Efficient computation of cross-spectral densities in the stochastic modelling of waves and wave loads

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• 作者：Finn-Idar Grø ; tta Giske^a ; ^b ; ^{finn.i.giske@ntnu.no} ; Bernt Johan Leira^a ; Ole Ø ; iseth^c
• 关键词：Stochastic processes ; Wave excitation loads ; Directional waves ; Cross-spectral density ; Coherency ; Floating bridge
• 刊名：Applied Ocean Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：62
• 期：Complete
• 页码：70-88
• 全文大小：4642 K
• 卷排序：62

文摘

A new method is proposed for efficient computation of auto- and cross-spectral densities in the stochastic modelling of ocean waves and wave loads. The commonly used cos-2s type directional distribution is given special attention. The new method is compared with traditional methods that use numerical integration. The new method avoids spurious hat errors and improves computational efficiency.