月球取样返回器分离阻力分析与地面分离试验验证

Analysis and terrestrial verification of separation resistance of lunar sampling & re-entry capsule

探月工程三期研制的月球取样返回器与轨道器间采用导向装配方式,装配后存在一定预应力,同时在轨两器分离时受空间环境作用而出现热变形,引起的分离阻力会对两器的正常分离产生影响。文章对返回器与轨道器的分离阻力进行分析和测量,并开展相关地面分离验证试验,结果表明,在轨环境引起的分离阻力约为366 N,地面装配应力引起的分离阻力约为160 N,两器分离速度约为0.24 m/s。研究结果可为轨返两器的分离设计提供参考。

The reentry capsule in the third phase of China lunar exploration program is assembled with the orbital module in the guided mode,with a little prestress between two modules after the assembly.Because of the space environment,there is some resistance during the separation,which will affect the normal separation of the two modules.In this paper,an FEM analysis is made of the separation resistance,as well as the terrestrial verification,as a reference for the separation design.