Lu,
Is your axis of rotation the shaft axis or the coning axis? They are different and to my simple mind the crux of the confusion typifying this current debate.
For the rest,
The motion of individual blades in a dynamically interactive rotor system is extremely complex. For easier understanding of low order interactions, we tend to employ explanations based on models of other more simplistic systems. For example: when we are discussing the effects of coning in relation to the coning axis, we use Coriolis and the Ballet/Ice Dancer model; whereas when we are discussing the effects of tilting the coning axis in relation to the shaft axis, we use Hookes Joint Effect and the reversing semi-trailer model (for those of you who have ever wondered why the motion and the engine noise is sinusoidal at low RPM).
When you attempt to deal with the system and all of its interactions as a simultaneous observation, it is just too hard. If, however, you doubt me, get yourself a simple dynamics text like Bramwell, Gessow & Myers or Stepniewski & Keys and look at the equations of motion and the stress/vibration equations.
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Stay Alive,
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