正方形截面长隧道内壁爆炸超压分布规律

Distribution Law of Explosion Overpressure on Walls of Long Square-Section Tunnel

以爆炸力学为理论基础,利用有限元软件ANSYS/LS-DYNA,定性地研究了正方形截面长隧道内爆炸引起的内壁上超压分布规律.按其工作原理,预先应用ANSYS/LS-DYNA软件建立宽、高均为2 m的正方形截面长隧道模型,在隧道不同结点处分别布置基准药量W0=0.205 kg的炸药,采集由其爆炸而引起的内壁各结点上超压峰值和超压到达时间的数据,并且借助于绘图软件origin制成包络图,研究了隧道内壁超压的分布规律.研究结果为工程结构抗爆设计提供了参考,因而具有很好的工程应用前景.

Based on the theory of explosion mechanics and by means of the ANSYS/LS-DYNA software,the present paper sets a numerical analysis for the distribution law of overpressure on walls induced by an explosion in long square-section tunnel.According to its working principle,the ANSYS/LS-DYNA software is used to establish the models for a closed long square-section tunnels with the side length of 2 m.An explosive of the reference charge,W0=0.205 kg is set at each node of their inner spaces,and the data of the peak values and durations of overpressure on walls due to the explosion are collected and shown in a manner of the envelope diagram with the origin graph software.Then,the distribution laws of the induced overpressure on walls of the closed long square-section tunnel are analyzed.This paper summarizes some important conclusions,and also provides some advices for the anti-explosion engineering.Consequently,this will have a good prospect in engineering application.