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作 者:荆江[1] 秦玉灵 JING Jiang;QIN Yuling(Beijing Institute of Space Long March Vehicle,Beijing 100076,China)
出 处:《工程与试验》2025年第1期9-12,87,共5页Engineering and Test
摘 要:再入飞行器在随机振动环境下的动强度设计是航天工程领域研究的热点,目前尚无成熟经验和规范对随机振动载荷进行准静态等效。本文采用结构静强度设计理念,将再入飞行器次级结构在随机振动下的最大响应加速度作为准静态载荷,以此来开展结构强度设计和校核。首先研究了基于3σX准则的5种准静态加速度峰值等效方法原理,再建立次级结构有限元模型并开展随机振动分析,然后确定等效准静态载荷并加载于次级结构,通过分析确定适用于该类次级结构的准静态强度设计方法,为工程研制初期次级结构动强度设计提供了参考。The dynamic strength design of re-entry vehicles in random vibration environment is a hot topic in the field of aerospace engineering,but there is no mature experience and specification for quasi-static equivalence of random vibration loads.In this paper,based on the concept of structural static strength design,the maximum response acceleration of the re-entry vehicle secondary structure under random vibration is used as the quasi-static load to carry out structural strength design and calibration.Firstly,the principle of five quasi-static acceleration peak equivalence methods based on 3σX criteria is studied.Then,the finite element model of the secondary structure is established and the random vibration analysis is carried out.The quasi-static strength design method applicable to this type of secondary structure is determined through analysis,which provides a reference for the dynamic strength design of the secondary structure in the early stage of engineering development.
关 键 词:再入飞行器 随机振动 次级结构 准静态载荷 动强度设计
分 类 号:V415[航空宇航科学与技术—航空宇航推进理论与工程]
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