EM 1110-2-1100 (Part II)
30 Apr 02
T
Excitation (and response) period [time]
T
Vessel draft [length]
T
Wave period [time]
TH
Resonant period for Helmholtz mode (Equation II-7-18)[time]
Tn
Axial tension or load on a mooring line [force]
Tn , m
Natural free oscillating period (n, m is the number of nodes along the x- and y-axes
of a basin [time]
Undamped natural period of a vessel (Equation II-7-26) [time]
Tn
&
V
Average horizontal velocity at a node (Equation II-7-16) [length/time]
V10
Wind speed at the standard elevation of 10 m above the water surface [length/time]
Vc
Average current speed [length/time]
Vmax
Maximum horizontal velocity at a node [length/time]
Vr
Return flow velocity (Equation II-7-25), velocity that develops between the vessel
hull and the channel bottom and sides [length/time]
Vessel speed [length/time]
Vs
Vz
Wind speed at elevation z [length/time]
W
Breakwater's characteristic dimension in the direction of wave propagation [length]
W
Channel width [length]
X
Maximum horizontal particle excursion at a node in a standing wave (Equation II-7-
15) [length]
y
Vertical extent of the barrier below the still-water surface [length]
II-7-90
Harbor Hydrodynamics
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