基于响应面方法的海洋修井猫道结构优化分析

Optimization Analysis of Catwalk Structure for Offshore Workover Based on Response Surface Methodology

海洋平台空间及额定承载能力受限,在用动力猫道存在整机质量及体积过大的问题。为此,以某全液压驱动的举升式海洋修井动力猫道为研究对象,借助虚拟样机技术和响应面优化设计方法,根据动力猫道管柱输送的作业特点,进行动力猫道关键结构的尺寸优化设计与分析。分析结果表明:基于动力学仿真获取动力猫道待优化结构的载荷数据,借助AWE模块建立结构响应面模型,并通过优化算法求解,找到该结构尺寸设计变量的最优组合,完成了结构轻量化改进设计的目标;响应面法得到的海洋修井动力猫道结构尺寸优化设计方案与原始方案相比,各优化结构质量减轻了12.5%33.0%,同时安全系数大于2.5。所得结论可为海洋平台动力猫道的结构优化和性能提升提供理论依据。

The space and rated load-bearing capacity of the offshore platform are both limited,and the currently available power catwalk presents the disadvantages of relatively low overall quality and an excessively large footprint.A completely hydraulicallz-driven lifting power catwalk for offshore workover was investigated.The dimensions of its key structures were optimized by using the virtual prototype technology and response surface methodology,in accordacne with the pipe handling operation characteristics of the power catwalk.The surface response model of the power catwalk structure was built using the AWE module and the load data of the to-be-optimized structure of the power catwalk,obtained from dynamics simulation,and the light-weight design of the structure was delivered by optimizing the design variable combination of the structure dimension design via the optimization algorithm.The analysis results show that compared with the original design,the structure dimension design of the offshore workover power catwalk optimized using the response surface methodology is found with weight reductions of 12.5%–33.0%for the optimized structures,accompanied by the safety factors all above 2.5.The research findings provide theoretical references for structure optimization and performance improvement of the power catwalk of the offshore platform.