考虑结构-桩-土相互作用的导管架平台优化设计

首先建立了多设计准则、多约束条件的面向结构-桩-土相互作用的导管架海洋平台优化设计模型,然后给出了此模型与结构分析软件及优化算法软件相结合进行优化设计的方法,并以胜利油田埕北11#井单井采油平台为例进行优化设计.结果显示所建模型既不依赖于优化算法,也不依赖于初始设计值,目标函数值均收敛于同一极小值且收敛速度较快、减小幅度可观,从而说明了此模型的合理性.

Optimum design of jacket platforms considering structure-pile-soil interaction

This paper presents an optimum design model for offshore jacket platforms under multiple design rules and constrained conditions considering the structure pile soil interaction, then gives an optimum design process in which the optimum model is used with structural analysis software and optimum algorithm software. The Chengbei 11 # Offshore Platform, which lies in the Shengli Oil Field, is designed using the optimum model with the results showing that the optimum model depends on neither the optimum method nor the initial values of design variables. All values of the object function converge at the same minimum value with a high convergent speed and a great decrease ratio, thus proving that the optimum model is reasonable and can bring obvious economic benefit in the offshore platform design.