Title: Characteristic of double bottom responses under powered-hard grounding scenario with idealised rock indenter

Authors: Aditya Rio Prabowo; Dong Myung Bae; Joung Hyung Cho; Jung Min Sohn

Addresses: Interdisciplinary Program of Marine Convergence Design, Pukyong National University, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan, 48513, South Korea ' Department of Naval Architecture and Marine System Engineering, Pukyong National University, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan, 48513, South Korea ' Interdisciplinary Program of Marine Convergence Design, Pukyong National University, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan, 48513, South Korea ' Department of Naval Architecture and Marine System Engineering, Pukyong National University, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan, 48513, South Korea

Abstract: The grounding phenomenon included in a load-type accident has been classified as a top-two marine incident, particularly accounting for the oil spills that occur after it takes place. This study aims to present a numerical analysis for estimating ship responses under a hard grounding scenario. This analysis was validated through a pioneering penetration experiment that was re-calculated using the finite element method. In the grounding simulation, the sea floor rock was idealised as a conical indenter penetrating the ship structure. Crashworthiness criteria were considered as the structural response in this work. It was determined that the crushing of the centre girder opened tears in two of the double-bottom compartments. An estimation based on the indenter geometry showed that a steep angle of the conical indenter is capable of producing deeper damage and more visibly initial failures to the centre girder than a blunt indenter under a powered hard grounding scenario.

Keywords: ship grounding; rock model; penetration experiment; finite element method; double bottom responses.

DOI: 10.1504/IJSTRUCTE.2018.093000

International Journal of Structural Engineering, 2018 Vol.9 No.2, pp.130 - 144

Received: 09 Mar 2017
Accepted: 02 Aug 2017
Published online: 04 Jul 2018 *

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