Conducting an experimental modal test on a wind turbine attached to a tower is very challenging due to the size of these structures, number of sensors required, accessibility to desired measurement locations, time required for testing, and cost. Therefore, having an insight into the effects of the coupled turbine/tower and correlating the dynamic characteristics of an assembled wind turbine to experimentally measured modes of an individual blade or modes of a turbine disconnected from the tower is desirable. In this paper, the effects of boundary conditions on the dynamic behavior of a wind turbine are numerically and experimentally studied. Furthermore, the mode contribution matrix of the wind turbine assembled to the tower is used to identify the contributions of the modal vectors of the tower and three-bladed turbine to the dynamic characteristics of the assembled wind turbine.
BaqersadJNiezreckiCAvitabileP.Predicting full-field dynamic strain on a three-bladed wind turbine using three dimensional point tracking and expansion techniques. SPIE Smart Structures and Materials+ Nondestructive Evaluation and Health Monitoring, pp. 90612P–90612P–90613.
2.
HoaSV. (1979) Vibration of a rotating beam with tip mass. Journal of sound and vibration, 67: 369–381.
3.
PetersDARossowMPKornAKoT. (1986) Design of helicopter rotor blades for optimum dynamic characteristics. Computers and Mathematics with Applications, 12: 85–109.
4.
ShenJMasaratiPRogetBPiatakDJSingletonJDNixonMW. Modeling a stiff-inplane tiltrotor using two multibody analyses: A validation study. 64th Annual Forum – AHS International, pp. 2307–2315.
5.
BirG.Blades and towers modal analysis code (BModes): Verification of blade modal analysis capability. 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition.
6.
CuiYShiLZhaoF.Modal analysis of wind turbine blade made of composite laminated plates. Asia-Pacific Power and Energy Engineering Conference, APPEEC2010.
7.
BechlyMEClausenPD. (1997) Structural design of a composite wind turbine blade using finite element analysis. Computers and Structures, 63: 639–646.
8.
AlhamaydehMHussainS. (2011) Optimized frequency-based foundation design for wind turbine towers utilizing soilstructure interaction. Journal of the Franklin Institute, 348: 1470–1487.
9.
PaquetteJLairdDGriffithDTRipL.Modeling and testing of 9 m research blades. 44th AIAA Aerospace Sciences Meeting2006, pp. 14569–14581.
10.
YeZMaHBaoNChenYDingK. (2001) Structure dynamic analysis of a horizontal axis wind turbine system using a modal analysis method. Wind Engineering, 25: 237–248.
11.
DeinesKMarinoneTSchultzRFarinholtKParkG.Modal analysis and SHM investigation of CX-100 wind turbine blade. 29th IMAC, a Conference on Structural Dynamics, 2011, pp. 413–438.
12.
MarinoneTLeBlancBHarvieJNiezreckiCAvitabileP.Modal testing of 9 m CX-100 turbine blades. 30th IMAC, A Conference on Structural Dynamics, 2012, pp. 351–358.
13.
PaulsenUSSchmidtTErneO.Developments in large wind turbine modal analysis using point tracking videogrammetry. 28th IMAC, A Conference on Structural Dynamics, 2010, pp. 187–198.
14.
OzbekMRixenDJErneOSanowG. (2010) Feasibility of monitoring large wind turbines using photogrammetry. Energy, 35: 4802–4811.
15.
LundstromTBaqersadJNiezreckiCAvitabileP.Using high-speed stereophotogrammetry techniques to extract shape information from wind turbine/rotor operating data. 30th IMAC, A Conference on Structural Dynamics, 2012, pp. 269–275.
16.
LundstromTBaqersadJNiezreckiC.Using high-speed stereophotogrammetry to collect operating data on a Robinson R44 Helicopter. 31st International Modal Analysis Conference on Structural Dynamics, IMAC2013, pp. 401–410.
17.
AllemangRJBrownDL. Correlation coefficient for modal vector analysis. Proceedings of the 1st International Modal Analysis Conference & Exhibit., pp. 110–116.
18.
ThibaultLAvitabilePFoleyJRWolfsonJ.Equivalent reduced model technique development for nonlinear system dynamic response. 30th IMAC, A Conference on Structural Dynamics, 2012, pp. 95–127.
19.
BaqersadJCarrJLundstromTNiezreckiCAvitabilePSlatteryM.Dynamic characteristics of a wind turbine blade using 3D digital image correlation. Health Monitoring of Structural and Biological Systems2012.
20.
XiongLXianminZGangqiangLYanCZhiquanY. (2010) Dynamic response analysis of the rotating blade of horizontal axis wind turbine. Wind Engineering, 34: 543–560.
21.
ZhaoXMaißerPWuJ. (2007) A new multibody modelling methodology for wind turbine structures using a cardanic joint beam element. Renewable Energy, 32: 532–546.
LoPiccoloJCarrJNiezreckiCAvitabilePSlatteryM.Validation of a finite element model used for dynamic stress-strain prediction. 30th IMAC, A Conference on Structural Dynamics, 2012, pp. 205–214.
24.
BaqersadJNiezreckiCAvitabilePSlatteryM.Dynamic characterization of a free-freewind turbine blade assembly. 31st International Modal Analysis Conference on Structural Dynamics, IMAC2013, pp. 303–312.
25.
BaqersadJPoozeshPNiezreckiCAvitabileP.Comparison of Modal Parameters Extracted Using MIMO, SIMO, and Impact Hammer Tests on a Three-Bladed Wind Turbine. 32th IMAC, A Conference on Structural Dynamics.
26.
CarrJDyasSErtsosMLoPiccoloJNonisCRomanoJ.Static and Dynamic Testing of a 7-ft. Wind Turbine Blade. University of Massachusetts Lowell, James B. Francis College of Engineering, Department of Mechanical Engineering, Capstone Design. (2011).
