Mechanical properties analysis of the naval ship similar model with an integrated sandwich composite superstructure

Abstract

The research object of the article is a similar model of a naval ship with an integrated sandwich composite superstructure. The similarity model of this naval ship is based on the similarity theory, which is obtained by scaling down the actual naval ship. Based on the theoretical guidance of the double-beam method, by using the static loading test of the four-point bending method, the article analyzes the magnitude and trend of the strain, stress, and deformation of the measuring points on the naval ship model under different load cases. The main measuring points of the similar naval ship model are located in the typical cross-sections, each deck, and the interface between the steel main hull and the integrated sandwich composite superstructure. The article mainly explores the changes of longitudinal strain and stress of the measuring points with height on three typical cross-sections, and the changes of longitudinal strain and stress with the ship's length on the interface, and the deformation of the top deck of the superstructure. Combining with the results of finite element numerical simulation, the complicated mechanical properties of the naval ship model with an integrated sandwich composite superstructure are explored by mutual verification with the experiments. Some valuable conclusions are obtained for the construction and design of the naval ship with an integrated sandwich composite superstructure.