Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (4): 106-110.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Analysis Methods of Projection Velocity and Flight Trajectory of Explosion Fragments

Zhang Xin-mei  Chen Guo-hua   

  1. Institute of Chemical Process Machinery and Safety Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-11-08 Revised:2008-01-25 Online:2009-04-25 Published:2009-04-25
  • Contact: 陈国华（1967-），男，教授，博士生导师，主要从事工业安全与风险评价技术及管理信息系统、过程装备可靠性与风险评价研究．E-mail：mmghchen@scut．edu．cn E-mail:xmei．zh@mail．scut．edu．cn
  • About author:张新梅（1980-），女，博士生，主要从事过程装备安全可靠性及风险评价技术研究．
  • Supported by:

    国家“十一五”科技支撑计划项目（2007BAK22804）;爆炸科学与技术国家重点实验室（北京理工大学）开放基金项目（KFJJ08-13）

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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