*WAVEHEIGHT

Data format:

A single line with 2 values

PERCENTAGE_UP PERCENTAGE_DOWN

Purpose :

When wave spectra are defined, the wave elevation is generated by a random procedure. With DeepLines, it is possible to impose that the wave elevation seen during the simulation is higher than a requested value Hmax (see associated keywords WAVJON, OCHIHUBBLE) but the resulting wave height HDeep may be much greater than the expected one.

This keyword allows defining lower and upper bound values for the selected maximum wave height.

\[ Hmax * (1 - \frac{PERCENTAGE_{DOWN}}{100}) < H_{Deep} < Hmax * (1 + \frac{PERCENTAGE_{UP}}{100}) \]

Details :

Parameter	Description
PERCENTAGE_UP	The upper bound accuracy value to achieve the target maximum wave height. This value must be positive. Setting PERCENTAGE_UP equal to 5 means that the wave height must be at most 5% higher than the target value. The default value for PERCENTAGE_UP is 100. This means that the maximum wave height could be as a maximum 100% larger than the target value. Warning: Setting PERCENTAGE_UP to 0 results in the default value being used.
PERCENTAGE_DOWN	The lower bound accuracy value to achieve the target maximum wave height. This value must be positive. Setting PERCENTAGE_DOWN equal to 1 means that the wave height must be at most 1% lower than the target value. The default value for PERCENTAGE_DOWN is 1.333 which means that the maximum wave height would be as a minimum 1.333% lower than the target value. Warning: Setting PERCENTAGE_DOWN to 0 results in the default value being used. Very low values like 0.01 should therefore be used instead of 0 to ensure that the maximum wave height will actually be larger than the target value.

Warning

PERCENTAGE_UP and PERCENTAGE_DOWN data may also be setup within the TIMEDRIFT keyword. This may result in input data conflicts in the event the WAVEHEIGHT and TIMEDRIFT keywords are both input into the LOG file. In this case, the set of parameters that is located the nearer to the end of the LOG file is taken into account by the FE engine. You should then put the WAVEHEIGHT keyword after the *TIMEDRIFT if you wish the associated data to be accounted for in your analysis.