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