返回舱着陆姿态和动力响应的DEM-FEM耦合分析

材料缓冲性能，（E-mail）shaominliang@mail.dlut.edu.cn

通信作者： 季顺迎（1972—），男，河北武邑人，教授，博导，博士，研究方向为计算颗粒力学及工程应用，（E-mail）jisy@dlut.edu.cn

DEM-FEM coupling analysis on landing attitude and dynamic response of re-entry capsule

LIANG Shaomin1， WANG Yongbin2， JI Shunying1

（1. State Key Laboratory of Structural Analysis of Industrial Equipment， Dalian University of Technology， Dalian 116024， Liaoning， China; 2. Beijing Institute of Space Mechanics & Electricity， Beijing 100094， China）

Abstract：

As to the safety landing problem of the re-entry capsule， the numerical analysis on the dynamic characteristics of the re-entry capsule during re-entry and landing is carried out using coupling method of land particle discrete element model （DEM） and re-entry capsule finite element model （FEM）. The dynamic characteristics of the re-entry capsule landing are compared with the experimental results， and the correctness of the computational results are verified. The structure stress distribution of the re-entry capsule landing vertical and with oblique postures are discussed， and the buffering effect of surface granules on the re-entry capsule structure is discussed in the terms of impact energy. The main factors affecting the rebound response of the re-entry capsule are analyzed， and the corresponding improvement methods are proposed. The results show that the land surface granules are the main part of the impact energy absorption of the re-entry capsule， and the proportion of energy absorbed by land surface granules is more significant when landing in inclined direction; when the friction factor of land surface granules is smaller and the mass of re-entry capsule is larger， the rebound velocity of the re-entry capsule is relatively smaller.

Key words：

re-entry capsule; landing attitude; dynamic response; energy distribution; discrete element; finite element; model coupling

推荐访问： 耦合 着陆 响应 姿态 返回舱

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