文章基本信息

标题：Data-driven global sensitivity indices for the load-carrying capacity of large-diameter stiffened cylindrical shells
本地全文：下载
作者：Zhixiang Wang ; Yongjun Lei ; Dapeng Zhang 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2022
卷号：14
期号：4
页码：1-14
DOI：10.1177/16878132221090105
语种：English
出版社：Sage Publications Ltd.
摘要：The influence of input parameters on the load-carrying capacity of the large-diameter stiffened cylindrical shell has not been satisfactory understood. To obtain the global sensitivity indices for the load-carrying capacity of large-diameter stiffened cylindrical shells, a novel data-driven sensitivity analysis method is presented for the efficient calculation of Sobol’s indices. In the work, the analytical expressions to compute Sobol’s indices are derived in detail based on the Radial Basis Function (RBF) metamodel. Then, the collapse mode of stiffened cylindrical shells with different sections of stringers are simulated, and the sensitivity of the load-carrying performance to geometric parameters are analyzed. The results show that for the considered stiffened cylindrical shell: (1) The coupled flexural-torsional induced deformation becomes the main factor leading to the overall collapse of the large-diameter and heavy-load stiffened cylindrical shells. (2) The flange thickness of stringers has the strongest influence on the load-bearing capacity, followed by the web thickness of stringers. (3) The interaction influences between stringers and other components in stiffened cylindrical shells are insignificant and negligible compared to the individual influence of stringers.
关键词：Large-diameter stiffened cylindrical shell;global sensitivity analysis;Sobol’s indices;RBF metamodel;coupled flexural-torsional buckling