AQWA Wind Force Coefficients

- March 7, 2022 at 9:46 am
  
  jaevin10
  Subscriber
  
  Hi,
  What is the orientation of the coefficient direction in ANSYS AQWA?
  Is to the positive x-direction (0-degrees) and to the negative x-direction (180-degrees) ?
  Or the direction is measured counter clockwise from the x-direction where X-positive is 0 degrees and Y-positive is 90 degrees?
- March 7, 2022 at 3:26 pm
  
  Mike Pettit
  Ansys Employee
  
  The Current/Wind Force Coefficients are initially defined parallel to the global axes, but they rotate with the structure. For example, given the following Current Force Coefficient data:
  Applying a Current of 1 m/s in 0-degree direction (i.e. Current is travelling in positive x direction), then the initial Current X force on the stationary structure will be 100 N x (1 m/s)^2 = 100 N.
  If I fix the structure position with a hinge joint and there is some moment causing the structure to rotate counter-clockwise about that hinge, as it passes through RZ = 90 degrees, the Current X force will be 200 N.
  Does this answer your question?
  Mike

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