*LOGNORM

Data format:

A single line with up to 13 values

NWAGEN TETH HS TP STD HMHS IRAND TMIN TMAX IOSP EXPONENT NB_DIR DELTA

Status :

Optional (dynamics)

Purpose :

To define a LOGNORMAL wave spectrum divided into N frequency components. See Lognormal spectrum

Restrictions :

If LOGNORM is selected , DEPTH is required .

Details :

Parameter	Description
NWAGEN	Number of sinusoidal wave components to be generated
TETH	Direction of propagation (degrees from the positive X axis)
HS	Significant height
TP	Peak period
STD	Standard deviation
TM	Mean period
HMHS	The target maximum wave height over significant wave height ratio. A maximum wave height at least equal to HMHS x HS will be encountered during the simulation. If HMHS = 0, no maximum wave height is looked for.
IRAND	Arbitrary positive integer odd number used to trigger the phase random series generation. Two runs using the same IRAND value will generate the same phase series. (Def =12345). A integer I5 is recommended.
TMIN	Minimum period for the waves generation (Default = 0.4*Tp).
TMAX	Maximum period for the waves generation (Default = 2*Tp).
IOSP	= 1 : equal angle between spreading direction = 2 : spreading direction chosen such by constant energy
EXPONENT	Spreading function exponent
NBDIR	number of spreading directions
DELTA	maximum angle in degree of spreading from reference wave direction