A theoretical and experimental analysis is made of the behaviour of a double pendulum with viscoelastic hinges subjected to a follower force. The effects of variations in the masses, stiffnesses, geometry and the internal and external velocity-dependent forces on the stability of the system are examined in detail. The picture that emerges shows all these factors to be important. In all cases, instability occurs in the first mode of flutter motion and the results accurately confirm theoretical predictions.
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