Research on anti-collision capability for double-hull design for the column of semi-submersible by numerical simulation

2007 ◽

Cited By ~ 2

Author(s):

Zhiqiang Hu ◽

Weicheng Cui ◽

Longfei Xiao ◽

Jianmin Yang

Keyword(s):

Numerical Simulation ◽

Structural Damage ◽

Simulation Method ◽

Hydrodynamic Characteristics ◽

Spar Platform ◽

Mooring Lines ◽

Hull Design ◽

Truss Spar ◽

Internal Mechanism ◽

Double Hull

The collision mechanisms of spar platform haven’t caused so much attention as that of ships in the past, for the short of this kind of collision accidents reported. But this does not mean the impossibility of the collision accident in the future. The research on external mechanism and internal mechanism for a ship colliding with a spar platform is introduced in this paper. A model test is designed to study the external mechanism. The collision scenario is described as a ship colliding with a spar platform moored in 1500 meters water depth. The specifics of the spar’s motions and the tension forces of the mooring lines are gathered, to find the hydrodynamic characteristics in the collision scenario. It is found that the maximal displacements and the maximal pitch angles of the spar platform, and the maximal tension forces of mooring lines are all linearly proportional to the initial velocity of the striking ship basically. Mooring lines play elastic roles in the collision course. The internal mechanism of the ship colliding with the spar platform is achieved by numerical simulation method and the software used is MSC.DYTRAN. A Truss-Spar is taken as the object and a double hull structural design is adopted in the part of hard tank near water surface. The curves of collision characters and the structural damage are obtained. The crashworthiness of the double hull design is verified, through the numerical simulation results.

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Comparative Study on Collision Resistance of Side Structure

Marine Technology and SNAME News ◽

10.5957/mt1.1997.34.4.293 ◽

1997 ◽

Vol 34 (04) ◽

pp. 293-308

Author(s):

Ou Kitamura

Keyword(s):

Numerical Study ◽

Fem Simulation ◽

Absorption Capacity ◽

Second Phase ◽

Practical Application ◽

Energy Absorption Capacity ◽

Collision Resistance ◽

Hull Design ◽

Design Options ◽

Double Hull

In the second phase of ASIS 's 7-year research project for improved tanker safety against collision and grounding supported by Ministry of Transport, a series of numerical simulations of side damage due to collision was carried out adopting ASIS's methodology based on the customized explicit FEM simulation system in order to demonstrate its potential power in the field of practical application Assuming the simplified rigid bow of a 150K DWT colliding ship, the energy absorption capacity of the various side double hull design options for a VLCC, such as increased number of side stringers, double side structure with top side tank in conjunction with hopper tank, and unidirectional girder stiffening system, was studied The contribution of each structural component, -side shell, inner hull, transverse web, side stringer, etc. -was also investigated in detail. Based on the results of both the numerical study and the 1/2-scale collision experiments, a new conceptual design of a VLCC side structure was developed Further study on crushable bow structure against collision and enhanced design of bottom structure against grounding is now in progress.

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TLP Survivability Against Progressive Failure of Tendon and Foundation Systems in Offshore Western Australian Harsh Environment

Volume 1: Offshore Technology ◽

10.1115/omae2013-11468 ◽

2013 ◽

Author(s):

Alaa M. Mansour ◽

Brian J. Gordon ◽

Qi Ling ◽

Qiang Shen

Keyword(s):

Numerical Simulation ◽

Failure Modes ◽

Progressive Failure ◽

Physical Model Test ◽

Harsh Environment ◽

Soil Suction ◽

Foundation Design ◽

Hull Design ◽

Potential Failure ◽

Western Australian

In this paper the design robustness of Tension Leg Platform (TLP) tendon and tendon foundation systems of a TLP that is located in offshore Western Australia is investigated. A case study of a TLP that is self-stable (without tendons) has been considered. The study involves the numerical simulation of progressive failure of tendons in cyclonic events. The TLP response during the transition from a restrained TLP with all tendons to the free-floating condition has been numerically simulated. The numerical results from this simulation have been verified against physical model test measurements. The numerical simulation is repeated for a TLP with an optimized hull design that does not maintain stability when all tendons fail. Cost versus benefit in these two cases is quantified and compared. The progressive failure of the TLP Gravity Base Foundation (GBF) system has also been investigated in this paper. One of the potential failure modes for this type of foundation is the loss of suction underneath the foundation. Increasing the amount of solid ballast in the GBF increases the net downward load on the soil and reduces the reliance on the soil suction. Numerical simulations of the progressive loss of suction are performed for two cases; 1) slightly over designed foundation to include extra ballast and 2) optimized foundation design that is highly rely on the soil suction. Again, cost versus benefit in these two cases is presented. The paper provides clear insights supported by calculations and model tests for proposed design robustness that could be built in a TLP design at a relatively small additional cost to address uncertainties associated with designing TLP in offshore Western Australian harsh environment region.

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Finite Element Analysis of the Quarter Scale Advanced Double Hull Design

Naval Engineers Journal ◽

10.1111/j.1559-3584.1995.tb03045.x ◽

1995 ◽

Vol 107 (3) ◽

pp. 185-196 ◽

Cited By ~ 1

Author(s):

Anthony Kee ◽

Peter Matic ◽

Iris Darby ◽

James L. Rodd

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Element Analysis ◽

Hull Design ◽

Double Hull

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Innovative Structural Designs of Tankers Against Ship Collisions and Grounding: A Recent State-of-the-Art Review

Marine Technology and SNAME News ◽

10.5957/mt1.2003.40.1.25 ◽

2003 ◽

Vol 40 (01) ◽

pp. 25-33

Author(s):

Jeom Kee Paik

Keyword(s):

Oil Pollution ◽

State Of The Art ◽

Pollution Prevention ◽

Innovative Design ◽

Design Procedures ◽

Design Concepts ◽

Design Alternatives ◽

Hull Design ◽

Oil Tankers ◽

Double Hull

The double-hull design concept is one of the effective ways for oil pollution prevention during collision and grounding accidents of oil tankers. Arguably there might be better design alternatives which improve the structural performance of ships against collision and grounding when compared to the thus far well accepted double-hull concept, or even a double hull that is better in comparison to what is being routinely achieved by today's design methods. In this paper, a recent state-of-the-art review is undertaken on the literature related to more rational tanker structural design procedures and some innovative design concepts for tanker structures against ship collisions and grounding.

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Structural Analysis for Estimating Damage Behavior of Double Hull under Ice-Grounding Scenario Models

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.754.303 ◽

2017 ◽

Vol 754 ◽

pp. 303-306 ◽

Cited By ~ 1

Author(s):

Aditya Rio Prabowo ◽

Jung Min Sohn ◽

Jung Hoon Byeon ◽

Dong Myung Bae ◽

Ahmad Fauzan Zakki ◽

...

Keyword(s):

Numerical Simulation ◽

Finite Element Method ◽

Finite Element ◽

Target Structure ◽

Structural Behaviour ◽

Ship Structure ◽

Damage Behavior ◽

Water Transportation ◽

Damage Extent ◽

Double Hull

Demand to increase safety for water transportation, namely ship is continuously rising as various accidental loads may threat condition of target structure, i.e. ship. Several possibilities of impact scenario can occur with various indenters, for example stranding to a grounded ice. In this work, a study of structural behaviour accounting for interaction between the ship structure and indenter is conducted. Numerical simulation is performed using finite element method to estimate damage extent of the double bottom. In analysis, the indenter for grounding scenario is applied by characteristic of the ice properties to obtain estimated response of the structure in experiencing impact on polar territory. Impact scenario is defined into three different locations, namely girder and space between two girders. Finally, tendency of the damage per destroyed component is summarized.

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