Influence of IACS New Wave Data on Design Values of Ship Vertical Wave Induced Load

YAGN Jun; WANG Xueliang; ZHANG Fan; WANG Yitao

doi:10.7643/ issn.1672-9242.2025.12.008

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (12) : 57-67. DOI: 10.7643/ issn.1672-9242.2025.12.008

Ships and Marine Engineering Equipment

Influence of IACS New Wave Data on Design Values of Ship Vertical Wave Induced Load

YAGN Jun^1,2,3, WANG Xueliang^1,2,3, ZHANG Fan^1,2, WANG Yitao^1,2,3

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Abstract

The work aims to study the features of the new wave data and compare the differences between the old and new wave data. With a chemical tanker, a LNG carrier and a cruise as research objects, hull motions and vertical wave induced loads were calculated. Long term prediction values of wave induced load based on old and new wave data for these ships were obtained, and the influence of the wave data on design values of load was analyzed. The results showed that the covering areas, wave scatter diagram, wave spectrum, wave spreading function and recommended calculation speed in the new No. 34 wave data were modified. Based on the new wave data, the predicted vertical shear force at the midship section decreased by 18% to 28%, meanwhile vertical bending moment decreased by 11% to 15%. The recommended speed was changed from 0 to 5 knots, which had a relatively small influence on vertical shear force and bending moment. Overall, the new wave data indicates a moderation in the severity of the North Atlantic sea states, which causes a decrease in the design values of the vertical shear force and bending moment.

Key words

IACS / wave data / wave induced load / wave scatter diagram / wave spectrum / long term prediction

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YAGN Jun, WANG Xueliang, ZHANG Fan, WANG Yitao. Influence of IACS New Wave Data on Design Values of Ship Vertical Wave Induced Load[J]. Equipment Environmental Engineering. 2025, 22(12): 57-67 https://doi.org/10.7643/ issn.1672-9242.2025.12.008

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