中北大学学报（自然科学版）2024，Vol.45Issue(4)：496-502,7.DOI:10.3969/j.issn.1673-3193.2024.04.011
高过载信号的脉宽对泡沫铝缓冲效率的影响
Influence of Pulse Width of High Overload Signal on Buffering Efficiency of Foam Aluminum
王海宾 1范锦彪 1王燕1
作者信息
- 1. 中北大学 电气与控制工程学院,山西 太原 030051
- 折叠
摘要
Abstract
Research on the buffering protection of missile borne instruments under impact loads has received much attention.Aiming at the problem that the pulse width of high overload signal affects the cushioning efficiency of the cushioning material foam aluminum in live ammunition test,a research method of cushioning efficiency based on air gun test was proposed.The buffer model of the buffer test device was simplified to a single degree of freedom buffer model,and the stress-strain curve of foam aluminum under the high overload signal buffer compression was analyzed and established.It is found that the pulse width of the high overload signal affects the stress and buffer efficiency of the plastic platform area by affecting the strain rate of the high-density foam aluminum,while the buffer efficiency of low-density foam aluminum is basically not affected by the change of pulse width.The research results show that when the amplitude of high overload signal is about 20 000g,the pulse width decreases by 111 µs,the stress in 1.55 g/cm3 foam aluminum plastic platform area increases by about 15 MPa,and the buffer effi-ciency decreases by about 5.97%;The amplitude of 0.5 g/cm3 foam aluminum at high overload signal is the same,the pulse width decreases by 126 µs,and the stress and buffer efficiency in plastic platform area remain basically unchanged.关键词
泡沫铝/缓冲效率/空气炮/高过载/弹载仪器Key words
foam aluminum/buffer efficiency/air cannon/high overload/missile borne instruments分类
通用工业技术引用本文复制引用
王海宾,范锦彪,王燕..高过载信号的脉宽对泡沫铝缓冲效率的影响[J].中北大学学报（自然科学版）,2024,45(4):496-502,7.
