磁力预紧缓冲器的力学特性及缓冲性能研究

曾泽璀1,2,张磊1,2,闫明1,张春辉2

振动与冲击 ›› 2021, Vol. 40 ›› Issue (12) : 97-106.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (12) : 97-106.
论文

磁力预紧缓冲器的力学特性及缓冲性能研究

  • 曾泽璀1,2,张磊1,2,闫明1,张春辉2
作者信息 +

A study the mechanical properties and shock isolation performance of a magnetic preload shock isolator

  • ZENG Zecui1,2,ZHANG Lei1,2,YAN Ming1,ZHANG Chunhui2
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文章历史 +

摘要

在冲击作用下,传统预紧缓冲器能够为设备提供良好的缓冲效果,但是当外界冲击大于缓冲器预紧力并发生变形时,会产生大于预紧力的冲击力响应,从而影响缓冲性能。为降低预紧缓冲器的冲击力响应,提高缓冲性能,提出一种磁力预紧缓冲器。利用谐波平衡法对磁力预紧缓冲器的非线性微分方程求解,获得该系统的方程解;通过数值计算获得磁力预紧缓冲器的冲击响应规律,将磁力预紧缓冲器与传统预紧缓冲器的冲击响应进行对比分析。上述计算结果说明,在具有相同预紧力的情况下,磁力预紧缓冲器的冲击响应受到磁力预紧力和线性刚度的影响;与其它预紧缓冲器相比,通过选择合适线性刚度的磁力预紧缓冲器,传递力响应以及速度响应都能够明显地降低,而位移响应基本保持不变。利用跌落冲击机对原理样机进行冲击试验,试验结果与理论结果基本一致,验证理论计算结果的准确性。

Abstract

Under the shock, a traditional preload isolator can provide a good isolation performance for device.When the external shock is greater than the preload force, the force response greater than the preload force would be generated.In order to reduce the shock response of a preload isolator and improve the isolation performance of the preload isolator, a magnetic preload isolator was proposed in this paper.Firstly, the nonlinear differential equation of the magnetic preload isolator was solved by the harmonic balance method to obtain the force transmission characteristics of the system.Then, the shock response law of the magnetic preload isolator was obtained by numerical calculation.Finally, the magnetic preload isolator was compared with the shock response of the conventional preload isolator.The above calculation results show that the shock response of the magnetic preload isolator was affected by the magnetic preload and the linear stiffness; therefore, by selecting the appropriate linear stiffness, both the transmitted force response and the speed response can be significantly reduced compared to the traditional preload isolator, but the displacement response remains essentially unchanged.

关键词

预紧缓冲器 / 冲击力响应 / 谐波平衡法 / 非线性

Key words

preload Isolator / shock response / harmonic balance method / nonlinearity

引用本文

导出引用
曾泽璀1,2,张磊1,2,闫明1,张春辉2. 磁力预紧缓冲器的力学特性及缓冲性能研究[J]. 振动与冲击, 2021, 40(12): 97-106
ZENG Zecui1,2,ZHANG Lei1,2,YAN Ming1,ZHANG Chunhui2. A study the mechanical properties and shock isolation performance of a magnetic preload shock isolator[J]. Journal of Vibration and Shock, 2021, 40(12): 97-106

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