摘要
为了研究瓦斯爆炸对地下巷道壁面结构的冲击作用规律以及瓦斯爆炸与巷道壁面耦合效应,利用有限元分析软件ANSYS/LS-DYNA建立管道物理模型,数值模拟了耦合和解耦合条件下管道内瓦斯爆炸压力变化、压力等值线分布、能量变化及管道等效应力的变化情况.模拟结果表明:(1)耦合效应下对爆炸流场内部的冲击超压大小的影响基本上可以忽略;(2)解耦合条件下,管道的应力等压线分布呈现较规则同心环,而耦合条件下,在整个传播过程管道内等压线分布处于紊乱状态,可知在耦合效应下瓦斯爆炸流场在巷道中会变得更加复杂;(3)等效应力分布导致管道多次轻微变形,但第1次变形破坏最为有效,可知瓦斯爆炸时应力波是随着时间的推移逐渐减少.研究结果能够对地下巷道的设计提供一定的理论指导,对减小瓦斯爆炸的损失也具有重要的现实意义.
In order to study the impact of gas explosion on the wall structure of underground roadway and the coupling effect of gas explosion and roadway wall surface,the tube physical model was established by finite element analysis software ANSYS/LS-DYNA,the variation of the gas explosion pressure,the distribution of pressure contours,the change of energy and the equivalent stress of the tube under the coupling and decoupling conditions were numerically simulated. The simulation results show that:( 1) the effect of the coupling effect on the magnitude of the impact overpressure inside the blast flow field is basically negligible;( 2) under the condition of uncoupling,the stress distribution of the tube is regular concentric ring,and the coupling condition,the stress distribution of the tube is disorder. It can be seen that the gas explosion flow field become more complicated under the coupling effect;( 3) the equivalent stress distribution leads to a slight deformation of the tube several times,but the first deformation of the most effective. It can be seen that the stress wave is gradually reduced with time as the gas explodes. The research results provide some theoretical guidance for the design of underground roadway and reduce the loss of gas explosion. It has important practical significance.
作者
朱邵飞
叶青
柳伟
贾真真
杨卓华
Zhu Shaofei;Ye Qing;Liu Wei;Jia Zhenzhen;Yang Zhuohua(School of Resource,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2019年第4期17-23,共7页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金资助项目(51704111
51374003
51434006)
湖南省自然科学基金资助项目(2016JJ6038)
湖南省教育厅项目资助(E51523)
关键词
瓦斯爆炸
管道
耦合效应
数值模拟
gas explosion
tube
coupling effect
numerical simulation
