Finite element cable-model for Remotely Operated Vehicles (ROVs) by application of beam theory

Eidsvik, Ole Alexander Nørve; Schjølberg, Ingrid

doi:10.1016/j.oceaneng.2018.06.012

Cited by 40 publications

(7 citation statements)

References 24 publications

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“…Experimental testing methods [19][20][21][22][23] are also applied to research on offshore pipelines. Liang et al [20] conducted experiments to study the dynamic interaction between pipelines and stabbing rollers during pipeline installation.…”

Section: Introductionmentioning

confidence: 99%

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

Wang,

Chen,

Gao

et al. 2023

Materials

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The lifting operation of offshore pipelines is an important step in ocean pipeline engineering. An effective analytical method is developed for investigating the mechanical properties of the pipeline based on mechanical, physical, and geometric relationships. By using the shooting and the secant methods to transform the boundary value problem into an initial value one and then solving them with the Runge–Kutta method, the deformation and mechanical properties of the pipeline are calculated. Furthermore, based on the Det Norske Veritas (DNV) offshore standard, the mechanical properties of the pipeline are checked. The finite element method (FEM) by Orcaflex is employed to verify the accuracy of the analytical model. The effects of some factors such as the current velocity and lifting point position on the mechanical properties of the pipeline are analyzed based on the analytical model. The results indicate that the change in current velocity during the lifting process has a minimal effect on the pipeline, but the change in lifting point position significantly affects the deformation and mechanical properties of the pipeline.

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Section: Introductionmentioning

confidence: 99%

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

Wang,

Chen,

Gao

et al. 2023

Materials

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“…This model is very versatile, and recently is used for some studies found in practical problems as an investigation of the interaction between ship generated waves and slender structures [38] or for the position keeping of a crane barge during use [39]. Furthermore, this model is effectively coupled with the hydro-elastic model of a floating body in regular and irregular waves [40] and with the motions of a remotely operated vehicle (ROV) to assess its efficiency and safety [41,42].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modelling for Synthetic Fibre Mooring Lines Taking Elongation and Contraction into Account

Ćatipović

Alujević

Rudan

et al. 2021

JMSE

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Synthetic fibre mooring lines are used as an alternative to traditional steel wire ropes due to their higher strength to weight ratio. Benefits are also found in relative ease of handling, and therefore the marine industry has largely accepted this type of mooring line. By rules and regulations, the design of mooring lines should be based on a coupled dynamic analysis of a particular mooring system and moored vessel. This approach incorporates damping and inertial forces (i.e., hydrodynamic reactions) acting directly on the mooring lines due to their motion through the seawater. On the basis of the outer diameter of the synthetic fibre rope, the Morison equation gives estimations of the mooring line hydrodynamic reactions. In comparison to the traditional steel wire ropes, the synthetic mooring lines usually have relatively larger elongations and consequently larger reductions of the outer diameter. Furthermore, the lower diameter certainly leads to reduced values of damping and added mass (of mooring lines) that should be considered in the coupled model. Therefore, the aim of this study was to develop a new numerical model that includes diameter changes and axial deformations when estimating the hydrodynamic reactions. The development of the model is carried out with a nonlinear finite element method for mooring lines with the assumption of large three-dimensional motions. The obtained results show the effectiveness of the newly developed model as a more accurate approach in calculation of hydrodynamic reactions.

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“…In this study, a dynamic analysis of the proposed platform was performed through simulation before platform development. The existing studies mainly analyzed the motion between the ROV and the underwater cable while the USV was fixed or analyzed the motion changes of the underwater cable according to the USV motion at high speed [7][8][9][10][11][12][13], but, the unmanned ocean platform proposed in this study performs marine exploration while the USV and UUV move simultaneously. Therefore, it is necessary to analyze the effect of the underwater cable on the movement of the USV and UUV while the platform is moving.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Modeling and Motion Simulation of USV/UUV with Linked Underwater Cable

Hong

Kim

2020

JMSE

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This paper describes a study on the dynamic modeling and the motion simulation of an unmanned ocean platform to overcome the limitations of existing unmanned ocean platforms for ocean exploration. The proposed unmanned ocean vehicle combines an unmanned surface vehicle and unmanned underwater vehicle with an underwater cable. This platform is connected by underwater cable, and the forces generated in each platform can influence each other’s dynamic motion. Therefore, before developing and operating an unmanned ocean platform, it is necessary to derive a dynamic equation and analyze dynamic behavior using it. In this paper, Newton’s second law and lumped-mass method are used to derive the equations of motion of unmanned surface vehicle, unmanned underwater vehicle, and underwater cable. As the underwater cable among the components of the unmanned ocean platform is expected to affect the motion of unmanned surface vehicle and unmanned underwater vehicle, the similarity of modeling is described by comparing with the cable modeling results and the experimental data. Finally, we constructed a dynamic simulator using Matlab and Simulink, and analyzed the dynamic behavior of the unmanned ocean platform through open-loop simulation.

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Finite element cable-model for Remotely Operated Vehicles (ROVs) by application of beam theory

Cited by 40 publications

References 24 publications

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

Numerical Modelling for Synthetic Fibre Mooring Lines Taking Elongation and Contraction into Account

Dynamics Modeling and Motion Simulation of USV/UUV with Linked Underwater Cable

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