Bretschneider Spectrum - Spectral Density
Spectral density S(ω) of the two-parameter Bretschneider spectrum at angular frequency ω given significant wave height H_s and modal period T_p.
Spectral density
2.052m²·s/rad
Formula, assumptions, and limits
Used for developed seas in open ocean. For North Atlantic design use ITTC spectrum (same form, different coefficients). Fit to measured H_s and T_p is adequate for most motion analyses.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Significant wave height | m | metocean data | |
| Modal (peak) period | s | spectrum | |
| Angular frequency | rad/s | analysis mesh |