A practical diagram to determine the residual longitudinal strength of grounded ship in Northern Sea Route

Abstract

In this study, a useful solution is proposed for assessing the safety of the ship's hull damaged by grounding in Northern Sea Route (NSR) or Arctic sea. In particular, the residual ultimate longitudinal strength of grounding damaged ship can be predicted by the grounding damage index (GDI) concept. Due to the global warming effects, the Arctic glaciers have been gradually melting, and it may bring us the new North Pole routes. However, there are uncertainties on many causes that can cause grounding accident of the commercial vessels. In this regard, residual ultimate longitudinal strength of grounding damaged commercial ship in Arctic sea is investigated. Five (5) temperatures: room temperature (RT), −20°C, −40°C, −60°C and −80°C were adopted to consider the cold temperature effect in NSR. The Panamax class oil tanker was selected for the investigation of residual ultimate longitudinal strength of grounding damaged ship. Fifty (50) reliable damage scenarios were adopted for the evaluation of structural health by utilising Residual strength versus GDI (R-D) diagram method. From this study, a modified R-D diagram is proposed which can consider grounding damage with cold temperature effect. The obtained outcome will be useful for assessing the safety of the grounded ships in Arctic sea region by measuring the grounding damage amount and surrounding air temperature [Q1].

Ultimate Compressive Strength of Stiffened Panel: An Empirical Formulation for Flat-Bar Type

“…The LSD [16] includes ultimate limit state (ULS), fatigue limit state (FLS), accidental limit state (ALS), and serviceability limit state (SLS). Among others, a number of studies have been conducted on ULS-based design, technique, and its applications in terms of ULS application to stiffened panels [36][37][38][39], scaling effect [40,41], stiffened panels with opening [42], dynamic ULS [43], low temperature effect [14], and prediction of ULS by an artificial neural network (ANN) [44]. The FLS of an offshore riser by an ANN and simplified method [45,46], the ALS and ULS of a non-ice class aged ship [4,47], a steel plated structure [3], a ship's hull [2], and Floating Liquefied Natural Gas (FLNG) [48,49] are also investigated.…”

The influence of residual stress on the ultimate strength of longitudinally compressed stiffened panels

“…Recent advancements include the developments of novel methodologies for predicting the ultimate strength of ship hull girders [11][12] and structural components [13][14]. In addition, the understanding in the collapse mechanism of marine structures is much improved attributing to numerous investigations on the ultimate strength performance of stiffened plated ship structures in relation to slenderness [15][16][17][18][19], initial imperfection [20][21], boundary condition [22], secondary loading [23][24][25], cyclic loading [26][27][28][29][30][31], arctic environment [32][33][34][35][36], elevated temperature [37], corrosion [38][39][40][41][42][43], fatigue crack [44] and accidental damage [45][46][47][48][49].…”

Condition Assessment Techniques for Aged Fixed-Type Offshore Platforms Considering Decommissioning: a Historical Review

“…In the similar manner, several empirical formulations and simplification techniques have been proposed for various structures. In particular, damage index versus residual strength concept has been proposed by and applied to the grounded ships Kim et al 2013aKim et al , 2014aKim et al , 2020a. In the similar manner, collision (Youssef et al 2016;Faisal et al 2017) has also been studied.…”