摘要
针对低温贮箱连接支撑结构的承载及漏热问题,分析新型在轨非连接支撑结构(PODS)的原理,并对该结构不同工作状态进行了力、热特性仿真分析。力学特性分析结果表明:载荷小于700 N时,PODS为非接触状态,依靠在轨管传递载荷;载荷大于700 N时,PODS变为接触状态,依靠发射管传递载荷,接触状态下结构整体刚度和模态频率显著提升。热传导分析结果表明:热流传递路径与传力路径基本相同,非接触状态主要由在轨管传递热量,接触状态主要由发射管传递热量,非接触状态漏热量比接触状态减少约20%。
To study the load-bearing and the heat leakage in cryogenic tank support structure,the principle of a new passive orbital disconnect strut(PODS)was analyzed,the mechanical and thermal simulation analysis were carried out under different working status.The simulation results of the mechanical properties showed that PODS was in disconnect state and transferred load by orbit tube when the load was less than 700 N,while PODS changed to contact state and transferred load by launching tube when the load was greater than 700 N,at this time,the overall stiffness of the structure and modal frequency increased significantly.Thermal conduction simulation showed that the thermal conduction path and the load-transfer path were basically the same.Thermal conduction was mainly by orbit tube in disconnect state and by launching tube in contact state.Leakage of heat in disconnect state was about 20%lower compared with that in contact state.
作者
郑正路
高子涵
吴胜宝
吴琼
陈龙
ZHENG Zhenglu;GAO Zihan;WU Shengbao;WU Qiong;CHEN Long(Research&Development Department,China Academy of Launch Vehicle Technology,Beijing 100076,China;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)
出处
《载人航天》
CSCD
北大核心
2020年第2期185-189,共5页
Manned Spaceflight
基金
载人航天预先研究项目(010203)。
关键词
PODS
变传力路径
模态频率
热传导路径
PODS
variable force transfer
modal frequency
thermal conduction path
