Crashworthiness of Stiffened Plate Under Wedge Impact
In order to predict the crashworthiness of stiffened plate structures of ships under eccentric vertical quasi-static ballast of wedge,a new simplified analytical method is proposed in this paper.The plastic deformation area of the rectangular plate is divided into eight asymmetrical plates and the aggregate is divided into two asymmetrical parts.An linear mode is adopted in the deformation of rectangular plate and aggregate.From the perspective of the internal dynamics of ship collision,and based on the rigid-plastic theory,a simplified analytical method is deduced between the deformation damage resistance and lateral deformation of rectangular plate and aggregate under the eccentric vertical action of wedge impact,considering tensile and bending effects of the membrane.The proposed method is verified by the simulation results of nonlinear finite element software Abaqus.The results show that the proposed method has a high prediction accuracy,and can be used in the hull structure design stage to quickly predict the crashworthiness of the ship side structure.
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