Variable-stiffness composite cylinder design under combined loadings by using the improved Kriging model

作     者：Jifan Zhong Yaochen Zheng Jianqiao Chen Zhao Jing 

作者机构：Department of MechanicsHuazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory for Engineering Structural Analysis and Safety AssessmentWuhan 430074China 

基　　金：the National NaturalScience Foundation of China (Grant 11572134) the China PostdoctoralScience Foundation (Grant 2017M612443) 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2019年第35卷第1期

页      码：201-211,I0006页

摘      要：The large design freedom of variable-stiffness (VS) composite material presupposes its potential for wide engineering application. Previous research indicates that the design of VS cylindrical structures helps to increase the buckling load as compared to quasi-isotropic (QI) cylindrical structures. This paper focuses on the anti-buckling performance of VS cylindrical structures under combined loads and the efficient optimization design method. Two kinds of conditions, bending moment and internal pressure, and bending moment and torque are considered. Influences of the geometrical defects, ovality, on the cylinder s performances are also investigated. To increase the computational efficiency, an adaptive Kriging meta-model is proposed to approximate the structural response of the cylinders. In this improved Kriging model, a mixed updating rule is used in constructing the meta-model. A genetic algorithm (GA) is implemented in the optimization design. The optimal results show that the buckling load of VS cylinders in all cases is greatly increased as compared with a QI cylinder.

主 题 词：Variable-stiffness composite Optimal anti-buckling design Combined loading Ovality Kriging meta-model 

学科分类：08[工学] 0801[工学-力学类] 

核心收录：

D　O　I：10.1007/s10409-018-0791-y

馆 藏 号：203396848...