Wind turbine's tower-nacelle model with magnetorheological tuned vibration absorber

Abstract

The paper addresses the design of laboratory test rig of wind turbine's tower-nacelle model with horizontally aligned magnetorheological tuned vibration absorber. Several model constraints are fulfilled. Test rig design is featured and described. Its main elements are: vertical stiff rod (a tower) and a system of steel plates and blocks that is fitted rigidly at rod's top (a nacelle), connected horizontally via a spring and MR damper with an additional mass of vibration absorber. The nacelle is excited horizontally, forcing tower bending modes of vibration. The rod itself may be either fitted rigidly at its bottom to the ground and excited horizontally at an arbitrary height by the second shaker, or laid on the steel plate being excited horizontally.