【摘要】 小波分析作为一种有效的信号处理方法,被广泛应用于数据去噪等方面。论文基于实测摇荡时历反演海浪谱的方法,利用小波理论对实测舰船摇荡信息去噪,从而提高了反演海浪谱的精度。以舰船的纵摇和垂向加速度姿态数据为研究依据,针对顶浪和斜浪两种航行状态利用舰船摇荡数据反推当前海浪频谱,并将纵摇的反推结果与当前海浪频谱进行精度对比,在此基础上,将其与ITTC谱相比,发现小波变换后反演所得的反演海浪谱的能量分布与真实海浪谱更为接近,从而验证了利用小波去噪提高反演海浪谱精度的可行性。更多还原

【Abstract】 As an effective signal processing method,wavelet analysis is widely used in many fields such as data denoising.Based on the method of inversing wave spectrum form swing data,the paper improved the accuracy of inverting wave sepctrum,after denoising the swing data with the method of wavelet.Researched the pitching and vertical acceleration data of ship,inverted wave spectrums from swing data of ship in heading seas and quartering seas.Compared these results with the current wave spectrum in terms of the accuracy,on this basis,compared that with the results of ITTC spectrum,it is found that the accuracy of the results are more cloesr to the real wave sepctrum in the aspect of the distribution of spectrum energy,therefore verified its feasibility.更多还原