Ship structural component contribution evaluation based on grey target theory

WANG Wenyu，LIU Jingxi，ZHAO Yao

School of Naval Architecture and Ocean Engineering，Huazhong University of Science and Technology， Wuhan 430074，China

Abstract：［Objectives］ A concept named 'component contribution rate' is proposed to solve problems concerning the influence of ship structure components on ship structure performance.［Methods］First, a hierarchical structure is elaborated and mapped from structural components to structural performance. Second, the component contribution rate is defined in order to describe the contribution rate for a component in structural performance to fulfill its structural purpose. Next, the grey target theory is applied to quantify the component contribution rate.［Results］Finally, the application of the proposed method is demonstrated through a SWATH case study.［Conclusions］This method can be applied in the evaluation of the ship structural schemes，in order to support the optimal design of ship structure. Key words：ship structural performance；components contribution rate；grey target theory