| Time-and Frequency-Domain Analysis of Ice-Induced Displacement Responses Offshore Fixed Platforms |
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| 作者单位： | GAO Zhaojie and DUAN Menglan Senior Engineer，China Classification Society，Beijing 100006，P. R. China. |
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| 摘 要： | —On the basis of ice-induced forced vibration model,ice-induced displacement responses ofoffshore fixed platforms are investigated in both time domain and frequency domain.The relationships ofice-induced displacement responses with ice breaking modes,ice acting directions and platform structuresare analyzed and determined.The results lead to an important conclusion obtained for the first time thatice breaking frequency and the natural frequency of the first mode of the platform are the two main fac-tors that dominate the degree of vibration.The present work provides a firm basis for both design and op-eration of fixed platforms against ice loading.
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Time- and Frequency-Domain Analysis of Ice-Induced Displacement Responses of Offshore Fixed Platforms |
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| Authors: | GAO Zhaojie and DUAN Menglan Senior Engineer China Classification Society Beijing P R China |
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| Institution: | GAO Zhaojie and DUAN Menglan Senior Engineer,China Classification Society,Beijing 100006,P. R. China. |
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| Abstract: | On the basis of ice- induced forced vibration model, ice- induced displacement responses of offshore fixed platforms are investigated in both time domain and frequency domain. The relationships of ice-induced displacement responses with ice breaking modes, ice acting directions and platform structures are analyzed and determined. The results lead to an important conclusion obtained for the first time that ice breaking frequency and the natural frequency of the first mode of the platform are the two main factors that dominate the degree of vibration. The present work provides a firm basis for both design and operation of fixed platforms against ice loading. |
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| Keywords: | offshore fixed platform ice loading crushing bending buckling time domain frequency domain displacement power spectral density vibration |
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