Creates a JONWSAP density spectrum (one-sided), defined by its integral parameters.
Usage
jonswap(hs = 5, tp = 15, fmax = rscd_freq, df = NULL, gam = 3.3)
Arguments
- hs
Hs (default: 5m)
- tp
Period (default: 10s)
- fmax
higher frequency of the spectrum or
vector of frequencies (default to resourcecode frequency vector)
- df
frequency step (unused if fmax=vector of frequencies)
- gam
peak enhancement factor (default: 3.3)
Value
Density spectrum with corresponding parameters
Details
Reference :
O.G.Houmb and T.Overvik, "Parametrization of Wave Spectra and Long Term
Joint Distribution of Wave Height and Period,"
in Proceedings, First International Conference
on Behaviour of Offshore Structures (BOSS), Trondheim 1976.
23rd International Towing Tank Conference, vol. II, pp. 544-551
ITTC Committee, 2002, "The Specialist Committee on Waves -
Final Report and Recommendations to the 23rd ITTC",
Proc. ITTC, vol. II, pp. 505-736.
Examples
S1 <- jonswap(tp = 15)
S2 <- jonswap(tp = 15, fmax = 0.95, df = 0.003)
plot(S1, type = "l", ylim = c(0, 72))
lines(S2, col = "red")
abline(v = 1 / 15)
