基于灵敏度分析的导管架海洋平台模型修正技术研究

Research of Jacket Platform Model Correction Technique Based on Sensitivity Analysis

从室内导管架平台模型静力应变对物理参数变化的灵敏度出发,以导管架结构的材料和几何尺寸为修正参数,探讨了导管架结构的有限元模型修正问题。确定优化模型的目标函数及约束变量,利用一阶优化算法对修正参数进行优化,优化迭代后最小误差1.35%。

From the sensitivity analysis of the interior jacket platform model respects to the variations of the physical parameters,the material and the geometry of the jacket structure as the correction parameter are researched,and the finite element model updating problem of the jacket structure is discussed. The objective function and constraint in optimization model have been established. The first-order optimization algorithm is adopted to optimize the correction parameter,from the optimization result,the iterative error is less than 1. 35%.