Development of Ice Load Generation Module to Evaluate Station-Keeping Performance for Arctic Floating Structures in Time Domain

Kang, Hyun Hwa; Lee, Dae-Soo; Lim, Ji-Su; Lee, Seung-Jae; Jang, Jinho; Jung, Kwang Hyo; Lee, Jae Yong

doi:10.26748/ksoe.2020.050

Cited by 1 publication

(2 citation statements)

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“…In [16], an ice load generation method was proposed by combining the mean values of the ice load from the ice tank test and the spectrum values from GEM. Another similar method that generates ice forces on the structure at an arbitrary heading angle was introduced for use in the time-domain analysis [17].…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Effectiveness of the Heading Control on the Mooring Line Tension and Position Offset for an Arctic Floating Structure under Complex Environmental Loads

Kang

Lee

Lim

et al. 2021

JMSE

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Even though interest in developing the Arctic region is increasing continuously, the standard procedure to be used to analyze the station-keeping performance of a floater considering ice loads has not been established yet. In this paper, the effectiveness of heading control with a dynamic positioning system is analyzed to evaluate the improvement of the performance of the station-keeping system in the ice conditions. Complex environmental loads with ice-induced forces were generated and applied to a ship type floater with dynamic positioning and mooring systems. Three-hour time-domain simulations were conducted for the two different station-keeping systems with mooring only and mooring with a dynamic positioning system. Position offsets and mooring line tensions for the two scenarios were compared with maximum values and most probable maxima (MPM) values. The results of the simulation showed that the heading control can reduce 8.2% of MPM values for the mooring lines and improve the station-keeping performance by about 16.3%. The validity of the station-keeping system that was designed was confirmed, and it is expected that the specification of mooring lines can be relaxed with the heading control.

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Section: Introductionmentioning

confidence: 99%

“…Unlike these trends, the results of the experiment were not similar to any type of distribution. Except for some outliers, more than 60% of the data matched normal distribution (See [17] for more details about the dataset.). lated for the given angle based on the nine sets of experimental data described in Section 2.3.…”

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confidence: 99%