一种改进的随机起伏海面的仿真方法

An improved simulation method for randomly undulatory sea surface

根据线性滤波器模型的基本原理,提出了一种改进的基于高阶滤波器的随机起伏海面仿真方法.利用Pierson的半经验海浪谱模型,得到了各种不同风速条件下海面随机起伏的仿真结果,并且对仿真结果进行了比较和讨论,结果表明,利用高阶滤波器方法能更加准确地仿真不同风速下的实际海面、更好地再现随机起伏海面的海浪谱特征.这一方法的提出为海浪的物理模拟实验提供了更为准确的数值计算方法,也为研究目标与海面共存条件下高频地波雷达信号的回波特性提供了更好的数值仿真平台.

Employing the fundamental principle of linear filter model, an improved simulation method is developed based on a high-order filter model for randomly undulatory sea surface. By using Pierson＇s semiempirical ocean wave spectrum and a six-order filter model, the numerical results for the randomly undulatory sea surface which is dependent on the wind speed are obtained. Some statistical properties of numerical results, such as effective wave height and power spectral density, are discussed in detail and well compared with available data. It shows that the simulation method by the high-order filter model is more accurate than that by the lower-order filter model.