基于简化Zig-zag模型的钢聚氨酯夹层板屈曲分析

Biaxial buckling analysis of SPS sandwich plate based on a simplified Zig-zag model

本文提出一种简化的高阶Zig-zag理论,即面板采用一阶剪切变形理论,芯材采用Reddy高阶剪切变形理论,建立钢聚氨酯夹层板在面内压缩载荷作用下的屈曲分析模型。考虑夹层板作为船舶舱口盖的受力特性,利用Matlab和有限元软件Ansys分别求出在面内压缩载荷作用下的钢聚氨酯夹层板的屈曲临界载荷,理论解与仿真值吻合度较高并分析几何参数对结构稳定性的影响。研究结果表明,在考虑结构重量的前提下,增加芯材即聚氨酯的厚度能较好的提高结构的稳性。

In this paper,a simplified high-order Zig-zag theory was proposed and an analytical model for the buckling of steel polyurethane steel(SPS)sandwich plate subjected to in-plane compressive loads was established.The first-order shear deformation theory was adopted for the face sheets and the high-order shear deformation theory from Reddy was adopted for the core,respectively.The critical buckling load of SPS sandwich plate under in-plane compression load was calculated by using Matlab and finite element software Ansys,considering the mechanical characteristic of the sandwich plate as the ship hatch cover.The theoretical solution was in good agreement with the simulation value,and the influence of geometric parameters on the structural stability was analyzed.The results show that the stability of the structure can be improved by increasing the thickness of the core material(polyurethane)on the premise of considering the weight of the structure.