基于遗传算法的箱型结构内爆壁面超压重构方法研究  

Overpressure Reconstruction Method of Implosion Wall of Box-Type Structure Based on Genetic Algorithm

作　　者：崔瑞杰 王长利[2] 王文廉[3] 吴郑浩 杨丽丽[1] 王玉[1] CUI Ruijie;WANG Changli;WANG Wenlian;WU Zhenghao;YANG Lili;WANG Yu(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China;Northwest Institute of Nuclear Technology,Xi’an 710024,China;Key Laboratory of Instrument Science and Dynamic Testing,Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,太原030051 [2]西北核技术研究所,西安710024 [3]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《现代应用物理》2024年第6期187-194,共8页Modern Applied Physics

基　　金：中北大学重点实验室开放研究基金资助项目(DXMBJJ2024-04)。

摘　　要：密闭空间爆炸所导致的壁面超压是设计结构抗爆的重要参数之一,但爆炸冲击波测试试验因成本高、布线困难等原因,造成可获得壁面有效测点相对较少,故研究使用壁面较少测点重构壁面全部测点信息具有重要意义。采用少量测点的初到峰值超压结合壁面反射公式,通过遗传算法求得箱型密闭空间内爆心的等效位置和爆炸当量,将其作为中间量,并结合镜像法和非线性叠加处理多波耦合效应(linear and acoustic model for the boundary)的方法,对壁面冲击波超压进行重构,从而求得壁面上各点的超压分布。表明,遗传算法得到的爆心位置和当量的最大相对偏差分别为3.64%和4.44%,箱型密闭空间壁面上测点的最大超压预测值与仿真值的最大相对偏差为17.6%。该模型预测内爆炸壁面冲击波测点的最大超压峰值与仿真结果较为吻合,验证了该方法的有效性。The wall overpressure caused by an explosion in a confined space is a key parameter in designing structures to withstand blast loads.However,due to high costs and difficulties in instrumentation,there are relatively few available measurement points for wall overpressure during blast wave testing.Therefore,reconstructing the full distribution of wall overpressure with a limited number of measurement points is of significant importance.In this paper,the initial peak overpressure measured at a few points on the wall,combined with the wall reflection formula,is used to determine the equivalent position and explosive yield of the explosion's center by a genetic algorithm.This is treated as an intermediate variable,and the linear and acoustic model for the boundary,incorporating method of image and nonlinear superposition to account for multi-wave coupling effects,is applied to reconstruct the wall overpressure distribution.Calculation results show that the maximum relative deviation in the explosion center location and yield determined by the genetic algorithm are 3.64%and 4.44%,respectively.The maximum relative deviation between the predicted and simulated peak overpressure at the wall measurement points is 17.6%.The model's prediction of the peak overpressure at the explosion wall measurement points is in good agreement with the simulation results,validating the effectiveness of this approach.

关 键 词：密闭空间 冲击波超压 遗传算法 超压重构 镜像法 

分 类 号：O383[理学—流体力学] TP391[理学—力学]