飞船返回舱着水数值模拟研究  

On Numerical Simulation of Return Cabin Landing in Spacecraft

作　　者：李旦[1] 赵廷渝[1] 王永虎[1] LI Dan ZHAO Ting-yu WANG Yong-hu(College of Flight Technology,Civil Aviation Flight University of China,Guanghan 618307,China)

机构地区：[1]中国民用航空飞行学院飞行技术学院,四川广汉618307

出　　处：《西安航空学院学报》2017年第5期23-28,共6页Journal of Xi’an Aeronautical Institute

基　　金：国家自然科学基金民航联合研究基金项目(U1333133);四川省教育厅科研项目(16ZB030)

摘　　要：作为载人航天活动的最后步骤,飞船返回是否成功是载人航天任务成败的标志。基于显式积分有限元软件LS-DYNA与SPH(光滑粒子流体动力学)方法数值模拟返回舱着水冲击过程,首先建立返回舱垂直与倾斜18度两种工况的着水模型,计算处理得到返回舱着水速度、加速度、俯仰角与粒子有效应力云图等着水冲击响应参数,然后对比分析两种工况的计算结果,得出:当返回舱倾斜18度着水时,在冲击过程中返回舱加速度最大值明显减小,与垂直入水情况相比加速度减少60m/s2,返回舱运动加速度最大值受入水倾角影响较大,返回舱倾角越大,加速度最大值越小。这一结论为设计载人航天返回舱着水入水倾角方案提供参考。As the final step of the manned space flight, the return process of the spacecraft is the final sign of the success or failure of the manned space mission. SPH（Smooth Particle Fluid Dynamics）method based on exphcit integral finite element software LS-DYNA is used to simulate the impact process of water return in the return tank. First of all, the water model is established under the two working conditions of the return tank being vertical and inclined 18 degrees,and water impact response parameters are calculated, such as water speed, acceleration, angle of pitch, and effective stress nephogram of particles. The comparison of the results under the two working conditions indicates that：when the return tank is tilted by 18 degrees,the maximum value of the velocity is obviously reduced,and the acceleration is reduced by 60m/s2. The maximum value of the acceleration of the return tank is greatly affected by the inclination angle of the incoming water. The larger the inclination angle of the return tank is, the smaller the acceleration is. It is helpful to study the dynamic characteristics of the water process under different working conditions in the return cabin,which will provide some guidance for improving the safety performance of the return tank.

关 键 词：载人航天 SPH方法 返回舱着水 入水倾角 

分 类 号：V525[航空宇航科学与技术—人机与环境工程]