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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 414362, 11 pages
http://dx.doi.org/10.1155/2014/414362
Research Article

Sensitivity Analysis for Iceberg Geometry Shape in Ship-Iceberg Collision in View of Different Material Models

1State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2COTEC Offshore Engineering Solution, Houston, TX 77079, USA

Received 25 June 2014; Accepted 22 July 2014; Published 25 September 2014

Academic Editor: Song Cen

Copyright © 2014 Yan Gao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The increasing marine activities in Arctic area have brought growing interest in ship-iceberg collision study. The purpose of this paper is to study the iceberg geometry shape effect on the collision process. In order to estimate the sensitivity parameter, five different geometry iceberg models and two iceberg material models are adopted in the analysis. The FEM numerical simulation is used to predict the scenario and the related responses. The simulation results including energy dissipation and impact force are investigated and compared. It is shown that the collision process and energy dissipation are more sensitive to iceberg local shape than other factors when the elastic-plastic iceberg material model is applied. The blunt iceberg models act rigidly while the sharp ones crush easily during the simulation process. With respect to the crushable foam iceberg material model, the iceberg geometry has relatively small influence on the collision process. The spherical iceberg model shows the most rigidity for both iceberg material models and should be paid the most attention for ice-resist design for ships.