刚性防爆墙后冲击波峰值超压峰值计算方法研究  

A calculation method of the peak of peak overpressure of shock wave behind rigid anti-blast wall

作　　者：邱玖禄 高家豪 王澍霏 张柏华[1] 钟巍[1] QIU Jiulu;GAO Jiahao;WANG Shufei;ZHANG Baihua;ZHONG Wei(National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应全国重点实验室,西安710024

出　　处：《兵器装备工程学报》2025年第3期101-111,共11页Journal of Ordnance Equipment Engineering

摘　　要：为研究刚性防爆墙墙后超压分布特性,通过量纲分析方法,推导了墙后峰值超压关于炸药参数、空气初始参数和尺寸参数的函数关系,采用AUTODYN软件计算了2个绕射波和单个绕射波情况下爆炸冲击波与防爆墙作用过程以及墙后测点压力峰值特性。分析和计算结果表明,墙后测点峰值超压是关于6个无量纲量的函数,受到地面的影响,墙后测点的压力曲线会出现1~4个峰值,峰值数目与测点所处位置相关。结合量纲分析结果和等效路径思想,建立了2类情况下墙后测点首峰峰值超压的计算方法。进一步引入线性叠加和平方反比关系2条假设,在镜像爆源法基础上提出了墙后测点次峰峰值超压的计算方法。实验和数值模拟验证了该计算方法的准确性和适用性,与实验结果相比,首峰和次峰计算方法获取结果的相对误差分别为11.8%和4.2%。To study the distribution characteristics of overpressure behind a rigid anti-blast wall,a dimensional analysis method was used to derive the functional relationship between the peak overpressure behind the wall and the explosive parameters,initial air parameters,and size parameters.The AUTODYN software was used to calculate the interaction process between the explosion shock wave and the anti-blast wall under two diffracted waves and a single diffracted wave,as well as the peak pressure characteristics at the measuring point behind the wall.The analysis and calculation results indicate that the peak overpressure at the measuring point behind the wall is a function of six dimensionless variables.Due to the influence of the ground,the pressure curve at the measuring point behind the wall will have 1-4 peaks,and the number of peaks is related to the location of the measuring point.A calculation method for the peak overpressure of the first peak at the measuring point behind the wall was established based on the results of dimensional analysis and the idea of equivalent path.Further introducing the assumptions of linear superposition and inverse square relationship,a calculation method for secondary peak to peak overpressure at measuring points behind walls is proposed based on the mirror explosion source method.The accuracy and applicability of the calculation method were verified through experiments and numerical simulations.Compared with the experimental results,the relative errors of the first peak and second peak calculation methods were 11.8%and 4.2%,respectively.

关 键 词：防爆墙 绕射 量纲分析 等效路径 

分 类 号：O383.2[理学—流体力学]