Numerical Simulation of the Interactions between Hyperpressure Waterjet and Explosive
-
摘要: 利用LS-DYNA3D软件并采用Lagrange算法,对500 m/s的高速水射流与凝聚炸药的相互作用过程进行了数值模拟;对不同时刻凝聚炸药中的压力分布以及不同径向、轴向处的压力历史进行了分析;确定了所选凝聚炸药的声速。数值模拟的结果与理论分析的结果之间具有很好的一致性。模拟结果表明,在高速水射流与凝聚炸药相互作用的过程中,凝聚炸药药柱截面上的压力随径向距离的增加而降低;药柱中的最大压力出现在水射流头部附近或水射流头部的前方。Abstract: The interactions between the high-speed waterjet of 500 m/s and the condensed explosive have been simulated by LS-DYNA3D code with Lagrange method. The pressure distributions in the explosive at different times and the pressure histories at different elements of the explosive have been calculated. On the basis of numerical simulation, the sound speeds of the explosive have been determined. The numerical simulation results accord with the theoretical analysis. During the process of the interaction between the high-speed waterjet and the condensed explosive, the numerical simulation results show that the pressure decreases with the increase in the radial distance of the element and the maximum pressure occurs nearby or in front of the head of the penetrating waterjet.
-
Key words:
- numerical simulation /
- high-speed waterjet /
- pressure distribution /
- pressure history
-
Wang L L. The Foundation of Stress Wave [M]. Beijing: National Defense Industry Press, 1986. 18-24. (in Chinese) 王礼立. 应力波基础[M]. 北京: 国防工业出版社, 1986. 18-24. Tikhomirov R A. High-Pressure Jet Cutting [M]. New York: ASME, 1992. 47-49. Xue S X. The Technology and Application of High-Pressure Waterjet [M]. Beijing: Mechanical Industry Press, 1998. 32-34. (in Chinese) 薛胜雄. 高压水射流技术与应用[M]. 北京: 机械工业出版社, 1998. 32-34. Jiang W C, Ding G Y. The Arithmetical Foundation and Applied Method of ANSYS/LS-DYNA Code[Z]. Beijing: ANSYS/LS-DYNA Technological Instructed Center, the Department of Mechanical and Electrical Engineering, Beijing Institute of Technology, 1998. 149-151. (in Chinese) 蒋维城, 丁刚毅. ANSYS/LS-DYNA程序算法基础和使用方法 [Z]. 北京: 北京理工大学机电工程系 ANSYS/LS-DYNA中国技术支持中心, 1998. 149-151.
点击查看大图
计量
- 文章访问数: 14447
- HTML全文浏览量: 792
- PDF下载量: 1147