THE IMPACT ACTION OF SHIPS UNDER THE ACTION OF IRREGULAR WAVES

Li Yucheng

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Li Yucheng. THE IMPACT ACTION OF SHIPS UNDER THE ACTION OF IRREGULAR WAVES[J]. Haiyang Xuebao, 1980, 2(3): 123-136.

Citation:

Li Yucheng. THE IMPACT ACTION OF SHIPS UNDER THE ACTION OF IRREGULAR WAVES[J]. Haiyang Xuebao, 1980, 2(3): 123-136.

Li Yucheng. THE IMPACT ACTION OF SHIPS UNDER THE ACTION OF IRREGULAR WAVES[J]. Haiyang Xuebao, 1980, 2(3): 123-136.

Citation:

Li Yucheng. THE IMPACT ACTION OF SHIPS UNDER THE ACTION OF IRREGULAR WAVES[J]. Haiyang Xuebao, 1980, 2(3): 123-136.

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THE IMPACT ACTION OF SHIPS UNDER THE ACTION OF IRREGULAR WAVES

Li Yucheng

Dalian Institute of Technology

Received Date: 1979-11-06

Abstract

Abstract

According to an analysis of the dynamic characteristics of ships moored at the offshore terminals under the action of wind-waves,the moored ship system may be simplified into a linear one.Introducing the transfer funtion Y_√e(ω),the impact energy of moored ships to the terminals by the random sea may be obtained from the spectra of ocean waves.Furthermore,by using the directional function of ocean waves Y₂ (α),the directional spectrum of the impact by ships can be estimated.From the experimental data a semi-empirical formula for calcufating the transfer function Y_√e(ω) for oil-tanker with a displacement from 50,000 d.w.t.to 200,000 d.w.t.and an empirical formula for calculating the directional function of impact Y₂ (α) are given in this paper.The results show that the spectrum of ocean waves has significant influence to the impact energy of ships.The value of impact energy calculated by the method of regular waves is compared to the method of irregular waves,and the influence of the directional distribution of ocean waves is also considered.

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References(12)

References

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