Fitting of characteristic curves of explosion in a confined space using a Gaussian&nbsp; multi-peak method

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (24) : 201-207.

Fitting of characteristic curves of explosion in a confined space using a Gaussian multi-peak method

XIE Wei,JIANG Xinsheng,XU Jiannan,ZHOU Yi,WANG Dong

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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

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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[J]. Journal of Vibration and Shock, 2018, 37(24): 201-207

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