基于平铺刚度法的弧形加筋板的轻量化设计

Lightweight Design of Arc Rib Stiffened Plates Based on the Smeared Stiffener Method

加筋板结构是航空航天结构设计中常见的承载部件,可以在保证加筋板性能的基础上减轻其结构质量,能够带来巨大的实际效益.因此,加筋板结构的轻量化设计一直是航空航天领域的研究重点.基于同步失效的概念,设计了一种新型的弧形加筋板,旨在充分利用加筋肋的轴向承载能力.同时,基于平铺刚度法,准确预测了弧形加筋板的临界屈曲载荷.最后采用粒子群优化算法对弧形加筋板进行了轻量化设计.算例结果表明,弧型加筋板承载能力优异,轻量化设计效果显著,具有良好的优化效果.

Stiffened plates are common bearing components in aerospace structure design,which can bring great economic benefits and reduce the structure weight based on the insurance of the plate performance.Therefore,the lightweight design of stiffened plate structures is a research focus in the aerospace field.Based on the concept of synchronous failure,a new type of arc rib stiffened plate was proposed to sufficiently make use of the axial bearing capacity of ribs.Then,the critical buckling load of the arc rib stiffened plate was accurately predicted based on the smeared stiffener method.The lightweight design of arc rib stiffened plates was carried out by means of the particle swarm optimization algorithm.The results show that,the arc rib stiffened plate has excellent bearing capacity,significant lightweight design effects,and promising optimization results.