= 0 , i.e., x axis is the loading directionA Cartesian coordinate system (X,Y,Z) is used to describe the bearing geometry and load vector. However, the bearing dynamic coefficients (stiffness and damping coefficients) can be calculated in any coordinate system (x,y,z) by specifying a Coefficient Coordinate Angle in the bearing input data. The Coordinate Angle is measured from the X-axis (used to describe the bearing geometry) to x-axis (used to describe the bearing coefficients).
If the Lund’s convention is used to be the coordinate system, two most commonly used Coefficient Coordinate Angle are:
1. = 0 , i.e., x axis is the loading direction
2. = 90 , i.e., negative y axis is the loading direction
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