波浪阻力线性化的能量法

应用能量法对非线性海浪阻力的线性化进行了研究.结果表明,运用现在常用的线性化公式计算的波浪阻力比实际的非线性波浪力偏小。其均方误差大于5％。这对于海洋结构物的设计和使用将是不安全的.为了改进非线性海浪阻力的计算方法.本文提出了能量法线性化方法.并通过数值计算.给出了线性化阻力修正系数的经验公式.用这种线性化方法对波浪力与非线性波浪力进行计算几乎没有误差.所以,该方法不但在谱分析中应用方便.并且消除了由于线性化带来的误差.

A STUDY OF LINEARIZATION OF WAVE DRAG FORCE BY MEANS OF ENERGY METHOD

A study of linearization of nonlinear wave drag forces was carried out by using the energy method. The result indicates that calculated wave drag forces by the commonly used linerarization method are more than 5 % less than the nonlinear values measured by the mean square errors. This will result in a safety problem for the design of offshore structures. In order to improve the estimation method of nonlinear wave drag forces, the energy linearization method was proposed in this paper and an experimental formula of corection coefficient of linearization drag forces was given by using numerical . computation. The calculated wave drag forces by using this method have nearly no error as compared with the nonlinear values. Therefore, this method is not only conveniently applied in spectral analysis, but also eliminate the errors introduced by linearization.