关键词: 安定, 密封舱, 参数化建模, 结构优化

Abstract: As the main metal components of return-type spacecraft, the integrally stiffened structure of airtight cabins was subjected to complex loads and had to meet high reliability requirements, therefore it was not easy to achieve structure optimization. Since the traditional design method with elastic limit as the core was difficult to achieve structural weight reduction effectively with the premise of ensuring strength, a structural design and optimization method of airtight cabins was proposed based on shakedown theory. Parametric modeling method of Abaqus was used to perform a batch shakedown analysis of the model with different combinations of parameters.After calculated the load factor from each samples and performed very detailed parameter sensitivity analyses, the strength-to-weight relationship of each configuration was integrated into account and a more efficient design solution was given. Results show that, using shakedown analysis in airtight cabins, the load-carrying capacity may be improved by optimizing structural dimensions, while keeping the weight unchanged.

Key words: shakedown, airtight cabin, parametric modeling, structure optimization