Practical maneuvering simulation method of ships considering the roll-coupling effect

Yasukawa, Hironori; Sakuno, Ryoya; Yoshimura, Y.

doi:10.1007/s00773-019-00625-4

Cited by 28 publications

(13 citation statements)

References 11 publications

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“…In general, studies on estimating steering performance considering only 3-DOF (surge, sway, yaw) have been conducted, but considering roll, research on the estimation of maneuvering performance based on 4-DOF (surge, sway, roll, yaw) is now being conducted. Yasukawa et al (2019) derived the hydrodynamic derivative and vertical action point related to roll motion using a simple empirical formula based on experimental data on four types of ships in the existing 3-DOF MMG mathematical model, and resulting in 4-DOF MMG mathematical model. Furthermore, a maneuvering motion simulation was performed to study the effect of roll on the maneuvering performance while altering the GM.…”

Section: Introductionmentioning

confidence: 99%

Change in Turning Ability According to the Side Fin Angle of a Ship Based on a Mathematical Model

Lee

Kim

Jung

et al. 2022

J. Ocean Eng. Technol.

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In general, the effect of roll motion is not considered in the study on maneuverability in calm water. However, for high-speed twin-screw ships such as the DTMB 5415, the coupling effects of roll and other motions should be considered. Therefore, in this study, the estimation of maneuverability using a 4-degree-of-freedom (DOF; surge, sway, roll, yaw) maneuvering mathematical group (MMG) model was conducted for the DTMB 5415, to improve the estimation accuracy of its maneuverability. Furthermore, a study on the change in turning performance according to the fin angle was conducted. To accurately calculate the lift and drag forces generated by the fins, it is necessary to consider the three-dimensional shape of the wing, submerged depth, and effect of interference with the hull. First, a maneuvering simulation model was developed based on the 4-DOF MMG mathematical model, and the lift force and moment generated by the side fins were considered as external force terms. By employing the CFD model, the lift and drag forces generated from the side fins during ship operation were calculated, and the results were adopted as the external force terms of the 4-DOF MMG mathematical model. A 35° turning simulation was conducted by altering the ship’s speed and the angle of the side fins. Accordingly, it was confirmed that the MMG simulation model constructed with the lift force of the fins calculated through CFD can sufficiently estimate maneuverability. It was confirmed that the heel angle changes according to the fin angle during steady turning, and the turning performance changes accordingly. In addition, it was verified that the turning performance could be improved by increasing the heel angle in the outward turning direction using the side fin, and that the sway speed of the ship during turning can affect the turning performance. Hence, it is considered necessary to study the effect of the sway speed on the turning performance of a ship during turning.

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Section: Introductionmentioning

confidence: 99%

Change in Turning Ability According to the Side Fin Angle of a Ship Based on a Mathematical Model

Lee

Kim

Jung

et al. 2022

J. Ocean Eng. Technol.

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“…The coefficients of the sine and cosine functions in Equation (7) with Equation ( 6) are considered to be equal, respectively. Based on the least squares method, the roll-added mass and damping derivatives can be calculated in Equations ( 8) and (9).…”

Section: Pure Roll Simulationmentioning

confidence: 99%

“…As a result, the turning circle became greater with large GM. Yasukawa et al [9] proposed a practical maneuvering simulation method considering the roll-coupling effect by adding the motion equation of roll in the 3D-MMG (Maneuvering Modeling Group) model. The roll moment was estimated by multiplying the hull lateral force by the vertical acting point.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Roll Derivatives of Different Surface Ships Based on Numerical Pure Roll Simulation

Mai

Vo²,

Yoon³

et al. 2022

JMSE

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Among the 6 degrees of freedom (6-DoF), excessive roll motion is the most dangerous cause of ships capsizing. However, when analyzing the maneuverability of surface ships, the roll components have usually been ignored. It is widely known that the influence of roll moment becomes significant for surface ships with low GM (metacentric height) and high speed. This paper examines the pure roll test for several surface ships to assess the roll-related hydrodynamic derivatives of added mass and damping in maneuvering. The objective ships are the KRISO Container Ship (KCS), David Taylor Model Basin (DTMB), Office of Naval Research Tumblehome (ONRT), and Delft 372 catamaran, where the DTMB and ONRT ships are equipped with complementary bilge keels as damping devices and have a small GM, which the Delft 372 catamaran does not have. The flow during pure roll is analyzed by the Computational Fluid Dynamics (CFD) simulation method that allows the complex flow around ships to be captured, especially when the bilge keel and skeg are considered. The results indicate that the roll moment is greatest in the catamaran. Since the roll moments of the DTMB and ONRT are larger than that of the KCS, bilge keels and surface shape also contribute to increasing roll damping moment. In addition, a comparison of the damping derivatives due to roll rate with results obtained from another method indicates that CFD simulation is capable of accurately predicting the roll-related derivatives, which is difficult to perform by the experiment method.

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“…The VLCC vehicle is introduced into this paper [33,34]. The 3-DOF kinematic model of VLCC is established as shown below.…”

Section: Kinematic Model Of Vlccmentioning

confidence: 99%

“…In order to solve the problems above, the present paper establishes a very large crude carrier (VLCC) movement model [33,34], and constructs a serial of irregular polygons based on the land information provided by the charts. A fast detection algorithm based on the quadtree method is proposed for determining the position relationship between the route and the irregular polygon.…”

Section: Introductionmentioning

confidence: 99%

Ship Route Planning Based on Double-Cycling Genetic Algorithm Considering Ship Maneuverability Constraint

et al. 2020

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In order to complete automatic route planning in the complex navigation environment, this paper proposes a quadratic optimization genetic algorithm combining the motion characteristics of the ships. Furthermore, the constraints of the maneuvering characteristics of ship are considered to calculate the accurate planning routes fast. First of all, the turning and speed reduction model of ships are established, which is the foundation for the accurate calculation of approach states between the own ship and target ships. Second, in order to check the position relationship between the planned route and the land objects (such as the islands and rocks) on the chart, a detection algorithm between lines and irregular polygon boundary based on quadtree method is acquired. Third, a new genetic algorithm based on double-cycling optimization is proposed by this paper. Aiming at the complex problem of comprehensive collision avoidance planning under the conditions of static and dynamic obstacles, this paper realizes an efficient and feasible solution of dynamic programming for ship route. Finally, the algorithm is verified on a test fireboat, and the experiment data prove the feasibility and effectiveness of the proposed algorithm by this paper.

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Practical maneuvering simulation method of ships considering the roll-coupling effect

Cited by 28 publications

References 11 publications

Change in Turning Ability According to the Side Fin Angle of a Ship Based on a Mathematical Model

Change in Turning Ability According to the Side Fin Angle of a Ship Based on a Mathematical Model

Assessment of the Roll Derivatives of Different Surface Ships Based on Numerical Pure Roll Simulation

Ship Route Planning Based on Double-Cycling Genetic Algorithm Considering Ship Maneuverability Constraint

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