曲线片型加筋壁板的稳定性优化设计

加筋板作为一种典型结构被广泛应用于航空航天领域,为进一步拓展直筋加筋板的设计空间,提出了一套基于Model Center设计优化环境、Catia和Abaqus的曲线片型加筋板优化设计框架.一方面,筋条曲线采用参数数目可变的等距剖分三次B样条插值函数,为曲筋加筋板提供了足够大的优化空间.另一方面,采用筋条加载端相聚和筋条垂直于板边2种方式来解决曲线片型加筋板的筋条加载问题,从而产生了一些新的曲筋加筋板布局形式.优化结果表明,对于单向载荷主导的加筋板,曲筋加筋板相对于直筋加筋板稳定性改善不大.但对于复杂组合载荷,曲筋加筋板获得了比直筋加筋板更好的稳定性.

Design and optimization of improving stability of curvilinear blade-stiffened panels

Stiffened panels are widely used in the aerospace field as a typical structure. To further expand the design space of straight stiffened panels, an optimization framework for curvilinear blade-stiffened panels was developed based on ModelCenter optimization environment, Catia and Abaqus. Stiffeners were generated by equally-splitm cubic B-spline interpolation function, which had no limit to the number of parameters, thus providing a sufficiently large optimization space for curvilinear stiffened panels. On the other hand, two methods were taken to load on stiffeners including collecting loaded edges of stiffeners and making stiffeners perpendicular to panel edges and some new configurations of stiffened panels were proposed. Optimization results show that for single-axle load, curvilinear stiffened panels in comparison with straight stiffened panels make very small stability improvement. But for multi-axial load, curvilinear stiffened panels have better stability than straight stiffened panels.