摘要
在理论分析刚形体垂直撞水动力特性的基础上,分别推导出基于von Karman理论和通用Wagner理论的圆球底返回舱撞水冲击过载公式,然后借助ANSYS/LS-DYNA动力显式程序中ALE算法的优势,进行返回舱海面垂直撞水动力数值仿真;针对数值仿真结果和理论分析预报结果的比较分析来验证数值仿真的可行性,同时给出数值计算弹性体模型垂直撞水的撞水冲击过载;结果表明:采用ANSYS/LS-DYNA的ALE算法可以有效地数值模拟返回舱撞水动力特性,为进一步控制返回舱海面回收以及数值分析撞水动力特性提供有力的技术支持,且大大节约了试验经费。
In order to investigate numerical simulation of a recovery module＇s dynamic characeristic during its water impact,von Karman-type and general Wagner-type overload formula are given using rigid pellet water impacting theory.The numerical solution method of this study is based on the explicit nonlinear dynamic finite element code-ANSYS/LS-DYNA.It particularly focuses on the strategy of the application of the Eulerian-Lagrangian penalty coupling algorithm and multi-material Eulerian formulation.And a flexible model which floor is flexible structure combined with the upper rigid structure is adopted to compare the resultant numerical solutions and the theoretical solutions.Finally,conclusions are showed that water impacting dynamic analysis of recovery module using ANSYS/LS-DYNA code are feasible.It is helpful to simulate recovery module water impacting with a pitch angle and actuate control its water impacting practically.
出处
《计算机测量与控制》
CSCD
北大核心
2010年第10期2382-2384,共3页
Computer Measurement &Control
