关键词: 爆炸碎片, 抛射速度, 飞行轨迹, 多米诺效应, 多方过程, 边界条件

Abstract:

Clear projection velocity and flight trajectory of explosion fragments in chemical industry parks help to reveal the Domino effect caused by the fragments. In this paper, a formula is deduced to calculate the initial projection velocity of the fragments according to the theory of explosion expansion work and the state equation of polytropic process. The acceleration equations of flying fragments are constructed according to the variations of motion direction and force direction of the fragments. Moreover, the methods to analyze the flight trajectory and projection velocity of explosion fragments are proposed by solving the acceleration equations as well as by analyzing the boundary conditions. A case study is finally performed and the results indicate that the proposed formula of initial projection velocity and the analysis method of flight trajectory well reflect the basic projection laws of explosion fragments, and are both theoretically significant and practically valuable for the analyses of accident consequences and the Domino effect.

Key words: explosion fragment, projection velocity, flight trajectory, Domino effect, polytropic process, boundary condition