An Analytical Model For Deformation Analysis
Author(s)
H. Zhang, A. Maheri, A. Daadbin & P. Hackney
Abstract
An analytical model capable of predicting the induced deformation due to the
presence of bend-twist and stretch-twist elastic couplings in multi-cell closed
thin walled beams with arbitrary cross-sections is presented. For various
structural and material configurations, the results obtained by the developed
model are compared with the results of the finite element analysis. It is shown
that the developed analytical model provides reasonable accuracy in predicting
induced twist. The developed model is implemented in an aero-structure
simulation environment for simulation of wind turbines utilising adaptive blades.
Keywords: thin-walled beam, multi-cell closed thin walled beams, adaptive
blades, elastic coupling, bending-twist coupling, wind turbine composite blade.
1 Introduction
Fibrous composite materials have been broadly used in aeronautical and
aerospace structures due to their proven advantages, such as high strength-weight
ratios. One particular application of these materials is in fabricating smart and
adaptive aerodynamic lifting surfaces such as wind turbine adaptive blades and
aircraft smart wings. An adaptive blade acts as an open-loop controller that
senses the wind velocity or rotor speed variations and adjusts its aerodynamic
characteristics accordingly to improve the wind turbine performance. This selfcontrol
system can be achieved by implementing elastic coupling in the structure
of the blade. In order to determine the aerodynamic performance of adaptive
blades at various loading conditions, a structural analyser is required to calculate
the induced deformation of the blade. Figure 1 shows the simulation
environment for wind turbines utilising this type of blades. Torsional
of wind turbine adaptive blades
Keywords
thin-walled beam, multi-cell closed thin walled beams, adaptive
blades, elastic coupling, bending-twist coupling, wind turbine composite blade.
Related Book
Other papers in this volume
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