The Fluid-Solid Interaction Research On Slamming Process Of Stiffened Plate Structure

Slamming is always occurred under the severe condition when there is a relative vertical motion between the hull and the wave.During the process the slamming force lasts in a short time but has a high value,leading to deformation and even the damage of the local structure.So we need to consider the influence of slamming to prevent the structural failure when design the stiffened plate.What’s more,the hydroelastic effect exist as the angle between water and hull called dead-rise angle is small or the slamming velocity is large,which make the impact process more complex.For the ships like catamaran and other high speed vessel,this phenomenon is always happened.As a result,It’s important to make a study on the hydroelastic effect and find an accurate way to calculate the slamming force while consider the fluid-solid interaction.This paper focus on the fluid-solid interaction of stiffened plate structure during water entry.An aluminum wedge with stiffened panels was used in a series of free drop test.The acceleration,pressures and stress responses were measured.Through these results the influence of fluid-solid interaction is analyzed.A fluid-structure interaction analysis method which combined the software based on the finite volume theory and finite element theory is applied to simulate the water entry process of three-dimensional model.After the calculation,the transient numerical results and test results are compared and good agreement is achieved.The research this paper take is extremely significant for forecasting slamming loads of stiffened plate structure and designing the ship structure.