摘要
在火星探测任务中,盘缝带伞对航天器在低密度大气条件下的减速起到了重要作用。文章采用ProE软件进行几何建模;利用Hyperwork软件进行伞衣有限元建模及前处理;利用LS-DYNA软件的任意拉格朗日–欧拉方法着重研究了径向加强带细化结构对于盘缝带伞无限质量下,流固耦合仿真结果的影响。通过仿真研究发现,在考虑径向加强带细化结构后,缩比的盘缝带伞的阻力系数值与实际试验结果相近,伞衣外形、伞衣摆角与实际试验结果更为接近。此外,考虑径向加强带后,伞衣应力的仿真结果也与真实物理现象更为贴近。文章的建模方法及仿真结果对盘缝带伞的设计与仿真验证具有一定的参考价值。
In the Mars exploration mission, Disk-Gap-Band（DGB） parachute plays an important role in decreasing spacecraft＇s speed under low density atmosphere conditions. In this paper, Pro E software is used to model the geometry of the canopy while Hyperwork software is used for its finite element modeling and pre-processing, and the effect of the radial reinforcement detailed structure of the DGB parachute on the wind tunnel simulation is analyzed by Arbitrary Lagrange Euler（ALE） method of the LS-DYNA software. The simulation results show that when considering the radial reinforcement detailed structure, drag coefficient of the scale canopy is closed to the experiment result, and the shape and swing angle also meet the experiment data. Furthermore, the stress of canopy are also analyzed according to the simulation results after considering the reinforcement detailed structure, which is more closed to actual physical phenomenons. The modeling method and the simulation results in this paper have certain reference value for the design and simulation verification of the DGB parachute.
出处
《航天返回与遥感》
CSCD
北大核心
2017年第2期17-26,共10页
Spacecraft Recovery & Remote Sensing
关键词
盘缝带伞
细化结构
流固耦合
有限元方法
回收着陆
Disk-Gap-Band parachute
detailed structure
fluid-structure interaction
finite element method
recovery and landing
