@Article{EE.2020.010666,
AUTHOR = {Ajay Veludurthi, Venkateshwarlu Bolleddu},
TITLE = {Experimental Study on Modal and Harmonic Analysis of Small Wind Turbine Blades Using NACA 63-415 Aerofoil Cross-Section},
JOURNAL = {Energy Engineering},
VOLUME = {117},
YEAR = {2020},
NUMBER = {2},
PAGES = {49--61},
URL = {http://www.techscience.com/energy/v117n2/38705},
ISSN = {1546-0118},
ABSTRACT = {This work focused on modal and harmonic analysis of small wind 
turbine blades taken from the NACA 63415 series. The sandwich structure type 
composite blade is fabricated from GFRP and epoxy with Uni-vinyl hard foams of 
different alignments as stiffeners. In this work, the modal and harmonic analysis 
of different varieties of blades like solid, hallow and rectangular alignment blades 
is carried out by the finite element method using ANSYS 18.1 software. From 
Finite Element Analysis, the natural frequencies, amplitudes and mode shapes are 
obtained. Based on the working principle of wind turbine blades, the boundary 
conditions are applied. The experimental investigation is also done using a 
vibration test rig with specially designed fixtures. The forced vibration approach 
is used to analyze the responses of the blade with different forces and frequencies 
which gives the feasible study to define the effective blade structure. In addition 
to modal analysis, the harmonic analysis is also carried out for different materials 
to find the amplitude at different frequencies. The outcome of this analysis can be 
used as a reference for improving the structure and material properties of the blade.},
DOI = {10.32604/EE.2020.010666}
}