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*Wave-Regular |
 
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*Wave-Regular
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*Wave-Regular |
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To specify regular Airy wave loading.
Refer to Regular Airy Wave for further information on this feature.
Blocks of lines which define the wave loading parameters.
Block defining regular Airy waves for a time domain dynamic analysis. The line can be repeated as often as necessary:
Amplitude, Wave Period [, Direction] [, Phase]
Block defining a single regular Airy wave for a frequency domain dynamic analysis:
OPTION=ONE
Amplitude, Wave Period [, Direction]
Block defining multiple regular Airy waves for a frequency domain dynamic analysis:
OPTION=MANY
Amplitude[, Direction], Lower Period, Upper Period, No of Periods
To specify the amplitude, period, direction and phase of regular Airy waves.
Input: |
Description |
Amplitude: |
The regular Airy wave amplitude (MWL to crest or trough). |
Wave Period: |
The regular Airy wave period in seconds. |
Direction: |
The wave direction, measured in degrees anti-clockwise from the global Y-direction. All waves in Flexcom emanate from the origin. The default direction is 0°. |
Phase: |
The wave phase angle in degrees. This input is appropriate only if more than one regular wave is specified. The default phase value is 0°. |
To specify the amplitude, period and direction of regular Airy waves for frequency domain analysis.
Input: |
Description |
Amplitude: |
The regular Airy wave amplitude (MWL to crest or trough). This wave amplitude is used with all solution harmonic components. |
Direction: |
The wave direction, measured in degrees anti-clockwise from the global Y-direction. All waves in Flexcom emanate from the origin. The default direction is 0°. |
Lower Period: |
The lower limit of the period range of interest, in seconds. |
Upper Period: |
The upper limit of the period range of interest, in seconds. |
No. of Periods: |
The number of periods at which solutions are found including the upper and lower periods. |
(a)You can specify more than one regular Airy wave in a time domain dynamic analysis. You simply use one line of the Wave - Regular Airy table for each wave harmonic. You can also combine one or more Airy waves with a wave spectrum in the time domain.
(b)If you wish to specify more than one Airy wave in a frequency domain dynamic analysis, you must use the Frequency Domain – Wave – Regular Airy table. It is possible to specify multiple wave harmonics using the Wave - Regular Airy table, but only the first will be applied, and all subsequent ones will be ignored.
(c)As an example of the operation of the Frequency Domain – Wave – Regular Airy facility consider the following specification: unit amplitude; a direction of 0º; lower and upper periods of 5s and 25s respectively; and 21 periods specified. Then solutions will be calculated at the following periods: 5s, 6s, 7s ... 24s and 25s. However the solutions at individual harmonics are independent, unlike the situation in a random sea analysis where the solutions at all the harmonics are linked.