Multi-Objective Optimization Design for Lateral Buckling Control of Subsea Pipelines by Distributed Buoyancy Sections
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摘要: 基于弹性解析模型,提出了大尺度海底管道系统分布浮力式侧向屈曲控制的多目标优化设计策略,以满足管道系统侧向屈曲控制的不同性能要求.采用快速非支配排序遗传算法(NSGA-Ⅱ算法),对某分布浮力式海底管道浮力模块的设计参数及布置位置进行了优化设计,使侧向屈曲的位移和轴力控制达到最佳.算例结果表明,浮力模块的数量并不能对管道侧向屈曲的控制效果产生绝对的影响,通过多目标优化设计方法得到的Pareto最优集,可以为设计人员在海底管道侧向屈曲控制设计中兼顾多个性能需求以及选择更理性的设计方案提供参考.Abstract: In order to meet different performance requirements, a multi-objective optimization strategy was presented for the lateral buckling control of large-scale subsea pipeline systems based on the analytical model. The multi-objective optimization was performed with the NSGA-II algorithm to improve the lateral buckling control effects on the subsea pipeline through optimization of the layout scheme and design parameters of the distributed buoyancy sections. The optimization results show that the amount of the distributed buoyancy sections does not have absolute influence on the lateral buckling performance, and the Pareto-optimal set obtained from the multi-optimization provides helpful reference for designers to consider multiple performance requirements and choose more rational schemes.
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