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The wave force co-efficients, drag and added mass,
can be specified independently for each member or using
member range. The coefficients are relative to the member
local co-ordinate system.
Marine growth and current velocity profiles are specified
relative to the mean water level and are described as
a discrete set of data points. The magnitude of the
current at other elevations is determined by direct
interpolation or extrapolation of the data. Alternatively,
current flow continuity can be selected. The marine
growth is only applied to the members within the profile
range that is specified.
The program computes the wave surface profile, wave
celerity and wave length.
The wave loading intensity along the members is assumed
to be linear varying over a segment length. The accuracy
is controlled by user by specifying the appropriate
number of segments along the members or by using the
auto-segmentation option.
The program generates a STAAD.Pro loading data
comprising of equivalent simple beam joint loads for
buoyancy; wave loading intensities on structural members,
and joint loads for wave loading on appurtenances. The
structures deadweight can be generated by STAAD.Pro.
Other output files include the structure base force
summaries. There is an option in the program to neglect
the overturning moments at the base that are caused
by the vertical forces. This allows the vertical wave
force effects to be quantified.
The wave forces are calculated from Morison’s equation
using either Stream Functions, Stokes 5th Order, or
Airy linear theory, to compute the particle velocities
and accelerations, or a user defined Grid of velocities
and accelerations.
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