円周方向に弾性支持され外圧を受ける円環と水圧を受ける直交異方性円筒シェルの弾性座屈荷重算定式の比較

抄録

This paper deals with the approximate analysis of buckling load of some types of orthotropic cylindrical shells subjected to external pressure, proposing a simplified model, which is a ring supported in tangential direction by uniformly distributed springs. Comparing both the analytical results for the original and model structures, main conclusions obtained are as follows. 1) Transforming shell stiffness into the supporting spring constant in the formula of the circular rings, the buckling behavior of the above orthotropic shells can be simply estimated. 2) The formula of the elastic buckling loads of the circular rings gives the linear bifurcation loads of the isotropic shells subjected to the uniformly distributed external pressure in good accuracy by changing its dimensions. And the buckling mode of the axial direction is a half sine wave.