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Indexed by:会议论文

Date of Publication:2013-10-16

Included Journals:EI、CPCI-S、SCIE

Volume:3

Page Number:263-266

Abstract:Thin-walled cylindrical shells subjected to axial compression are sensitive to initial geometrical imperfections. Firstly, the influence of a single dimple imperfection on the load-carrying capacity of cylindrical shells is investigated by varying the amplitudes and positions of the dimple imperfection. Thereafter, a surrogate-based optimization framework of Worst Multi-Perturbation Load Approach (WMPLA) is proposed to study the reduction of the buckling load of cylindrical shells based on a finite number of dimple imperfections, aiming at providing a reference for improving knockdown factors (KDF) for cylindrical shells. Finally the effectiveness of the present method is demonstrated by an illustrative example.