遗传算法在海上多浮体波漂移力优化中的应用  

Application of genetic algorithm in reduction of wave drift forces on the multiple floating bodies

作　　者：张志刚 何广华 王正科 ZHANG Zhigang;HE Guanghua;WANG Zhengke(School of Naval Architecture and Ocean Engineering,Harbin Institute of Technology,Weihai,Weihai 264209,China)

机构地区：[1]哈尔滨工业大学(威海)船舶与海洋工程学院,山东威海264209

出　　处：《哈尔滨工程大学学报》2019年第2期240-246,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(11502059);哈尔滨工业大学科研创新资助项目(HIT.NSRIF.201726);威海市科技发展计划项目(2014DXGJ10)

摘　　要：针对海上浮式结构物的防护问题,考虑利用实数编码的遗传算法对结构物的尺寸参数和迎浪角进行优化,以降低海上结构物的波漂移力。对于浮式结构物的波漂移力计算,本文基于波浪交互理论和高阶边界元方法建立了三维多浮体水动力数值分析模型。计算结果表明:利用优化的尺寸参数和迎浪角,不仅可以有效降低整个浮体群的波漂移力,也可以有效减小每个浮体的波漂移力。同时,优化后的浮体周围波面得到了明显改善,从而降低了甲板砰击和上浪发生的可能性。研究发现,浮体波漂移力的减小与其迎浪侧和背浪侧的波高分布密切相关。To protect floating structures at sea,this study aims to reduce the wave drift force acting on multiple floating bodies by controlling the dimensions of these bodies and the wave-approach angle of the structure based on real-coded genetic algorithm(GA).To accurately calculate the wave drift force acting on the floating structure,a numerical model that uses a combination of wave interaction theory and higher-order boundary element method is introduced.Computation results show that the wave drift forces not only on the entire structure but also on each body can be reduced with the optimized parameters obtained by GA.Moreover,the wave height around the floating structure can be improved significantly,thereby reducing the occurrence possibility of deck slamming and green water.The reduction of the wave drift force on the entire structure is strongly related to the wave height on the weather side and leeside of the structure.

关 键 词：遗传算法 多浮体 波漂移力 迎浪角 波浪交互理论 高阶边界元方法 甲板砰击 

分 类 号：U661.1[交通运输工程—船舶及航道工程]