Numerically generated ocean waves based on Walsh function

H. Maeda, S. Miyajima, K. Masuda, M. Nakamura, A. Kasahara

研究成果: 会議への寄与学会論文査読

抄録

Irregular ocean waves are usually represented as the summation of the sinusoidal functions which have orthogonal characteristics. In order to save much computational time in ocean wave simulation, the Walsh function is very useful instead of the sinusoidal function. The Walsh function is a rectangular waveform taking only two amplitude value ± 1. The Walsh function satisfies orthogonality and is a complete function set. The Walsh function is similar to sin-cos function. The frequency of sinusoidal function corresponds to the sequency to the Walsh function. Fourier transformation and FFT correspond to Walsh transformation and FWT(Fast Walsh Transformation) respectively. In this paper the authors show the procedure to generate Walsh function. Then they derive the procedure to transform the ocean wave spectrum in frequency domain to that in sequency domain. And they simulate irregular ocean waves based on the Walsh function which correspond to the wave spectrum in sequency domain. Finally they discuss the computational time of this simulation comparing with that of the sinusoidal function. The authors conclude the Walsh function is useful to reduce the computational time for the ocean wave simulation.

本文言語英語
ページ113-120
ページ数8
出版ステータス出版済み - 1995
イベントProceedings of the 14th International Conference on Offshore Mechanics and Arctic Engineering. Part 5 (of 5) - Copenhagen, Den
継続期間: 1995 6月 181995 6月 22

会議

会議Proceedings of the 14th International Conference on Offshore Mechanics and Arctic Engineering. Part 5 (of 5)
CityCopenhagen, Den
Period95/6/1895/6/22

フィンガープリント

「Numerically generated ocean waves based on Walsh function」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル