基于遗传算法优化变分模态分解方法联合冲击谱的冲击载荷重构方法  

Reconstruction Method of Impact Load Based on Genetic Algorithm Optimized Variational Modal Decomposition Method Combined with Impact Spectrum

作　　者：王伟 肖梦凡 赵越 刘松[2] 杨康[2] 刘盼盼 杜一帆 帅剑云 WANG Wei;XIAO Mengfan;ZHAO Yue;LIU Song;YANG Kang;LIU Panpan;DU Yifan;SHUAI Jianyun(System Engineering and Transformation Center,China Nuclear Power Technology Research Institute,Shenzhen 518000,Guangdong,China;State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]中广核研究院有限公司系统工程与改造中心,广东深圳518000 [2]大连理工大学工业装备结构分析优化与CAE软件全国重点实验室,辽宁大连116024

出　　处：《中国海洋平台》2024年第5期39-44,共6页China offshore Platform

基　　金：国家自然科学基金“基于相位共轭方法的多目标噪声源在复杂声场中分离和识别研究”(编号:51609037);大连理工大学基本科研业务费项目“复杂海洋环境下舰船辐射噪声源定位与成像研究”(编号:DUT22GF206)。

摘　　要：在对海上浮式装置受到其他船舶碰撞时碰撞所形成的冲击载荷进行分析和优化时,为了降低过高的分析频率,提出基于遗传算法(Genetic Algorithm,GA)优化的变分模态分解(Variational Modal Decomposition,VMD)方法联合冲击谱(Shock Response Spectrum,SRS)的冲击载荷重构方法。针对具体冲击响应信号,采用GA优化VMD参数对冲击载荷进行分解,通过与原始载荷冲击谱对比,确定截止频率,基于载荷截止频率,对冲击载荷进行重构。结构动力学响应计算验证结果表明,基于GA优化VMD方法联合冲击谱的冲击载荷重构方法可在进行结构动力响应前可靠地对冲击载荷进行重构。In order to reduce the excessive analysis frequency when analyzing and optimizing the impact load generated by the collisions with other ships on offshore floating devices,a shock load reconstruction method based on Genetic Algorithm(GA)-optimized Variational Modal Decomposition(VMD)and Shock Response Spectrum(SRS)is adopted.Aimed at the specific impact response signal,the GA is used to optimize the VMD parameters,and the impact load is decomposed.The cut-off frequency is determined by comparing it with the original load impact spectrum.Through the calculation of structural dynamic response,the impact load reconstruction method based on GA optimized VMD method and impact spectrum can reliably reconstruct the impact load before the structural dynamic response.

关 键 词：遗传算法 变分模态分解 冲击谱 冲击载荷 截止频率 动力响应 

分 类 号：P752[天文地球—海洋科学]