Wind Influence on Ship Manoeuvrability – a Turning Circle Analysis

Novaselić, Marko; Mohović, Robert; Barić, Mate; Grbić, Luka

doi:10.12716/1001.15.01.03

Cited by 4 publications

(4 citation statements)

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“…-продольное расстояние точки поворота судна на 90°, которое определяет выдвиг; -поперечное расстояние точки поворота судна на 90°, соответствующее прямому смещению; Указанные процентные оценки существенно меньше данных, приведенных в работе [6]. Однако абсолютные значения таких изменений примерно соответствуют выводам, сделанным в работе [7].…”

Section: обсуждение (Discussion)unclassified

“…Результаты поиска в интернете по ключевым словам показали, что среди немногочисленных работ о влиянии ветра на циркуляцию лишь в нескольких из них в той или иной мере рассматривается проблема количественных изменений параметров циркуляции под действием ветра. Группа хорватских ученых из университетов Риеки и Задара в работе [6] 2023 год. Том 15.…”

Section: введение (Introduction)unclassified

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Modeling the influence of wind on ship circulation elements

Anosov,

Lentarev

2023

jour

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When solving a number of practical problems of navigation and ship maneuvering, it is necessary to take into account the effect of wind on the parameters of the ship motion, including curvilinear motion, in particular, on circulation. There is very little information on this problem, especially in terms of quantitative estimates of the wind impact on circulation elements. Based on this, the purpose of this work is to study the effect of wind on the circulation elements based on mathematical modeling and to determine quantitative estimates of this effect when changing such factors as wind speed and heading angle, ship length and rudder angle. The simulation is carried out on a certified navigation simulator Transas NT Pro-5000. The mathematical model of vessel movement and wind effect used in this simulator is presented in the paper. A description of three simulated container ships with similar aerodynamic characteristics is given for the various heading angle and velocity of the wind before the start of the turn. In some experiments, the rudder angle is changed. The results of the simulation are presented in tabular and graphical forms. Quantitative estimates of the displacement of the turning points on the circulation by 90°, 180°, 270° and 360° at wind influence from the corresponding points of circulation in the absence of wind. The graphical dependences of these displacements on the heading angle of the wind and their analytical approximations are presented. The ranges of the wind heading angles at which the maximum effect of the wind on the circulation elements is observed are established. Quantitative estimates of the inversely proportional dependence of the circulation elements on the ship length are calculated. The hypotheses of the other authors about the direction of displacement of the circulation curve under wind action are tested. To verify the validity and reliability of the results obtained, it is necessary to perform similar studies using other mathematical models and natural experiments.

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Section: обсуждение (Discussion)unclassified

Section: введение (Introduction)unclassified

Modeling the influence of wind on ship circulation elements

Anosov,

Lentarev

2023

jour

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“…Generally, compared with the waves, the wind has less influence on the vertical linear acceleration and pitch angular velocity of the ship, so the vertical velocity a z and pitch angle velocity ω x caused by it can be regarded as zero. Combined with the empirical formula of the wind force and moment, the change in the ship’s linear acceleration and angular velocity caused by wind can be simplified as [ 25 ]

where K 1 , K 2 and K 3 are wind-related proportional coefficients; v rw is the relative wind speed; χ rw is the relative wind direction angle.…”

Section: Analysis Of Wind Current and Wave Interferencementioning

confidence: 99%

Ship Trajectory Generator under the Interference of Wind, Current and Waves

Ding

Bian²,

Ma³

et al. 2022

Sensors

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In view of the low accuracy of the motion parameters generated by the typical ship trajectory generator, and the fact that the problem of wind, current and wave interference is not considered, this paper establishes a new ship trajectory generator by analyzing the changes in the ship’s attitude and speed under different motion states. Through simulation, the accuracy of the main motion parameters is significantly improved compared with the typical trajectory generator; the time-varying non-uniform wind, current and wave fields are constructed, and the interference effect of wind, current and waves on ship motion is analyzed by combining the empirical formulas of force and moment; an adaptive neuro fuzzy inference system (ANFIS) based on wind, current and wave interference is designed, and the fuzzy rules of the fuzzy system are determined by training and testing the measured data; the motion parameters of superimposed wind, current and wave interference are compared with the measured data, and the accuracy is further improved after superimposing wind, current and wave interference.

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“…While controlling the depth with an echosounder, a turn is performed to the next survey line to ensure the survey vessel's safety. Their limit in measurement automatic mode should be established while taking into account the water level, the safety contour [26][27][28] and the manoeuvering parameters [29][30][31][32]. This will enable performing the measurements as close to the coastline as possible.…”

Section: Introductionmentioning

confidence: 99%

Coastal Bathymetric Sounding in Very Shallow Water Using USV: Study of Public Beach in Gdynia, Poland

Makar

2023

Sensors

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The bathymetric surveys executed with a use of small survey vessels in limited water areas, including offshore areas, require precise determination of the geospatial coordinates of the seabed which is a synthesis of, among others, determining the position coordinates and measuring the depth. Inclination of the seabed and the declining depth make manoeuvring of the sounding vessel, e.g., a hydrographic motorboat or Unmanned Survey Vehicle (USV), in shallow water impossible. Therefore, it is important to determine the minimal depth for the survey resulting from the draught of the sounding vessel and the limits of the sounding area. The boundaries also result from the dimensions of the sounding vessel, its manoeuvring parameters and local water level. Type of the echosounder used in the bathymetric survey is a decisive factor for the sounding profile planning and the distances between them and the survey vessel for the possibility performing the measurements in shallow water. Electronic Navigational Chart (ENC) was used to determine the water area’s boundaries, and the safety contours were determined on the basis of the built Digital Sea Bottom Model (DSBM). The safety contour, together with the vessel’s dimensions, its manoeuvring parameters and the hydrometeorological conditions, limit the offshore area in which the measurement can be performed. A method of determining boundaries of the survey performed by a USV equipped with SingleBeam EchoSounder (SBES) on survey lines perpendicular to the coastal line are presented in the paper in order to cover the water area with the highest amount of measurement data, with the USV’s navigational safety taken into consideration. The measurements executed on the municipal beach served verification of the DSBM.

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Wind Influence on Ship Manoeuvrability – a Turning Circle Analysis

Cited by 4 publications

References 1 publication

Modeling the influence of wind on ship circulation elements

Modeling the influence of wind on ship circulation elements

Ship Trajectory Generator under the Interference of Wind, Current and Waves

Coastal Bathymetric Sounding in Very Shallow Water Using USV: Study of Public Beach in Gdynia, Poland

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