摘要
针对船舶航行抑制海浪干扰需要,研究了海浪波形的建立方法.选取ITTC双参数谱作为海浪谱,通过频率等分法对其进行频率分割,计算重心频率作为谐波频率,根据长峰波海浪模型进行仿真,得出了时间和空间海浪仿真波形.采用Welch法进行频谱分析,仿真精确度达到了1.65%.该方法不失一般性,是一种工程实用方法,对船舶运动参数的预报和滤波,海浪预报、船舶动力定位等方面的研究具有重要意义.
This paper deals with the method of simulating sea wave to decrease its disturbance in the watercraft navigating.Firstly the ITTC two-parameter spectrum is selected as the power spectrum of sea wave to be simulated.Secondly the selected power spectrum is parted on a prescription composed of drugs of equal amount frequency,and the frequency of harmonic wave is determined by calculating the mass center of each section.Finally the simulated sea wave with time and space are determined on the basis of Longuest-Higgins model.The simulation accuracy arrives at 1.65% is drawn by the spectral analyzing of he simulated sea wave in Welch.Without loss of generality,this method is practical in engineering and important for the prediction and filtering for the operating parameters of watercraft,the prediction of sea wave and marine dynamic positioning.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2010年第4期30-33,共4页
Journal of Harbin University of Science and Technology
关键词
海浪仿真
频率等分法
谱估计
sea wave simulation
frequency in part
spectral estimation
