Explicit finite element code is adopted to simulate the dynamic response of flat stiffened panels under slamming loads. In order to validate the code, numerical simulation of pressure response is carried out and compared with experimental results published. One panel with ‘T’ stiffeners is proposed for water entry problem with 0° dead rise angle. Both rigid and flexible bodies are investigated. Pressure response on coupling surface is predicted and compared with each other. Hydroelastic response of stiffened panels is studied in details, with focus on stress response in panel and stiffener. Coupling effects between fluid and structures are discussed. Sensitivity analysis is carried out. Factors influencing the role of hydroelasticity are discussed, such as air cushion effects, impact velocity, and panel stiffness, etc.

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