自耗散结构的管道中爆炸冲击波传播衰减规律研究

Explosive Shock Wave Propagation Laws in Pipes with Self-dissipative Structures

为实现管道内爆炸冲击波的快速衰减,文章提出了一种具有自耗散结构的管道,利用LS-DYNA有限元软件进行管道内爆炸冲击波传播的仿真模拟,获得爆炸冲击波在长直管道和具有自耗散结构管道内的传播规律,分析了自耗散结构实现冲击波快速衰减的作用机理,并对自耗散结构加快冲击波衰减的经济性和功能性进行评价。结果表明:相比长直管道,具有自耗散结构的管道内冲击波的超压峰值随传播距离显著降低,经过一倍管道直径,超压峰值衰减率超过95%,得到具有自耗散结构的管道具备更好的经济效益。

To achieve rapid attenuation of the explosion shock wave in the pipeline,this paper proposes a self-dissipative structure of the pipeline,the use of LS-DYNA finite element software for simulation of the propagation of the explosion shock wave in the pipeline,to obtain the propagation of the explosion shock wave in the long straight pipeline and the pipeline with a self-dissipative structure of the propagation of the law,analysis of the self-dissipative structure of the shock wave to achieve the role of the rapid attenuation of the mechanism,and to accelerate the self-dissipative structure of the economic and functionality of the self-dissipative structure to accelerate the attenuation of the shock wave is evaluated.The results show that:compared with the long straight pipeline,the peak overpressure of the shock wave in the pipeline with self-dissipative structure decreases significantly with the propagation distance,and after doubling the diameter of the pipeline,the attenuation rate of the peak overpressure is more than 95%,so that the pipeline with self-dissipative structure has a better economic benefit.