摘要
利用有限元分析软件Ansys Workbench中的显示动力学模块,对井下巷道瓦斯爆炸时可移动式救生舱周围的冲击波进行了数值模拟。仿真以相同截面形状的实心救生舱体为研究对象,对明显的突出结构均不作简化,结合TNT当量法和流固耦合原理,获得了爆炸流场中更为准确的救生舱正面、侧面、顶面和背面的超压曲线。研究发现,在救生舱正面,防爆门的超压峰值明显高于前门板;在侧面和顶面,法兰与舱体的超压曲线相似;而前门系统与二者明显不同;在背面,逃生窗口与后门板的超压基本一致。结果表明,冲击波的分布与救生舱的表面形状有关,尤其迎爆面构件的外形对冲击波影响显著,存在突出结构时不能被忽略。研究结果为救生舱整体和关键部件的动态响应提供了理论支持。
In this paper,using Explicit Dynamics in finite element analysis software Ansys Workbench,numerical simulation was conducted for shock wave around coal mine refuge chamber in the gas explosion of under workings.By taking the solid refuge chamber with same section shape as the research object,without any simpification of the obvious convex structure,combining TNT equivalent method with fluid-solid theory,the simulation obtained more precise distribution curves of overpressure on the front,side,top and back surface of chamber.It is found that on the front surface,the peak overpressure value of the explosive door was significantly higher than that of fore end surface;on the side and top surface,the curves of overpressue on the flanges were similar with those on bulkhead,but obviously different from those on frontdoor system;on the back surface,the overpressure on the escape door is basically in accordance with that on the rear surface.The results show that the shock wave distribution is related with the surface shape of chamber,especially the structural componet close to the blast has a significant impact on it,which can not be simplified when there exists convex structrue.This research provides a theo-retical support for the dynamic response of the whole camber and the key components.
出处
《太原理工大学学报》
CAS
北大核心
2016年第5期613-616,共4页
Journal of Taiyuan University of Technology
基金
国家自然科学青年基金资助项目:井下救生设施结构安全研究及优化设计(51301117)
关键词
救生舱
爆炸冲击
超压
数值模拟
refuge chamber
blast shock
overpressure
numerial simulation
