Equivalent coefficient of plate stress of stiffened plates under moving slamming load

Abstract The slamming load acting on the bow of a large-bow flare ship is equivalent to a moving pulse time history with linear rise and exponential attenuation. The Abaqus finite element software is used to study the elastic dynamics of multiple stiffened plates under the action of the moving slamming load. Response calculations are conducted to analyze the influence of different load parameters on the dynamic response of the stiffened plate. The dynamic stress equivalent coefficient DLFps (Dynamic Load Factor of plate stress) of the plate is introduced, the change pattern and sensitivity between DLFps and the slamming load dimensionless parameters are analyzed, and the DLFps formula regression and verification are performed. A parameter determination method for the simplified slamming pressure model is proposed. Comparison with the results of the wedge-shaped body falling into the water test shows that the slamming stress equivalent formula DLFps of the plate proposed in this article has high accuracy and can be used to determine the slamming load of the ship structure.