How do you calculate equivalent dynamic bearing load for combined radial and axial loads?

Equivalent dynamic load P = X.Fr + Y.Fa, where Fr is radial load, Fa is axial load, X is radial load factor, and Y is axial load factor. X and Y values depend on the ratio Fa/(V.Fr) and bearing geometry (from manufacturer catalogs). For light axial loads (Fa/Fr < e), typically X=1, Y=0. For significant axial loads, X decreases and Y increases. V is rotation factor (1 for inner ring rotating, 1.2 for outer ring rotating).