摘要
应用Hemite多项式.对非线性海浪阻力进行了分析.研究表明.非线性阻力线性化后.计算值比实际值小.其均方误差约为10％.这对于海洋结构物的设计和使用来说.将是不安全的.为了改进非线性海浪阻力的计算方法.本文首次提出了非线性阻力谱传递函数的概念.并通过数值计算.给出了该函数的经验公式.为非线性海浪阻力的计算提供了简便可行而又比较精确的计算方法.
A spectral analysis of nonlinear wave drag forces was carried out in this paper by using Hermite polynomial. The study indicates that calculated wave drag forces by using linear approximation are 10% less than that their actual values meassured in mean square errors, which will result in unsafety for the offshore structures. In order to improve the estimation method of nonlinear wave drag forces, a transfer function for the nonlinear wave drag force spectrum was proposed, and an experimental formula of the transfer function was given by using numerical computation. This is a simple but accurate method to estimate nonlinear wave drag forces.
出处
《石油大学学报（自然科学版）》
CSCD
1993年第2期49-53,共5页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
谱分析
非线性
波浪
载荷谱
Spectral analysis
Nonlinear
Wave drag force
