Long-term analysis using a scatter diagram key region to evaluate the extreme response of steel risers

Videiro, Paulo Maurício; Giraldo, Juan Sebastián Monsalve; Sousa, Fernando Jorge Mendes de; Santos, C.M.P.M. dos; Sagrilo, Luís Volnei Sudati

doi:10.1016/j.marstruc.2018.11.011

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…In order to establish a long-term wave forecast, it is necessary to know the joint distribution frequency of the significant wave height and the average period, that is, the wave scatter diagram. Since for a given significant wave height, the probability function of the maximum wave surface rise obeys the Rayleigh distribution, and the long-term probability of the wave surface rise can be obtained by superposition [7][8][9] :…”

Section: Methodsmentioning

confidence: 99%

“…According to the statistics of sea conditions in the North Atlantic and North Pacific, the corresponding relationship between the significant wave height and the sustained wind speed can be obtained [8] , and the corresponding design wind speed can be obtained from the design wave height.…”

Section: Methodsmentioning

confidence: 99%

“…Ocean currents decrease with increasing sea depth, so surface currents usually have the highest velocity. The superficial flow velocity U consists of multiple parts, which can be expressed as follows [8] :…”

Section: Methodsmentioning

confidence: 99%

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Rolling response when navigating in sea environment with carriage of heavy-lifts

宫¹,

Tian

2023

Sixth International Conference on Traffic Engineering and Transportation System (ICTETS 2022)

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Offshore structure heavy lifts, such as drilling platforms, large port machinery, etc., are currently mostly transported by semi-submersible ships over long distances. Due to the effect of the marine environment, the heavy structures carried by ships need to be securely fastened to the carrying ships. The rolling of structures caused by the movement of ships during transportation is an important factor affecting their lashing and reinforcement. At this stage, there are two commonly used inertial force calculation methods. The paper simulates and calculates the motion and load response of the ship during the navigation process based on the joint distribution frequency of the significant wave height and period of two typical waves in the sea area. During the numerical simulation of sailing, the roll response of the ship under different waves is calculated. In order to reduce the roll amplitude, it is recommended that the ship keep the top wave or the inclined top wave within 40° of the unilateral wave direction from 180° to 140° when sailing in the middle and high latitude harsh sea areas. Expanded to 60° range from 180° to 120°.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%