*WAVE SPECTRUM |
 
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*WAVE SPECTRUM |
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To specify the wave spectrum type for use in the Summary Wave Scatter computations
Refer to Summary Wave Scatter for further information on this feature.
One line specifying the spectrum type.
TYPE=Spectrum Type [, OPTION=Option]
Spectrum Type can be PIERSON-MOSKOWITZ or JONSWAP. Option can be TZ (default) or TP or TE.
Input: |
Description |
Spectrum Type: |
The options are Pierson-Moskowitz and Jonswap. |
Period Type: |
The options are Tz (mean zero up-crossing period, the default), Tp (peak period) and Te (energy period). |
(a)The spectrum type is a necessary input to allow the Summary Wave Scatter feature to generate response spectra for for seastate combinations for which you have not actually performed a numerical simulation.
(b)Flexcom has traditionally modelled wave spectra in terms of either Tz or Tp. If you specify a scatter diagram in terms of Te, Flexcom converts Te into Tz. Refer to Wave Energy Period for further information on the conversion process.
(c)When you specify Jonswap spectra, Flexcom uses the algorithm described in Jonswap Wave to calculate the Jonswap parameters fp, α and γ from the Hs and Tz/Tp values.