基于高斯多峰法的密闭空间爆炸特性曲线拟合

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摘要可燃气体爆炸压力—时间曲线是爆炸特性研究中极其重要的一条曲线，其反映了可燃气体爆炸过程中的真实压力变化，对该曲线的拟合将有助于更加细致、量化地研究可燃气体爆炸的主要特性。以密闭空间可燃气体爆炸试验为基础，采用高斯多峰拟合的方法对密闭空间的爆炸压力特性曲线进行了拟合，并分析了拟合曲线与爆炸过程的对应关系。结果表明：高斯多峰拟合法能得到比较精确的密闭空间爆炸超压函数表达式；拟合峰数目越多，拟合结果越精确，但拟合效率降低，需要选择一个合适的拟合峰数；拟合结果反应了测点的压力波动趋势，采用脉冲叠加的方式可以模拟出接近实际爆炸的超压过程；采用该拟合简化模型可以快速地估计出整个爆炸的总冲量。

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	谢威
	蒋新生
	徐建楠
	周毅
	王冬

关键词 ：密闭空间；爆炸；特性曲线, 拟合

Abstract：The pressure-time curve of combustible gas explosion is an extremely important curve in the study of the explosion characteristics, which reflects the real pressure change during the combustible gas explosion.The fitting of the curve will help to study the key features of combustible gas explosion more meticulously and quantitatively.Based on the experiment of oil and gas explosion in a confined space, the pressure characteristic curve of explosion in the confined space was fitted by the Gaussian multi-peak method, and the correspondence relationship between the fitting curve and the explosion process was analyzed.The results show that: the Gaussian multi-peak fitting method can obtain a more accurate expression of overpressure function in confined space explosion.And the more the number of fitting peaks, the more accurate the fitting result, but the lower the fitting efficiency.And the fitting results reflect the trend of pressure fluctuation at the measuring point and the pulse superposition method can be used to simulate the overpressure process very close to the actual explosion.And using this simplified fitting model can quickly estimate the total impulse of the whole explosion.

Key words： confined space；explosion characteristic curve fit

收稿日期: 2017-11-01 出版日期: 2018-12-15

引用本文:

谢威，蒋新生，徐建楠，周毅，王冬. 基于高斯多峰法的密闭空间爆炸特性曲线拟合[J]. 振动与冲击, 2018, 37(24): 201-207.
XIE Wei,JIANG Xinsheng,XU Jiannan,ZHOU Yi,WANG Dong. Fitting of characteristic curves of explosion in a confined space using a Gaussian multi-peak method. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(24): 201-207.

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http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I24/201

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