A Method of Stiffness Calculation and Optimization Design of Marine Composite Sandwich Plates Based on Ocean Environment

Abstract

Fu, X.; Mei, Z.Y.; Zhang, F.; Chen, G.T.; Bai, X.F., and Lu, C., 2020. A method of stiffness calculation and optimization design of marine composite sandwich plates based on ocean environment. In: Bai, X. and Zhou, H. (eds.), Advances in Water Resources, Environmental Protection, and Sustainable Development. JournalofCoastalResearch, Special Issue No. 115, pp. 549-555. Coconut Creek (Florida), ISSN 0749-0208.In order to improve the performance of the ship's dome in the complex marine environment, this paper takes the optimization design of the shell plate of the sonar dome as the background, aiming to solve the problem that the structure of the ship's dome bears large flow shock load and occasional attack load in the negative pressure area, as well as the contradiction between the sound transmission and the rigidity design of the composite shell plate of the ship caused by the problem, therefore, a scheme of carbon fiber reinforced floating core sandwich shell is put forward Through the combination of theoretical analysis, numerical simulation and experimental verification, the research on the stiffness change law of acoustic sandwich plate is carried out. According to the research, it is found that the formula of composite laminate bending stiffness is also applicable to sandwich plate. Sandwich plate has the best efficiency in the stiffness optimization, and the accuracy of the stiffness optimization scheme can be verified by combining the material acoustic tube test data. The results show that the proposed optimization scheme can basically meet the needs of the marine environment, and can guide the optimization design of the stiffness of the acoustic sandwich plate in accordance with the best stiffness efficiency.