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Load type > Mean drag

Definition of a wind loading across the element axis (wind direction normal to the axis). (Drag force q = cd * Rho * v^2 / 2)

SettingDescription
From, To, Step Element series to be loaded
Assembly Alternative to load assignment via element series: Name of the assembly to be loaded. The specified load is applied to every element of the specified assembly.
Rho Air density (tons per volume unit)
Note: No default value. The density must be explicitly specified. (Value appr. 0.00125 t/m^3; mass unit always tons t, cannot be changed)
Alpha Attack angle (angle of incidence, angle between the local z-axis of the element and the wind direction, positive from +z to the wind direction in direction +y
Note: Loads in negative z-direction may be modeled either by defining an  attack angle of 180° or by specifying a negative drag coefficient
v-beg Wind velocity at element begin
v-end Wind velocity at element end
Note: The load intensity  q = cd * Rho * v^2 / 2 is calculated for the  element begin and element end, and then applied as trapezoidal load
cd Drag coefficient
cd' Derivation of drag coefficient with respect to alpha (irrelevant for static loading).
Options: None, Mult. by CS width, Mult. by CS depth
  • None: Area included in the drag coefficient (q = cd * Rho * v^2 / 2)
  • Mult. By CS width: Drag coefficient related to the cross-section width b (q = cd * b * Rho * v^2 / 2)
  • Mult. By CS depth: Drag coefficient related to the cross-section depth h (q = cd * h * Rho * v^2 / 2)
[OK+Series] To continue with further input of the same load type