Evaluations of wave-induced steady forces and turning motion of a full hull ship in waves

Yasukawa, Hironori; Hirata, Noritaka; Kuroiwa, Ryota; Mizokami, Shuji

doi:10.1007/s00773-018-0537-3

Cited by 62 publications

(26 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analytical integration method shown in this paper is exact and distinctly different from conventional ones which introduce an artificial convergence factor. For validation of the computation method, we used the experimental data conducted by Yasukawa et al [17] with a bulk carrier model in the motion-free case with forward speed under several incident-wave angles. Through a comparison between computed and measured results, we observed that EUT can predict the steady horizontal forces and yaw moment better than NSM.…”

Section: Discussionmentioning

confidence: 99%

“…Experiments measuring the wave-induced steady forces (added resistance and sway force) and yaw moment have been conducted at the seakeeping and maneuvering model basin of Nagasaki R&D Center, Mitsubishi Heavy Industries, and some of the results are reported by Yasukawa et al [17]. These experimental data are used for comparison with computations in the present paper.…”

Section: Experiments and Tested Ship Modelmentioning

confidence: 99%

“…In this experiment conducted by Yasukawa et al [17], wave-induced ship motions and steady forces were measured at 4 different forward speeds; they are 0, 4, 8, and 13.5 knots in real-ship scale. For each speed, measurements were…”

Section: Experiments and Tested Ship Modelmentioning

confidence: 99%

“…Therefore, the calculation method in this paper is markedly different from conventional ones based on the strip-theory methods in that the numerical integration in the formulae is exactly implemented without introducing any artificial convergence factor and that the computation method for the Kochin function is exact in the framework of the linear slender-ship theory and applicable to all frequencies. In the effort to validate this computation scheme, numerical computations are made for comparison with the experiment conducted by Yasukawa et al [17] using a bulk carrier model advancing in regular oblique waves with forward speed and six-degree-of-freedom motions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wave-induced steady forces and yaw moment of a ship advancing in oblique waves

Wicaksono

Kashiwagi

2017

J Mar Sci Technol

View full text Add to dashboard Cite

Wave-induced added resistance, steady sway force, and steady yaw moment, which are of second order in the incident-wave amplitude, are studied for the forward-speed case using the far-field method based on the principles of momentum and energy conservation. The Kochin functions representing ship-disturbance waves, important input data in the far-field method, are evaluated by means of both enhanced unified theory (EUT) and new strip method (NSM) to see the difference due to bow wave diffraction, 3D and forward-speed effects in the final results of second-order steady forces and moment. Special attention is paid on the precise integration method to ensure convergence in semi-infinite integrals in the calculation formulae, introducing no artificial decaying factor unlike conventional strip-theory methods. Validation of the present calculation method is made through comparison with the experiment conducted with a bulk-carrier model advancing in regular oblique waves and motion-free condition. Good agreement between computed and measured results and also superiority of EUT to NSM are confirmed for all modes of ship motion and the steady forces and yaw moment in a wide range of wave frequency.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Experiments and Tested Ship Modelmentioning

confidence: 99%

Section: Experiments and Tested Ship Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wave-induced steady forces and yaw moment of a ship advancing in oblique waves

Wicaksono

Kashiwagi

2017

J Mar Sci Technol

View full text Add to dashboard Cite

show abstract

“…The speed effect on C XW cannot be neglected. In contrast, the speed effect on the averaged wave-induced steady lateral force and yaw moment coefficients in irregular waves (C YW , C NW ) is assumed as negligible [11]. Then, C YW and C NW are expressed as a function of T v and 0 .…”

Section: Wave-induced Steady Forcesmentioning

confidence: 99%