Abstract
Ships and offshore structures can be damaged due to repeated impact pressures arising from slamming, sloshing, and green water during their service. This paper deals with the damage to steel plates of actual marine structures caused by repeated impact pressures induced by slamming. The numerical analysis model was developed and presented in detail. In the calculations, based on the test model material, the strain hardening was defined using proposed equations, and the strain rate effect was also considered. The pressure pulse profile was idealized for the simulations. After validation of the numerical model, a rigorous parametric study on clamped plates with actual scantling used for marine vessels was then performed. Effects of the key design parameters (peak pressure, load duration, scantling, and load repetition) on the damage extents of plates were addressed. The results showed that the residual deflection was accumulated due to repeated impulsive loads, in which the deflection was significantly increased after the first impact, and approached a certain value for later impacts. A simple yet accurate design formula was proposed for predicting the residual deflection of plates due to repeated impact pressures.
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Acknowledgments
One of the authors, Dac Dung Truong was funded by Vingroup JSC and supported by the Postdoctoral Scholarship Programme of Vingroup Innovation Foundation (VINIF), Institute of Big Data, code: VINIF.2021.STS.26.
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Truong, D.D. et al. (2023). Numerical Investigation on the Damage Extents of Plates Due to Repeated Slamming Loads. In: Huang, YP., Wang, WJ., Quoc, H.A., Le, HG., Quach, HN. (eds) Computational Intelligence Methods for Green Technology and Sustainable Development. GTSD 2022. Lecture Notes in Networks and Systems, vol 567. Springer, Cham. https://doi.org/10.1007/978-3-031-19694-2_19
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