Design and analysis of a compliant buffer with symmetric layout and large travel

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (22) : 42-50.

LIU Hua，ZHAI Xiaofei，ZHANG Xiao，PENG Zhiran，YANG Fan

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Abstract

Since most of conventional buffering mechanisms suffer from relatively complex and bulky structure, this paper proposes a novel large travel cradle-buffer integrated-designed compliant buffer with vertical straight leaf spring and symmetric layout aiming to meet the symmetric buffering and high out-of-plane payload requirements of the small calibrator railgun. The key parameters such as stiffness, travel and out-of-plane payload of the linear guide compliant mechanism (LGCM) is analyzed. The analytical model is confirmed by finite element simulation and experiments. It is noted that the developed LGCM is capable of ±7mm buffering traveling with an 892.82N/mm working stiffness, and the out-of-plane payload of the LGCM is greater than 12400N. Furthermore, dynamic firing tests are carried out to investigate the buffering characteristics of the symmetric compliant buffer (SCB). The experimental results show that the maximum recoil displacement of the SCB is 5.12mm and the maximum buffered recoil force is about 4743.7N, which reduce the recoil shock dramatically and meet the buffer design goal.
Key words: buffering mechanism; linear-guided compliant mechanism（LGCM）; symmetric layout; stiffness analysis; transmitted shock;

Key words

buffering mechanism / linear-guided compliant mechanism（LGCM） / symmetric layout / stiffness analysis / transmitted shock;

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LIU Hua，ZHAI Xiaofei，ZHANG Xiao，PENG Zhiran，YANG Fan. Design and analysis of a compliant buffer with symmetric layout and large travel[J]. Journal of Vibration and Shock, 2022, 41(22): 42-50

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