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Publications
Wang, X.G., Zhu, L., He, X. and Guedes Soares, C. (2024), Numerical study on energy dissipation of ship plates under repeated impacts, Advances in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, pp. 519-524.
Repeated impact is a common issue in naval architecture and ocean engineering, and experimental tests and numerical simulations are the most widely used tools to study this kind of problem, which can provide a clear insight into the dynamic response characteristics of structures. Experimental tests have been conducted to investigate the elastic energy and pseudo-shakedown of rectangular plates in the lab. In this paper, a corresponding numerical model of rectangular plate under repeated impacts is established, and shows good consistency with experimental tests, when friction and damping are considered. With the numerical model, the energy conversion among internal energy, kinetic energy, friction and damping dissipated energy is analyzed, and their variations during repeated impacts are explored. The internal energy consists of plastic energy and elastic energy of plate deformation, and the elastic energy increases with the plate deflection, regardless of the magnitude of impact energy. Based on the energy dissipation analysis, a general energy criterion is suggested for the study of pseudoshakedown phenomenon.
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