Analysis of ship maneuvering difficulties under severe weather based on onboard measurements and realistic simulation of ocean environment

Jing, Qianfeng; Sasa, Kenji; Chen, Chen; Yin, Yixin; Yasukawa, Hironori; Terada, Daisuke

doi:10.1016/j.oceaneng.2020.108524

Cited by 15 publications

(7 citation statements)

References 32 publications

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“…In the third step, free-running simulations are performed, which include the standard zig-zag test, course keeping, and turning circle maneuvers. Many mathematical models use standard ship maneuvers and emergency manoeuvres in their simulations [9]. Manoeuvring tests are used to demonstrate the effectiveness of the ship's manoeuvring ability, especially in shallow waters.…”

Section: Modeling Methods For Ship Maneuverability In Shallow Watersmentioning

confidence: 99%

The Influence of Shallow Waters on the Maneuvering of Large Ships

Maljković¹,

Pavić²,

Perkovič³

et al. 2023

JMS

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The increasing demand for goods that can be transported by sea and the reduction in transportation costs have led to a trend toward larger ships. The increase in ship capacity leads to an increase in ship length and, thus, a decrease in transportation costs. The maneuverability of large ships in shallow water when calling at ports is becoming increasingly difficult. This is due to the discrepancy between increasing ship dimensions and unchanged waterway structures such as approach channels, harbors, and ports. The maneuverability of a vessel in shallow waters is different from the maneuverability in deep waters. The reasons for this are due to the shallow water effect. Shallow water affects the maneuverability of ships due to hydrodynamic forces caused by the current, shallower depth under the keel and proximity to the shore. It is a major challenge both for shipbuilders to design such vessels and for shipowners to have trained and well-educated officers who can navigate large vessels in shallow waters. This article presents the effects of shallow waters on large ship maneuvering and mathematical models that have been used to predict ship behavior under the influence of these forces.

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Section: Modeling Methods For Ship Maneuverability In Shallow Watersmentioning

confidence: 99%

The Influence of Shallow Waters on the Maneuvering of Large Ships

Maljković¹,

Pavić²,

Perkovič³

et al. 2023

JMS

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“…It had been found that there was a strong correlation between wind speed and difficulty of ship maneuvering (Jing et al, 2021). On the other hand, Roubos et al did not reach the conclusion that the wind speed had an effect on the ship maneuvering speed (Roubos, Groenewegen and Peters, 2017).…”

Section: Hypotheses Development and Testsmentioning

confidence: 96%

“…• H 1.2. : There is a significant relationship between wind speed and ship departure maneuvering time. Jing et al (2021) found that there was a weak correlation between wind direction and the difficulty of ship maneuvering. In this direction, H 2 hypothesis has been developed in order to determine the relationship between the jetties, maneuver types and wind direction where maneuvers are performed with the mean value of maneuvering times.…”

Section: Hypotheses Development and Testsmentioning

confidence: 99%

Analysis of Factors Influencing Ship's Maneuvering Times

Özkulluk,

Nas

2023

Trans. Marit. Sci.

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Ship maneuvering is like a musical piece where many internal and external factors must be managed simultaneously in a synchronized manner. While the prolongation of the maneuvering time increases hydrocarbon emission and operating costs, its acceleration threatens the safety of the maneuver. In the literature, there are many studies on the factors affecting the ship maneuver, but the number of studies on the effect of the factors influencing the ship maneuvering time is insufficient. This paper deals with the factors affecting berthing and departure maneuvers of ships in port areas on maneuvering time. The effects of environmental factors, ship structures, and human factors on the maneuvering time were examined separately. Contrary to popular belief, it has been revealed that the wind speed and direction, which are environmental factors, do not affect the maneuvering time in general. On the other hand, it has been found that length over all (LOA) and gross tonnage (GT), which are structural features of the ships, affect the maneuvering time. In human factors, it has been proven that the mean of the maneuvering times performed by the maritime pilots at the same jetty differs significantly from each other. In addition, variable regression analysis was performed in order to explain the relationship between ship’s LOA and maneuvering time. For the purpose of this study, 3,998 ship maneuver data obtained from a pilotage organization were examined.

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“…The vector η = [x, y, z, φ, θ, ψ] T represents the position and attitude of a MASS in the earth-fixed system, whereas vector ν = [u, v, w, p, q, r] T denotes the speed and rotation speed in the body-fixed system. The 6-DOF mathematical model of a MASS [28,29] can be expressed as follows:…”

Section: Modeling Of Motions Of Massmentioning

confidence: 99%

An Efficient Ship Automatic Collision Avoidance Method Based on Modified Artificial Potential Field

Zhu

Lyu

Zhang

et al. 2021

JMSE

Self Cite

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A novel collision avoidance (CA) algorithm was proposed based on the modified artificial potential field (APF) method, to construct a practical ship automatic CA system. Considering the constraints of both the International Regulations for Preventing Collisions at Sea (COLREGS) and the motion characteristics of the ship, the multi-ship CA algorithm was realized by modifying the repulsive force model in the APF method. Furthermore, the distance from the closest point of approach-time to the closest point of approach (DCPA-TCPA) criterion was selected as the unique adjustable parameter from the perspective of navigation practice. Collaborative CA experiments were designed and conducted to validate the proposed algorithm. The results of the experiments revealed that the actual DCPA and TCPA agree well with the parameter setup that keeps the ship at a safe distance from other ships in complex encountering situations. Consequently, the algorithm proposed in this study can achieve efficient automatic CA with minimal parameter settings. Moreover, the navigators can easily accept and comprehend the adjustable parameters, enabling the algorithm to satisfy the demand of the engineering applications.

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Analysis of ship maneuvering difficulties under severe weather based on onboard measurements and realistic simulation of ocean environment

Cited by 15 publications

References 32 publications

The Influence of Shallow Waters on the Maneuvering of Large Ships

The Influence of Shallow Waters on the Maneuvering of Large Ships

Analysis of Factors Influencing Ship's Maneuvering Times

An Efficient Ship Automatic Collision Avoidance Method Based on Modified Artificial Potential Field

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