiffness (QZS) passive vibration isolators. However, most existing vibration isolators only focus on single-axis vibration isolation and suffer from issues such as a relatively high natural frequency. This paper proposes a six-degrees-of-freedom (DOF) QZS passive vibration isolator based on compressed springs and Euler buckled struts. It consists of four oblique springs, four vertical springs, and four Euler buckled struts. By analyzing the characteristics of compressed springs and Euler buckled struts, the QZS isolation principle of the vibration isolator is studied. Furthermore, based on the multi-objective sunflower optimization algorithm, the optimal parameters of the vibration isolator are obtained. Using optimized parameters, a six-DOF QZS passive vibration isolator with low natural frequencies has been obtained. Simulation and experiments are arranged by exciters in six directions, demonstrating the vibration isolator's excellent performance.</p>

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Design and experiments of a six-degree-of-freedom quasi-zero-stiffness passive vibration isolator based on compressed springs and Euler buckled struts

  • 期刊论文

  • 发表日期：

    2025年2月20日

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  • Bohan Shen,
  • Qi Chen,
  • Tao Song,
  • Wen He

摘要

Compressed springs and Euler buckled struts are widely used in the design of quasi-zero-stiffness (QZS) passive vibration isolators. However, most existing vibration isolators only focus on single-axis vibration isolation and suffer from issues such as a relatively high natural frequency. This paper proposes a six-degrees-of-freedom (DOF) QZS passive vibration isolator based on compressed springs and Euler buckled struts. It consists of four oblique springs, four vertical springs, and four Euler buckled struts. By analyzing the characteristics of compressed springs and Euler buckled struts, the QZS isolation principle of the vibration isolator is studied. Furthermore, based on the multi-objective sunflower optimization algorithm, the optimal parameters of the vibration isolator are obtained. Using optimized parameters, a six-DOF QZS passive vibration isolator with low natural frequencies has been obtained. Simulation and experiments are arranged by exciters in six directions, demonstrating the vibration isolator's excellent performance.