摘要
以减轻重量为目标,以不出现各种失效模式为约束条件,应用序列二次规划法对受压夹层板的尺寸以及金属泡沫的相对密度进行了优化设计。考虑了剪切对屈曲的影响和金属泡沫弹性模量与相对密度之间的非线性关系,对金属泡沫和波纹夹层板的失效模式进行分析。同时设计两种截面形状,得到具有更高承载能力的夹层板。最后对各种截面形状夹层板的承载能力进行比较。结果表明:通过优化截面尺寸和金属泡沫的相对密度可以提高夹层板的承载能力;对于受压金属泡沫夹层板最优相对密度为0.03689;对于波纹夹层板更优的截面是改进后的帽形加筋板的截面。
Aim. To reduce the weight of sandwich panels, using the SQP algorithm, we carried out an optimal design of its geometrical dimension and relative density of metal foams under the constraint conditions of no occurrence of any failure modes of compression sandwich panels. Based on Budiansky＇s research work in Ref. 2, with the influence of transverse shear on buckling and the non-linear relationship between elastic modulus and relative density of metal foams taken into further consideration, we studied the buckling of compression sandwich panel and analyzed various failure modes of compression sandwich panel. Meanwhile, we designed two new panel geometries for higher load-carrying capacity （see Fig. 1 （e）, 1 （g））. Finally, we compared the load-carrying capacities of the seven panel geometries, which are enhanced by optimizing the panels＇ geometrical dimensions and relative density or improving their geometries. The optimal design results show preliminarily that the optimal relative density of metal foams should be 0. 03689 and that sandwich panels should have the improved stiffened hat-shape cross-section （Fig. 1 （g））.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2007年第1期74-78,共5页
Journal of Northwestern Polytechnical University
关键词
夹层板
失效模式
优化设计
承载能力
sandwich panel
failure mode
optimal design
load-carrying capacity
