CAJ | 학술논문

面向未来运载器大轴压服役性能和结构轻量化需求,提出一种布置于蒙皮桁条结构中间框上的新型长圆减轻孔,可在小幅提高结构轴压极限承载能力的前提下,实现结构减重. 考虑到后屈曲分析的计算效率,基于径向基函数( Ra-dial Basis Function, RBF)代理模型,构造了蒙皮桁条结构减轻孔的后屈曲优化模型. 算例结果表明,长圆减轻孔模型较初始设计和圆形减轻孔模型承载效率更高,且可设计性增强. 这种新型减轻孔模型有望应用在未来重型运载火箭的蒙皮桁条结构设计中.
면향미래운재기대축압복역성능화결구경양화수구,제출일충포치우몽피항조결구중간광상적신형장원감경공,가재소폭제고결구축압겁한승재능력적전제하,실현결구감중. 고필도후굴곡분석적계산효솔,기우경향기함수( Ra-dial Basis Function, RBF)대리모형,구조료몽피항조결구감경공적후굴곡우화모형. 산례결과표명,장원감경공모형교초시설계화원형감경공모형승재효솔경고,차가설계성증강. 저충신형감경공모형유망응용재미래중형운재화전적몽피항조결구설계중.
With regard to the requirements of performance and lightweight design for future vehicles under huge axial compres-sion, a novel long circle lightening hole model was developed, for middle rings of skin-stringer structures, which can produce a re-duction of structural weight accompanied with a slight increase of load-carrying capacity. Since the post-buckling analysis of such a skin-stringer structure is time-consuming, an optimization formulation for lightening holes of skin-stringer structures was established based on RBF model. Results of the illustrative example indicate that, the long circle lightening hole model has higher structural ef-ficiency and designability, compared to the initial design and the traditional circle hole model. It is expected that this novel lighte-ning hole configuration can be utilized in the skin-stringer structure design of future heavy-lift launch vehicles.