Ship responses to abnormal waves simulated by the nonlinear Schrödinger equation

Zhang, H.D.; Soares, C. Guedes

doi:10.1016/j.oceaneng.2016.03.064

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…A couple of literatures have covered the flaw in their analysis: H.D. Zhang and C. Guedes Soaresstudies [21] analyzed the behaviour of an LNG carrier and a chemical tanker encountering different long crested nonlinear water waves produced numerically by the nonlinear Schrödinger equation, which is capable of representing the modulational instability and of generating abnormal waves Liu el at. [8] have provided nonlinear force analysis for a Spar platform associated with 2ndorder wave loads, also the heavepitch coupled motion is taken into account.…”

Section: Discussionmentioning

confidence: 99%

A Literature Review of Wave-Induced Heave Motion of Floating Structures

Xue¹

2018

JARD

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This paper provides comprehensive review on heave motion of rigid floating structure due to wave impacts. To specify and explain the structure response, this review firstly provides a brief introduction on ocean sea wave theory, floating structure motion interpretation. Then the floating body motion in regular waves was demonstrated using a superposition method of the oscillated motion in still water and the restrained motion in waves. Meanwhile, added mass and damping coefficient, these two frequency-dependent terms are brought into discussion to generate the motion response with given wave amplitude, which is known for response amplitude operator( RAO). Based on the study in regular waves, RAO of floating structure in irregular waves is introduced while no longer in time domain but in frequency domain. The whole review covers the literatures from the early 1980s up to nowadays, based on the review, it is recommended that more experimental work regarding to frequency characteristic and relative response of larger floating body should be carried out to improve the accuracy of this method.

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Section: Discussionmentioning

confidence: 99%

A Literature Review of Wave-Induced Heave Motion of Floating Structures

Xue¹

2018

JARD

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“…Reflected on the stress curves, these extreme working conditions usually correspond to large value of stress [14]. Therefore, the distribution of these large values of stress could be applied to reflect the significance of extreme sea working conditions.…”

Section: The Pdf Of the Stress Amplitude Evaluationmentioning

confidence: 99%

Parameters Estimation and Evaluation for the Probability Density Function of Structural Fatigue Stress of a Container Vessel

Feng¹

2017

JSOE

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Fatigue stress measurement has been playing a significant role in the ship structural health monitoring and ship structural safety assessment. The PDF (probability density function) of the measured stress is one of the essentials for the further studyin this domain. This paper, based on the strain-stress data collected from a container ship, focuses on the spectrum feature of the ship structural fatigue stress. A general analysis procedure for ship hull health estimation was firstly demonstrated. With the guidance of this procedure, the estimation and test of the parameters for the PDF of the stress were conducted, which showed that the stress spectrums fit well with the Weibull distribution. To review the fatigue state, the PDF and distribution function of fatigue damage increment were further developed and examined. The structural healthy assessment of this vessel shown the daily relative fatigue damage increment obeys log-normal or Weibull distribution and the increment of the fatigue damage on steel box girders of the ship hull was very low. Finally, the analyzing results yielded that the girder structure of the ship hull had a very low failure probability, matching well with the actual relative low working load of the ship.

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“…Despite the inherent complexity of wave breaking, the practical engineering interest inspired numerous research activities to provide a more accurate physical description of rogue waves. Model tests are routinely employed by the maritime industry to provide reliable prediction of the response of marine structures to rogue waves [5][6][7][8][9][10][11][12]. In particular, the impact of a breaking wave has been identified as the most hazardous condition for structural survivability [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Velocity Field Underneath a Breaking Rogue Wave: Laboratory Experiments Versus Numerical Simulations

Alberello

Iafrati

2019

Fluids

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Wave breaking is the most characteristic feature of the ocean surface. Physical investigations (in the field and at laboratory scale) and numerical simulations have studied the driving mechanisms that lead to wave breaking and its effects on hydrodynamic loads on marine structures. Despite computational advances, accurate numerical simulations of the complex breaking process remain challenging. Validation of numerical codes is routinely performed against experimental observations of the surface elevation. However, it is still uncertain whether simulations can accurately reproduce the velocity field under breaking waves due to the lack of ad-hoc measurements. In the present work, the velocity field recorded with a Particle Image Velocimetry method during experiments conducted in a unidirectional wave tank is directly compared to the results of a corresponding numerical simulation performed with a Navier–Stokes (NS) solver. It is found that simulations underpredict the velocity close to the wave crest compared to measurements. Higher resolutions seem necessary in order to capture the most relevant details of the flow.

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Ship responses to abnormal waves simulated by the nonlinear Schrödinger equation

Cited by 8 publications

References 30 publications

A Literature Review of Wave-Induced Heave Motion of Floating Structures

A Literature Review of Wave-Induced Heave Motion of Floating Structures

Parameters Estimation and Evaluation for the Probability Density Function of Structural Fatigue Stress of a Container Vessel

The Velocity Field Underneath a Breaking Rogue Wave: Laboratory Experiments Versus Numerical Simulations

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