Time domain and frequency domain analysis of spar platforms

被引：0
|
作者：
Anam, I [1 ]
Roesset, JM [1 ]
Niedzwecki, JM [1 ]
机构：
[1] Univ Asia Pacific, Dept Civil & Environm Engn, Dhaka, Bangladesh
来源：
PROCEEDINGS OF THE THIRTEENTH (2003) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 1 | 2003年
关键词：
spar; time domain; frequency domain; transient effect; drag; nonlinearity;
D O I：
暂无
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
The paper highlights the differences between a time domain and a 2(nd) order frequency domain analysis of spar platforms using Morison's equation. Limitations of the frequency domain approach in representing the nonlinearities in forces and structural properties are shown. Monochromatic, bichromatic, trichromatic and irregular waves as well as current and wind loads are used for the parametric studies. In order to represent the nonlinear proper-ties of the mooring lines in the frequency domain, the secant and tangent modulus are used when appropriate. Such combination of moduli is found to be more accurate than a 'linearized' representation of the structural properties.
引用
收藏
页码：240 / 247
页数：8
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