Structural Analysis of the Double Bottom Structure During Ship Grounding by Finite Element Approach

Abstract

Possibility of a water-transportation mode to experience numerous accidental loads is predicted limitless and always demand sustainable analysis. Impact phenomenon raises as main reason of environmental damage, for instance, grounding contributes in form of short-time impact and produces massive damage on the bottom structure of a marine vessels, e.g. ship. In this work, a series of numerical experiment is conducted with considering contribution of several parameters, namely impact location and seabed topology on the bottom structure of a tanker ship. The initial stage is conducted to obtain validation of the numerical method and configuration using impact test to ensure reliability of the present methodology which considers the finite element approach. In the second stage, proposed scenarios are calculated and overall evaluation of the damage extent is performed to observe resistance and behaviour of the bottom structure. Structural condition after grounding, rupture energy and crushing force are presented to observe history of grounding process. Contribution of the numerical parameter in form of meshing size is presented to provide adequate consideration in both of physical and numerical parameters. Finally, tendency of the target structure is summarized to provide prediction of further behaviour during the bottom structure experiences grounding with various scenarios. An alternative solution in respecting time cost is proposed and can be considered for other impact simulation and analysis.

Impact phenomena assessment: Part I – Structural performance of a tanker subjected to ship grounding at the Arctic

“…Historically, the Tresca was considered more fundamental, but the von Mises was seen more appealing for convenient approximation [12]. Similar works have used the von Mises as found in [4,13] which lead this work to observe Tresca contour. In comparing the material strength (Fig.…”

“…3a indicates that the highest energy was achieved by the bottom plate. In this discussion, the internal energy is determined as a main parameter which reflects the amount of energy that is necessary to plastically deform the involved structures in impact [3,4,10]. More detail observation is conducted on the polar class materials while failure took place.…”

“…Properties of the ice are given as follows: Poisson's ratio n = 0.27, Young's modulus Ex = 1000 MPa and density ρ = 960 kg/m 3 . As indicated in pioneer works [3][4], the failure criterion is necessary to be involved in calculation. The Peschmann criterion [11] is applied in this work which concludes the element length of the engineering models is 150 mm and failure strain for the double-bottom structure is 0.21.…”

“…human life loss, oil spill, cargo lost) are massive. Several studies [3][4] for maritime accidents and impact phenomena have been conducted to observe structural crashworthiness of ship under various conditions. However, the analysis conditions have not been addressed to reflect the condition of the Arctic.…”

On the Structural Behaviour to Penetration of Striking Bow under Collision Incidents between Two Ships

“…The magnitude of this load can be both small and large. The hull structural members have the possibility of experiencing this accidental load in the form of grounding (Nguyen et al [1]; Prabowo et al [2][3][4]) and collision (Ståhlberg et al [5] Bae et al [6] Prabowo et al [7][8]), which may lead to a chain of disasters such as structural failure, ship sinking, and environmental pollution. Due to its characterization as an accident, the possibility of the occurrence of a collision on a marine structure such as a ship is affected by numerous parameters, e.g., human factors, weather and natural behaviour, and instrumental failure.…”