|Table of Contents|

Citation:
　A. Mikuli,J. Parunov,C. Guedes Soares.Wave-Induced Vertical Motions and Bending Moments in Damaged Ships[J].Journal of Marine Science and Application,2018,(3):389-405.[doi:10.1007/s11804-018-0050-4]
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Wave-Induced Vertical Motions and Bending Moments in Damaged Ships

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Title:
Wave-Induced Vertical Motions and Bending Moments in Damaged Ships
Author(s):
A. Mikuli?1;  J. Parunov1;  C. Guedes Soares2
Affilations:
Author(s):
A. Mikuli?1;  J. Parunov1;  C. Guedes Soares2
1 Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia;
2 Centre for Marine Technology and Ocean Engineering(CENTEC), Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
Keywords:
Oiltanker; Collision; Grounding; Seakeeping; Wave-bending moments; Emergenc yresponse; Uncertainty analysis
分类号:
-
DOI:
10.1007/s11804-018-0050-4
Abstract:
The wave-induced vertical ship motions and bending moments of a double hull-oil tanker in realistic flooding conditions are studied. The scenarios investigated are represented by water ingress into the starboard ballast tanks for collision damage cases and both starboard and portside ballast tanks for grounding situations. Seakeeping computations are performed for eight damage scenarios and for the intact condition, each corresponding to different changes in displacement, trim, and heel. For each of the damage conditions, transfer functions of vertical motions and loads are calculated using a potential linear 3D panel hydrodynamic code in the frequency domain that includes effect of the motion of the water in flooded tanks. A MATLAB code is developed to facilitate automated hydrodynamic simulation of many damage scenarios. Verification of seakeeping results is performed by comparing transfer functions with results of the previous study. Wave-induced vertical responses of damaged ship are then compared to those of intact ship using two spectral-based methods originating from uncertainty analysis of wave loads, which are convenient tools to assess consequences of damage on short-term ship responses. Generally, observed trend is that vertical wave-induced responses of damaged ship converge toward those of intact ship with increasing wave period. Fairly small differences between responses of asymmetrically damaged ship with respect to the symmetrical incoming wave directions are found. The results of the study are an efficient method for seakeeping assessment of damaged oil tankers and the framework for evaluating consequences of damage scenarios, heading angles, and sea conditions on seakeeping responses of damaged ships. The results can be used to decide if the intact ship model can be used instead of the damaged one for the emergency response procedure or for the risk assessment studies when modeling and computational time represent important limitations.

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Memo

Memo:
Received date:2018-5-22;Accepted date:2018-7-26。
Corresponding author:J. Parunov,jparunov@fsb.hr
Last Update: 2019-03-05