Analysis of Structural Vibrations of Vertical Axis Wind Turbine Blades via Hamilton's Principle - Part 1: General Formulation

摘要

Energy harvesting by wind turbines is of great concern in many countries/areas, yet its safety is inevitably related to the structural vibration of the turbine system. In this study, we present a complete linear analysis of structural vibrations for vertical axis wind turbines (VAWTs) based on Euler's beam theory by Lagrangian mechanics. The un-deformed blade is assumed to be vertically straight. There are several findings from solving the resultant equations which represent four dimensions of deformation, involving motion: lateral bending-chordwise bendingaxial torsion-axial extension (BBTE)