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- W4312913655 abstract "Abstract Most offshore wind turbines are installed using the so-called single blade installation procedure. This means that after the tower, nacelle, and hub are installed, the rotor blades are mounted individually. This process step is difficult and sometimes leads to delays because relative motions between the hub and rotor blade need to be small and predictable to enable the successful mounting of the blade. Previously published measurements showed that the tower vibrates in a motion where the nacelle moves in “orbits” that often change shape and axis direction. In this work, we present a simple vibration model that captures some characteristics of the tower dynamics. The model represents the tower and the nacelle as two planar rigid bodies that are connected with a torsional spring. It has three degrees of freedom: the first body’s motion in x- and y-direction and the second body’s rotation around the first body. An offset between the second body’s center of mass and its point of rotation couples the translation of the first body with the rotation of the second body. For some configurations of the parameters that describe mass distribution, stiffness, and geometry, the model produces motion similar to wind turbines during installation: orbits that change in shape and direction. These complex motions occur even without external forcing. For other configurations, however, the tower vibrates in a stationary orbit." @default.
- W4312913655 created "2023-01-05" @default.
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- W4312913655 date "2022-06-05" @default.
- W4312913655 modified "2023-09-27" @default.
- W4312913655 title "A Three Degrees of Freedom Vibration Model for a Partially Installed Wind Turbine" @default.
- W4312913655 doi "https://doi.org/10.1115/omae2022-79081" @default.
- W4312913655 hasPublicationYear "2022" @default.
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