海浪运动数字模拟的ARMA法

ARMA METHOD FOR THE SIMULATION OF OCEAN WAVES

本文研究采用ARMA模型对海浪运动过程进行数字模拟的问题,引入了精确计算模型的输出—输入互相关函数的简单的迭代步骤,使ARMA模型参数的确定不依赖于高阶AR模型,从而避免通常的ARMA法中存在的计算困难,并使导出的模型能更可靠地实现P—M海浪谱。

The digital simulation of ocean waves by use of the ARMA model is investigated. Asimple iteration procedure for the estimation of the model output—input cross—correlation is introduced to make the determination of ARMA parameters independent of the AR model with high order. In this way, the numerical difficulties encountered in the usual ARMA procedure can be avoided, and more reliable ARMA representation of the P-M spectrum can be achieved.