Structural damping calculation of wind turbine blade based on pulse excitation response
LI De-yuan
YAN Xiao-hui
MO Wen-wei
XU Lei
FANG Yu-shen
Abstract：In order to solve the aeroelastic vibration problem of large wind turbine blade,an effective analytical method for the structural damping of flexible blade of large wind turbine based on pulse response was proposed.A kind of super units with 5 degrees of freedom (DOFs)was used to discretize the flexible blade into a multi-body system (MBS)which consists of several super units,and the dynamic response model for the blade was established based on the R-W method in computing the multi-body system dynamics.The 5MW offshore wind turbine blade issued by the United States Renewable Energy Laboratory (NREL)was chosen as the research subject,and the transfer function of blade was obtained by analyzing the dynamic response of blade under the action of pulse excitation.In addition,the structural damping of blade in both flapwise and edgewise modes under the static and rotating conditions was calculated by the half-power bandwidth method in order to provide a foundation for confirming the boundary of aeroelastic stability of blade.The present study is of important significance for the design of blade structure and aerodynamic shape,and helpful for the confirmation of aeroelastic stability boundary of blade.
Keywords：wind turbineflexible bladesuper unitmulti-body systemtransfer functionhalf-power bandwidth methodaeroelastic stabilitystructural damping
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 619-624 )