CFD based computation of bow impact loads for buckling assessment

Oberhagemann, Jan; Radon, M.; Lee, H. von Selle D.K.

doi:10.1201/b18179-7

Cited by 5 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Calculations of transfer functions of vertical wave bending moment for damaged ships are described in Parunov et al (2015) and Folsø et al (2008) by applying linear hydrodynamic methods, while experiments on damaged ships are performed in Lee et al (2012), Begovic et al (2011Begovic et al ( , 2013Begovic et al ( , 2017 and Ćatipović et al (2019). Assessment of consequences of damage on transfer functions of ship motions and global wave-induced loads are given by Mikulić et al (2018), whereas benchmark study of global wave loads on damaged ship is presented by Parunov et al (2020).…”

Section: Vertical Wave Bending Momentmentioning

confidence: 99%

Structural Reliability Analysis of Ship Hulls Accounting for Collision or Grounding Damage

Primorac

Parunov

Soares

2020

J. Marine. Sci. Appl.

View full text Add to dashboard Cite

Classical structural reliability analysis of intact ship hulls is extended to the case of ships with collision or grounding damages. Still water load distribution and residual bending moment capacity are included as random variables in the limit state equation. The probability density functions of these random variables are defined based on random damage parameters given by the Marine Environment Protection Committee of the International Maritime Organization, while the proposed reliability formulation is consistent with international recommendations and thus may be valuable in the development of rules for accidental limit states. The methodology is applied on an example of an Aframax oil tanker. The proposed approach captures in a rational way complex interaction of different pertinent variables influencing safety of damaged ship structure.

show abstract

Section: Vertical Wave Bending Momentmentioning

confidence: 99%

Structural Reliability Analysis of Ship Hulls Accounting for Collision or Grounding Damage

Primorac

Parunov

Soares

2020

J. Marine. Sci. Appl.

View full text Add to dashboard Cite

show abstract

“…8. Results are obtained using 3D panel marine hydrodynamic software Hydrostar for head waves and small ship speed of 5 knots Parunov et al (2015). Although damage extend is very large (3 pairs of water ballast tanks in midship region are assumed to be damaged), the effect of the damage on transfer functions of vertical wave bending moments is not significant.…”

Section: Loads Due To Damage Following Collision/groundingmentioning

confidence: 99%

Prediction of wave-induced loads on ships: Progress and challenges

et al. 2016

View full text Add to dashboard Cite

The aim of this paper is to critically assess the methods used for the evaluation of wave-induced loads on ships examining analytical, numerical and experimental approaches. The paper focuses on conventional ocean going vessels and loads originating from steady state and transient excitations, namely slamming, sloshing and green water, for the latter, and including extreme or rogue waves, as well as the more occasional loads following damage. The advantages and disadvantages of the relatively simpler potential flow approaches against the more time consuming CFD methods are discussed with reference to accuracy, modelling nonlinear effects, ease of modelling and of coupling with structural assessment procedures, suitability for long term response prediction and suitability for integration within design and operational decision making. The paper also assesses the uncertainties involved in predicting wave-induced loads and the probabilistic approaches used for the evaluation of long term response and fatigue analysis. The current design practice is reviewed and the role of numerical prediction methods within the classification framework and goal based design approach discussed. Finally the suitability of current developments in prediction methods to meet the needs of the industry and future challenges is assessed.

show abstract

“…The novelty of the experimental campaign was systematic permeability and damage orifice size variations influence on vertical motions of damaged hull. In Parunov et al (2015) the case study for the determination of vertical motions and hull girder bending moments of damaged 5415 ship, presented by Lee (2012) is presented. Authors compared results from commonly used the added mass method and the lost buoyancy method against the experimental results, reporting that the lost buoyancy method underestimates while the added mass overestimates the experimental vertical bending moments in the whole frequency range.…”

Section: Introductionmentioning

confidence: 99%

An experimental study of hull girder loads on an intact and damaged naval ship

Begović

Day²,

Incecik

2017

Ocean Engineering

View full text Add to dashboard Cite

The study reported in this paper is focused on experimental investigation of the hull girder loads on an intact\ud and damaged naval ship DTMB 5415 at zero speed. The experimental campaign was carried out in head and\ud beam regular waves at the University of Strathclyde. The effect of the use of moorings in the model experimental\ud setup was investigated in the context of loads assessment, and the moorings are shown to influence the\ud measured hull girder loads at some wave frequencies compared to the free drift case. Therefore the tests in beam\ud seas are performed with free drifting model while the moored model setup was adopted for head seas. The\ud results for ship motions are compared with those from a previous campaign giving an insight into repeatability\ud and uncertainty of measurements. The roll decay of the ship in both intact and damaged conditions is analysed\ud and the linear and quadratic extinction coefficients for the model and the ship scale are reported and detailed\ud discussion on intact-versus-damaged ship roll damping behaviour is given. The results for the hull girder loads\ud are presented for intact and damaged ship. An investigation of the nonlinear effects due to wave height variation\ud in the range wave height to wave length from 1/50 to 1/22 on the shear force and bending moment values was\ud carried out for a range of wave lengths to ship length ratios from 0.8 to 1.4. The results of the extensive\ud campaign are compared against similar experimental studies forming a benchmark data for validation of\ud numerical methods

show abstract

CFD based computation of bow impact loads for buckling assessment

Cited by 5 publications

References 10 publications

Structural Reliability Analysis of Ship Hulls Accounting for Collision or Grounding Damage

Structural Reliability Analysis of Ship Hulls Accounting for Collision or Grounding Damage

Prediction of wave-induced loads on ships: Progress and challenges

An experimental study of hull girder loads on an intact and damaged naval ship

Contact Info

Product

Resources

About