可重复使用运载器的耐坠毁缓冲装置的设计优化

针对采用四腿式着陆支架的可重复使用运载器，提出一种油气-蜂窝两级缓冲的新型耐坠毁缓冲装置，常规油气缓冲器实现重复使用，危险工况下蜂窝缓冲器实现耐坠毁功能。建立了运载器着陆动力学模型，给出了运载器着陆的四种极限工况及铝蜂窝压溃载荷的求解方法，基于径向基(RBF)代理模型，采用多学科协同优化方法，对多工况下运载器两级缓冲装置设计参数进行了优化。结果表明，多学科协同优化方法有着较好的准确性，优化后运载器的最大过载和缓冲支柱载荷峰值均得到降低。最后，对比了单独油气缓冲器与两级耐坠毁缓冲装置下运载器的着陆响应，结果表明，使用两级耐坠毁缓冲装置在降低运载器最大着陆过载和缓冲支柱载荷峰值上有着较为明显的优势。

Design and Optimization of a Crashworthy Damper Used for Reusable Launch Vehicles

 Aimed at the reusable launch vehicle with four symmetrically-distributed eversion struts landing gear，a new two-stage crashworthy damper which contains an oil pneumatic shock absorber and a honeycomb damper is proposed. The oil pneumatic damper can be reused while the honeycomb damper can protect the carrier under the dangerous conditions. The soft-landing dynamic model is established. Based on the model, four critical landing conditions and the solution of the honeycomb crushing force are given. The collaborative optimization and archive-based micro-genetic algorithm (CO-AMGA) are adopted to optimize the design parameters of the two-stage crashworthy damper. And the radial basis function (RBF) is applied to shorten the time cost. The results show that the maximum acceleration and landing struct force of the vehicle decrease after the optimization. Compared with the traditional damper, the two-stage crashworthy damper has advantages in reducing the maximum impact acceleration and the maximum force of the buffer pillar.