基于形函数的船体梁总纵弯矩识别方法研究  

Research on Identification Method of Longitudinal Bending Moment of Ship Hull Beams Based on Shape Function

作　　者：徐耕读 甘进 高梓昂[1,3] 吴卫国 XU Gengdu;GAN Jin;GAO Ziang;WU Weiguo(Key Laboratory of High Performance Ship Technology(Wuhan University of Technology),Ministry of Education,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Green&Smart River-Sea-Going Ship,Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]高性能船舶技术教育部重点实验室(武汉理工大学),武汉430063 [2]武汉理工大学船海与能源动力工程学院,武汉430063 [3]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,武汉430063

出　　处：《中国造船》2024年第4期77-88,共12页Shipbuilding of China

摘　　要：船体梁抵抗总纵弯曲的能力是船体结构安全性与可靠性校核的重要指标。为了提升船体结构总纵弯矩识别的精度,基于形函数的载荷识别提出了改进的总纵弯矩识别方法。通过数值分析与试验方法,以空心薄壁方形梁为研究对象,选取了三阶幂函数、复合三角函数和拉格朗日函数这3种典型基函数构成的形函数评估了改进方法的有效性。结果表明,不论选取何种形函数,所采用的改进方法均能有效提升船体梁总纵弯矩的识别精度。该方法可应用于与船体健康监测相关的实际工程。Resistance of ship hull beams to the longitudinal bending is an important indicator for the safety and reliability verification of ship structures.To improve the accuracy of longitudinal bending moment identification of ship structures,this study proposes an improved method based on the shape function load identification method.A hollow thin-walled square beam is taken as the research object and three types of base functions are selected:third-order power function,trigonometric function,and Lagrange function.Through the numerical analysis and experiments,the effectiveness of the improved method is evaluated,which can improve the accuracy of identifying longitudinal bending moment regardless of the shape function chosen.The method can be applied to practical engineering related to ship health monitoring.

关 键 词：总纵弯矩识别 形函数 船体梁 健康监测 影响系数矩阵法 

分 类 号：U663.6[交通运输工程—船舶及航道工程]