Simulation Computation and Experimental Investigation on Inflatable Rubber Boat Based on Fluid-Structure Interaction Analysis

The interaction between a moving inflatable rubber boat and water is a nonlinear Fluid-Structure Interaction (FSI) problem. Based on the fundamental theory of Navier-Stokes equation in the incompressible fluid, a three-dimensional finite element model is built to investigate the stress and deformation distribution of the inflatable rubber boat running at high speed by means of FSI, and to seek the state of the stress and. strain of the inflatable boat with certain hull form under various conditions. Its speed-resistance property is analyzed in the software Maxsurf for ship design and compared with the data of the trial. The results show that the deformation of the inflatable rubber boat gradually becomes larger from, the stern to the bow and the stress concentration occurs on the joint among the diaphragm plate and the circular cylinders and the supporting engine zone on diaphragm plate. With the increasing speed, the deformation and stress become larger correspondingly and the speed-resistance property of the boat coincides with the experimental data.