Experimental evaluation of the hydrodynamic coefficients of a ROV through Morison’s equation

Ávila, Juan Pablo Julca; Adamowski, Júlio C.

doi:10.1016/j.oceaneng.2011.09.032

Cited by 61 publications

(27 citation statements)

References 5 publications

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“…Where 0 F represents the wave loads based on Morison equation, 1 F represents the wave loads based on Improved Morison equation, 2 F represents the difference between the value of 0 F and 1 F .…”

Section: Discussionmentioning

confidence: 99%

“…Where 1 P represents the ratio P referring to horizontal wave load in Airy theory, 2 P represents the ratio P referring to vertical wave load in Airy theory, 3 P represents the ratio P referring to horizontal wave load in Stokes two order wave theory, 4 P represents the relative P referring to vertical wave load in Stokes two order wave theory.…”

Section: Discussionmentioning

confidence: 99%

“…The linearization factors for Morison's equation have been found for the cases of expected fatigue damage and expected extreme environmental load. The Morison equation inertia and drag coefficients were estimated by Julca Avila [2] with two parameter identification methods that are the weighted and the ordinary least-squares procedures. Error analysis showed that the ordinary least-squares provided better accuracy and, therefore, was used to evaluate the ratio between inertia and drag forces for a range of Keulegan-Carpenter and Reynolds numbers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wave Loads Computation for Offshore Floating Hose Based on Partially Immersed Cylinder Model of Improved Morison Formula

Zhang¹,

Chang²,

Zhang³

et al. 2015

TOPEJ

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wave Loads Computation for Offshore Floating Hose Based on Partially Immersed Cylinder Model of Improved Morison Formula

Zhang¹,

Chang²,

Zhang³

et al. 2015

TOPEJ

View full text Add to dashboard Cite

show abstract

“…It is often used to describe the effect of horizontal hydrodynamic forces generated by progressive waves on slim bodies. This equation can be decomposed into the sum of the drag and inertial forces [6].…”

Section: External Forcesmentioning

confidence: 99%

Numerical analysis of ship motion under linear and nonlinear waves

2017

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Simulating physical phenomena by applying mathematical and numerical modeling has been increasingly used during the different stages of research and development and innovation projects. The purpose of this study is to present results about translational motion (x, y, z), angular motion (α, β, γ) and trajectories obtained using a numerical model developed to study ship dynamics under the influence of linear and nonlinear waves. The results indicated that translational motion, surge and sway, is mostly influenced by thrust in the studied scenario. The translational motion (heave) displayed curves which can be related with wave patterns before 0.1 hr. The angular motion distributions displayed a variation that can be related with wave forces. However, at 0.4 hr the curves depicted smaller variations that is explained by the increased engine thrust pattern. In both simulations, the distance of 20.582 km and 20.342 km for linear and nonlinear simulations were calculated, respectively. Once both simulations yielded similar values for travel distance, the wave patterns used in this study were shown to generate variations at the displacement from 0 to 0.4 hr. After 0.4 hr, the ship displacement depicted linear curves but the engine thrust was able to overcome the external forces.

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“…Avila et al [8,9,10] carried out a series of study with system identification method as well as model test method with PMM to estimate inertial and drag hydrodynamic components based on the Morison's equation for a ROV composed mainly of cylinders and jacket-type structural members. They only considered the main inertial coefficients (related to the inertial hydrodynamic forces generated by a motion in the same direction) without counting for the cross inertial coefficients (related to the inertial hydrodynamic forces generated by a motion in other directions).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on inertial hydrodynamic behaviors of a complex remotely operated vehicle

Han

2017

European Journal of Mechanics - B/Fluids

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This paper will present an experimental study on inertial hydrodynamic behaviors of an openframe ROV (Remotely Operated Vehicle) that has a complex open-frame hull but has a large capacity holding more instruments on board than other ROVs. A 1:4 scaled model has been tested by a VPMM (vertical planar motion mechanism) in the circulating water channel of Harbin Engineering University. The inertial coefficients, which can be used for simulating the motions and so for predicting the maneuverability of the ROV, will be presented. Particular attention will be paid to discuss the properties of the cross inertial coefficients (these related to the inertial forces/moments induced by the motion in other directions).

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Experimental evaluation of the hydrodynamic coefficients of a ROV through Morison’s equation

Cited by 61 publications

References 5 publications

Wave Loads Computation for Offshore Floating Hose Based on Partially Immersed Cylinder Model of Improved Morison Formula

Wave Loads Computation for Offshore Floating Hose Based on Partially Immersed Cylinder Model of Improved Morison Formula

Numerical analysis of ship motion under linear and nonlinear waves

Experimental study on inertial hydrodynamic behaviors of a complex remotely operated vehicle

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