07/00
BW CARD
WIND SPEED AND DIRECTION
BW CARD
Field
Variable
Value
Description
0,C1-2
IC1
BW
Card group identifier
0,C3
IC3
b/
Option 1: The wind data in fields 2 and 3 of this card will be used at
all nodes equal to or greater than J1
N
Option 2: Wind data are coded by specific node
E
Option 3: Wind data are coded by element number
T
Option 4: Wind coded by IMAT number (material type)
1
J1
+
The node or element or IMAT number as specified by IC3
2
TWX(J1)
+,0
The wind velocity @ wse + 10 meters (miles/hr)
3
TAX(J1)
+,0
Direction toward which the wind is blowing, measured in degrees
counterclockwise from the positive x-axis.
For example, a SE wind, as reported by the conventional meteorological terms, blows toward the NW. This would
be an angle of 135 degrees counterclockwise form a positive x-axis (with the + x-axis oriented to the east).
X-axis
East
Note: if the raw wind direction data is given in the conventional format (i.e. direction from which the wind is
blowing, measured in degrees clockwise from the positive y-axis) the angle (θ) can be transformed to the appropriate
angle for TABS-MDS input (θ′) by applying the following conversion:
θ′ = 270 - θ
49
Previous Page
