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力学与实践 ›› 2013, Vol. 35 ›› Issue (4): 25-30,24.doi: 10.6052/1000-0879-13-077

• 应用研究 • 上一篇    下一篇

潜射导弹出水载荷数值算法研究

李国良1, 袁湘江1, 敖林2   

  1. 1. 中国航天空气动力技术研究院, 北京100074;
    2. 中国运载火箭技术研究院, 北京100076
  • 收稿日期:2013-03-07 修回日期:2013-05-24 出版日期:2013-08-08 发布日期:2013-08-26
  • 通讯作者: 李国良,E-mail:caaaliguoliang@sina.com E-mail:caaaliguoliang@sina.com

SIMULATION OF UNDER-WATER LAUNCHED MISSILE’S WATER-EXIT LOAD

LI Guoliang1, YUAN Xiangjiang1, AO Lin2   

  1. 1. China Academy of Aerospace Aerodynamics, Beijing 100074, China;
    2. China Academy of Launch Vehicle Technology, Beijing 100076, China
  • Received:2013-03-07 Revised:2013-05-24 Online:2013-08-08 Published:2013-08-26

摘要:

潜射导弹在水中航行时,表面被空泡包围,这就造成其出水时,带来较大的载荷冲击. 出水冲击载荷需要知道整个表面上的压力分布,但是这在工程实践中是不可能实现的. 本文采用有限元流固耦合仿真程序,对潜射导弹整个出水过程进行数值模拟. 根据数值计算结果,依据理论力学的基本原理,计算出潜射导弹所受到的冲击力与冲击力矩,利用NASTRAN 瞬态载荷解算器,计算出潜射导弹各截面最大响应弯矩. 结果表明,本文提出的方法能够对潜射导弹出水过程提供数值预测与安全评估.

关键词:

潜射导弹|出水冲击载荷|最大弯矩

Abstract:

The high-speed missile in water is wrapped by cavitations, which implies a heavy water-exit load. It is essential to obtain the pressure distribution as whole in order to compute the load. However, it is not possible in reality. In this paper, the water-exit process is simulated by the FEM (finite element method) liquid-solid coupling method. Based on some fundamentals of the theoretical mechanics, the impact and the impact moment are computed. Using NASTRAN, the maximum corresponding bending moments in all cross-sections are obtained. The results show that the computation in this paper can predict and assess the water-exit process of the vehicle.

Key words:

under-water launched missile|water-exit load|maximum bending moment

中图分类号: 

  • TJ762.4