一种小比距离爆炸下的冲量测量技术研究

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摘要为可靠得到小比距离爆炸下的冲击波冲量大小，建立了一种基于塑性膜片中心位移变化的测量方法。使用有限元软件LS-DYNA，通过改变塑性膜片的材料、径厚比及爆炸比距离等参数，对爆炸冲击波作用下膜片的动态响应进行数值模拟研究。利用量纲分析的手段，得到了比距离小于0.1时爆炸冲击波比冲量与塑性膜片中心位移的经验计算模型,并通过考核试验对该模型的准确性进行了验证。结果表明，该模型得到的计算值与试验值的平均误差为8.8%，可以满足工程应用的要求。

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	殷文骏
	刘文祥
	胡华权
	师莹菊
	杨军
	王昭

关键词 ：塑性膜片, 冲击波冲量, 中心位移

Abstract：In order to correctly measure impulse of shock wave under explosion at a small scaled distance, a measuring method based on central displacement variation of a plastic diaphragm was proposed. Using the finite element software LS-DYNA, a numerical model was built to simulate dynamic responses of plastic diaphragm under action of explosion shock wave considering influences of plastic diaphragm’s material and ratio of diameter to thickness, explosion scaled distance and so on. The dimensional analysis was used to build an empirical model to calculate scaled impulse of explosion shock wave and central displacement of plastic diaphragm during the scaled distance being less than 0.1. The accuracy of the model was verified with check tests. Results showed that the mean error between the value calculated with the model and test one is 8.8 % to meet requirements of engineering applications.

Key words： plastic diaphragm impulse of shock wave central displacement

收稿日期: 2019-05-20 出版日期: 2020-09-28

引用本文:

殷文骏,刘文祥,胡华权,师莹菊,杨军,王昭. 一种小比距离爆炸下的冲量测量技术研究[J]. 振动与冲击, 2020, 39(19): 130-134.
YIN Wenjun, LIU Wenxiang, HU Huaquan, SHI Yingju, YANG Jun, WANG Zhao. Impulse measuring technique under explosion at a small scaled distance. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(19): 130-134.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I19/130

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