• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Reliability engineering & system safety >Dependency effect on the reliability-based design optimization of complex offshore structure
【24h】

Dependency effect on the reliability-based design optimization of complex offshore structure

机译：Dependency effect on the reliability-based design optimization of complex offshore structure

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

A tradeoff between cost and safety is essential in the reliability-based design of offshore support structures operating in uncertain harsh environments. This study proposes a dependence-based double-loop optimization framework for complex structural systems under such environmental conditions. It considers the dependency of the environmental variables using a Drawable Vine (D-vine) copula. The reliability (inner loop of the design cycle) is modeled using the adaptive Polynomial Chaos Kriging (PCK) as a metamodel. The study employs a hybrid optimization approach that combines Genetic Algorithm (GA) and Sequential Quadratic Programming (SQP) in the outer loop optimization phase. The dependency effect is demonstrated on a steel column and a deep water segmented Steel Catenary Riser (SCR) at various hang angles to the offshore structure. The study shows the importance of multivariate dependence modeling in Reliability-Based Design Optimization (RBDO). It also highlights the significance of: (ⅰ) optimal copula selection, (ⅱ) the impact of variable order in the D-vine copula's dependence tree, and (ⅲ) the efficiency provided by the PCK metamodel. The method described in this paper provides a road map for a dependency-based optimal design of complex ocean structures. Also, it allows for strategic design decision-making under uncertainty, considering cost and safety.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号