Frequency domain analysis of dynamic response of drag dominated offshore structures

被引：12
|
作者：
Naess, A [1 ]
Pisano, AA [1 ]
机构：
[1] Norwegian Univ Sci & Technol, Dept Struct Engn, N-7034 Trondheim, Norway
来源：
APPLIED OCEAN RESEARCH | 1997年 / 19卷 / 5-6期
关键词：
frequency domain analysis; hydrodynamic drag; offshore structures;
D O I：
10.1016/S0141-1187(97)00038-2
中图分类号：
P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
The paper describes a method for stochastic representation of the hydrodynamic drag forces on offshore structures subjected to irregular waves. It is shown that, for the case of zero current, it is possible to construct a genuinely quadratic representation of the drag force which reproduces the statistical properties of the standard formulation of the drag force very closely, and which at the same rime has sufficient flexibility to ensure a spectral density that accurately al,proximates the desired force spectrum. The distinct advantage of the new representation is that it brings dynamic analysis of extensive linear structures back into the frequency domain. (C) 1998 Published by Elsevier Science Limited. All rights reserved.
引用
收藏
页码：251 / 262
页数：12
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