| 摘要: |
| 为分析大型舱体返回入水时入水垂直速度等工况参数对其冲击特性的影响，提出一种基于任意拉格朗日欧拉法的舱体入水过程模拟方法，应用球底结构入水问题理论计算方法验证该模拟方法的有效性。通过对不同入水工况的有限元模拟，分析入水垂直速度和入水角度对冲击特性的影响。结果表明本文建立的舱体-流体有限元模型能够有效模拟舱体入水过程，舱体冲击加速度峰值与入水垂直速度成正比，舱体以一定角度入水能够降低入水过程的冲击加速度。研究结果可以为新型舱体的结构设计和入水冲击试验提供指导，从而减少试验次数，缩短开发周期。 |
| 关键词: 舱体 入水 任意拉格朗日欧拉法 冲击特性 |
| DOI： |
|
| 基金项目: |
|
| Analysis of Effects of Water Entry Condition Parameters on Impact Characteristics of Recovery Module |
| LI Jianyang,XING Wei,SONG Shipeng,ZHOU Yu,YU Minggen |
| (School of Non- Commissioned Officer, Space Engineering University;Beijing Special Engineering and Design Institute) |
| Abstract: |
| To analyze the effects of water entry condition parameters on impact characteristics of recovery module, this paper presents a method of water entry simulation based on Arbitrary Lagrange-Euler (ALE). The simulation method was validated by water entry theoretic analysis method of spherical-bottomed structures. The effects of water entry velocity and angle on impact characteristics were analyzed by finite element simulations under different conditions. The results show that the water entry process of recovery module can be simulated effectively by the FE model of module & fluid in this paper. The maximum impact acceleration of module is directly proportional to the entry velocity and the impact acceleration could be reduced when module entry water inclined. These results may provide guidance for the structures design of new module and water entry tests, thus reducing the number of tests and shortening the development cycle. |
| Key words: Recovery module Water entry Arbitrary Lagrange-Euler Impact characteristics |