Onboard Measurement for a Container Ship in view of Container Load Condition

Kuroda, Mariko; Tsujimoto, Masaru; Sogihara, Naoto

doi:10.2534/jjasnaoe.15.29

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…As for wave measurement, the system analyses the images obtained by X band radar for 2 minutes half-hourly. The accuracy of this wave measurement system is validated by Kuroda et al 16) .The anemometer is located at a height of 29 m above water line in full load condition and it is installed on radar mast on the bridge.…”

Section: Model Test In the Towing Tanksmentioning

confidence: 98%

Decrease of Ship Speed in Actual Seas of a Bulk Carrier in Full Load and Ballast Conditions

et al. 2012

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Estimation of ship speed in actual seas is very important to evaluate the comprehensive performance in her life. Estimation of the added resistance in ballast condition is more difficult than that in full load condition due to the complicated phenomena around the bulbous bow. The proposed method, which combines tank tests with calculation, shows the estimation of added resistance in ballast condition accurate for a Panamax bulk carrier. In this paper, the proposed method is applied to a handy-size bulk carrier (approximately 160m length) equipped with cranes in both ballast and full load conditions, and its accuracy is confirmed by model tests and onboard measurements. Moreover the difference of resistance components due to winds and waves is discussed in terms of load condition toward the improvement of evaluation of performance in actual seas for handy-size bulk carriers equipped with cranes.

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Section: Model Test In the Towing Tanksmentioning

confidence: 98%

Decrease of Ship Speed in Actual Seas of a Bulk Carrier in Full Load and Ballast Conditions

et al. 2012

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“…Its feedback to ship design enables the development of ships which display high performance in actual seas. Onboard monitoring data are also very useful for ship owners/ 21 Added resistance in short crested irregular waves at F r = 0.16 (left; using Eqs. 14 and 15, right; not using Eqs.…”

Section: Discussionmentioning

confidence: 99%

“…The estimation method is validated through on-board measurement [19][20][21][22][23] and is also applied to evaluation of the hull form above the water surface [24]. Verification of [17] the calculation method was carried out at ITTC, and its effectiveness has been confirmed [14].…”

Section: Prediction Of Added Resistance In Wavesmentioning

confidence: 99%

Performance prediction of full-scale ship and analysis by means of on-board monitoring (Part 1 ship performance prediction in actual seas)

Tsujimoto

Orihara²

2018

J Mar Sci Technol

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In recent years, it has become important to evaluate whether ship propulsive performance achieves the design performance not only in a calm sea condition but also in a seaway. Various on-board monitoring systems have been developed and fitted on-board to check the performance of ships in a seaway. The evaluation can also be fed back to a new ship design. A method for prediction of ship performance in actual seas based on a physical model is described here. Prediction of steady forces in waves, wind forces, drift forces, and steering forces is described from the viewpoint of accurate practical prediction. The prediction of the engine operating point in winds and waves is also treated here. Examples of these prediction methods are illustrated. Performance analysis by an on-board monitoring system using the performance prediction method discussed here is described in the Part 2 of this paper.

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コンテナ船の甲板上積み付け状態と風圧力の関係

Kume¹,

Hamada²

2021

J.JASNAOE

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Container ships are becoming larger in order to reduce fuel consumption per unit transportation volume. As the ship size grows, the number of bays in which containers are loaded will increase, and the number of containers per bay will also increase. The loading order of a large number of containers is usually optimized by a computer-aided planning system called a Loading Computer that can comprehensively consider ship stability and cargo handling efficiency. However, due to the increase in the size of ships, the number of ports of call in one voyage and the number of empty containers to be transported also increase, and the container loading patterns are more diverse than before. There is more than one solution.On the other hand, the loading condition of the containers on deck affects the wind forces during the voyage. The above-mentioned Loading Computer does not consider the wind forces acting on a ship, but from the viewpoint of improving energy efficiency, it is desired to consider the wind forces that change depending on the loading patterns as one parameter.In this paper, the relationship between the loading patterns of containers on deck and wind forces was clarified by means of wind tunnel tests, focusing on the number of gaps between container bays.

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Onboard Measurement for a Container Ship in view of Container Load Condition

Cited by 4 publications

References 5 publications

Decrease of Ship Speed in Actual Seas of a Bulk Carrier in Full Load and Ballast Conditions

Decrease of Ship Speed in Actual Seas of a Bulk Carrier in Full Load and Ballast Conditions

Performance prediction of full-scale ship and analysis by means of on-board monitoring (Part 1 ship performance prediction in actual seas)

コンテナ船の甲板上積み付け状態と風圧力の関係

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