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Wave statics

Wave statics. Chang Hsien Kuo. 國立交通大學土木工程學系 中華民國 102 年 3 月 28 日. Reference. methods. Significant wave representation . Individual wave H 1 >H 2 >H 3 …. Brestchneider (1968) H 1/3 : 前 1/3 大之個別波波高平均值 (significant wave, 示 性 波 ) T 1/3 : 相對於大小排序波高之 週期平均值 Neir et al. (2003)

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Wave statics

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  1. Wave statics Chang HsienKuo 國立交通大學土木工程學系 中華民國102年3月28日

  2. Reference

  3. methods

  4. Significant wave representation Individual wave H1>H2>H3… Brestchneider (1968) H1/3:前1/3大之個別波波高平均值 (significant wave, 示性波) T1/3:相對於大小排序波高之週期平均值 Neir et al. (2003) T1/3:T1>T2>T3…週期仿照示性波高前1/3大之平均值週期

  5. Statistical properties Rayleigh distribution

  6. Representative wave height

  7. Representative wave height

  8. Statistical theory for irregular waves

  9. Rayleigh distribution for wave height

  10. Rayleigh distribution for wave height

  11. Rayleigh distribution for wave height

  12. Rayleigh distribution for wave height

  13. 1/Nth Waves for Rayleigh distribution

  14. 1/Nth Waves for Rayleigh distribution

  15. 1/Nth Waves for Rayleigh distribution

  16. 1/Nth Waves for other distributions

  17. Regular wave

  18. Irregular wave

  19. Frequency spectrum of irregular waves Fourier transform (Fast FT)

  20. Frequency spectrum of irregular waves Brestchneider (1968) Wallops spectrum by Hwung et al . (1981) Goda (1988)

  21. Frequency spectra of irregular waves JONSWAP (1973)

  22. Directional Spectrum of sea waves G(θ) : directional distribution of energy spectrum S(f) : energy (power) spectrum

  23. Directional Spectra of sea waves Mitsuyasu (1975) Smax: Spreading parameter

  24. Directional Spectra of sea waves Smax=20

  25. Relationship between spectra and wave height Zeroth moment of spectrum

  26. Relationship between spectra and wave height

  27. Relationship between spectra and wave period Zeroth and second moments of spectrum

  28. Spectra of sea waves-Example I

  29. Example I Directional spectrum

  30. Example-I sample average of sixteen directional spectra directional spectra of in-site buoy measurements

  31. Example-I Power spectrum directional spreading function

  32. Example-II

  33. Example-II

  34. Example-II

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