复杂结构内爆炸冲击波传播的大规模计算方法研究  

Study on Large Scale Calculation Method of Explosive Shock Wave Propagation in Complex Structure

作　　者：王成[1] 王雪桃 李涛[1] 张志刚 孙伟福 WANG Cheng;WANG Xuetao;LI Tao;ZHANG Zhigang;SUN Weifu(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Chongqing Research Institute,China Coal Research Institute,Chongqing 400039,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing 400039,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]中煤科工集团重庆研究院有限公司,重庆400039 [3]煤矿灾害防控全国重点实验室,重庆400039

出　　处：《北京理工大学学报》2024年第1期39-50,共12页Transactions of Beijing Institute of Technology

摘　　要：为研究爆炸冲击波在矿井巷道等复杂地下密闭空间内的传播过程及衰减规律,提出了一种基于数据流的分块续算方法.该方法解决了计算资源的大量浪费问题,实现了大尺寸复杂地下密闭空间内冲击波传播的大规模、高效率、高精度数值模拟.方形坑道内爆过程的数值结果与实验结果基本一致,证明了该计算方法的准确性.标准模型算例全尺寸计算与分块续算数值模拟结果的误差在0.33%以内,且续算方法在给定算例下相比普通全尺寸计算节约了88.68%的计算核时,证明该方法不仅能保证计算过程的准确性,而且还极大地提高了计算效率.同时,对一个包含长方体型工房和圆柱形分叉泄压洞的大尺寸复杂结构内的爆炸问题进行了数值模拟,结果表明:冲击波超压在泄压洞内是以波动衰减的趋势逐渐减小的,且其衰减速度比在自由场的小;T型分流时管道间采用直角交汇或缩小管道直径在一定程度上有利于冲击波超压的衰减.数值模拟结果表明,基于数据流的分块续算方法可用于地下空间等大尺度复杂结构防爆抗爆设计的理论指导.In order to study the propagation process and attenuation law of explosion shock wave in complex underground confined space such as mine tunnel,a block continuation calculation method based on data flow was proposed.This method solved the problem of huge waste of computational resources and realized large-scale,high-efficiency and high-precision numerical simulation of shock wave propagation in large-size complex underground confined spaces.The numerical results of the implosion process in the square trench were basically consistent with the experimental results,which proved the accuracy of the calculation method.The error between the full-scale calculation of the standard model case and the block continuation numerical simulation was within 0.33%,and the continuation method saved 88.68%of the computational core time compared with the ordinary full-scale calculation for a given case,which proved that the method not only ensured the accuracy of the calculation process,but also greatly improved the computational efficiency.At the same time,the explosion of a large complex structure containing a rectangular room and a cylindrical bifurcated pressure relief cavity was numerically simulated.Simulation results show that:shock wave overpressure in the pressure relief cavity decreased gradually with a trend of fluctuating decline,and its decay rate was smaller than that in the free field;T-shaped manifold with right-angle intersection between pipes or reduced diameter of the pipe was to a certain extent con-ducive to the attenuation of shock wave overpressure.Numerical simulation results show that the data flow-based block continuation calculation method can be used for theoretical guidance of explosion-proof and blast-resistant design of large scale complex structures such as underground spaces.

关 键 词：爆炸冲击波 复杂结构 数值模拟 分块续算 

分 类 号：O382.1[理学—流体力学]