SHAPE MODIFICATION OF SINGLE-LAYER RETICULATED SHELLS FOR INCREASING LINEAR BUCKLING LOAD

Abstract

This paper proposed a technique of shape modification of single-layer reticulated shells for increasing linear buckling loads. The sensitivity analysis of the linear buckling load of a single-layer reticulated shell with respect to the nodal coordinates was performed, and the distributions of the sensitivity coefficients were examined. As a result, it was found that the distribution of the absolute value of z direction component of each buckling mode resembles the distribution of the sensitivity coefficients corresponding to the buckling mode. This tendency was utilized, and the technique of adding distribution of the absolute value of the buckling mode to a shell shape was proposed. The proposal technique was applied to several reticulated shells with various forms, and the efficiency was confirmed.