@article{chen_experimental_2021,
	title = {Experimental and numerial study of high-order complex curvature mode shape and mode coupling on a three-bladed wind turbine assembly},
	volume = {160},
	issn = {0888-3270},
	url = {https://www.sciencedirect.com/science/article/pii/S0888327021002685},
	doi = {10.1016/j.ymssp.2021.107873},
	abstract = {Experimental and numerial modal analysis on wind turbine blades has been previously studied, considering mainly low order bending modes. However, high-order modes are also critical modes for understanding blade dynamics. The mode coupling is essential because a better understanding of the high-frequency blade dynamics can support advances in model validation, blade aeroelastic simulations, blade design, and structural health monitoring. However, these high-order modes and the associated mode couplings of wind turbine blades have not been studied. This work presents a comprehensive experimental and numerial study based on three modal tests and a correlated finite element simulation to study the complex curvature mode shapes and mode coupling dynamics for a three-bladed wind turbine assembly. Three tests are conducted: Test 1, ten accelerometers are deployed on the whole assembly under impact excitation; Test 2, nine accelerometers are deployed on a single blade under impact excitation; and Test 3, a non-contact 3D Scanning Laser Doppler Vibrometer (SLDV) test is performed on a single blade under shaker excitation. This is the first work to use a 3D SLDV for an experimental modal test on the wind turbine blade. With 300–400 points measured with the 3D SLDV, experimental mode shapes having a high spatial resolution with 3D response are used to characterize the coupling for the low-order and high-order modes with complex curvatures. A reliable finite element model of the three-bladed assembly, including the composite blade modeling, is also developed and is well correlated with Test 2 and Test 3. With the high-fidelity 3D SLDV test and well-correlated finite element model, this is also the first work of using experimental and numerial approaches to investigate the high-order mode shape with complex curvatures and mode coupling of bending and torsional behavior that is present in the wind turbine blade for these high-order modes.},
	language = {en},
	urldate = {2021-04-07},
	journal = {Mechanical Systems and Signal Processing},
	author = {Chen, Yuanchang and Escalera Mendoza, Alejandra S. and Griffith, D. Todd},
	month = nov,
	year = {2021},
	keywords = {3D Scanning Laser Doppler Vibrometer (SLDV), Correlation, Dynamic response, Finite Element Model, Modal testing and analysis, Mode coupling, Wind turbine blade},
	pages = {107873},
}

{"_id":"GbEry6FDgwuRPnHZ8","bibbaseid":"chen-escaleramendoza-griffith-experimentalandnumerialstudyofhighordercomplexcurvaturemodeshapeandmodecouplingonathreebladedwindturbineassembly-2021","author_short":["Chen, Y.","Escalera Mendoza, A. S.","Griffith, D. T."],"bibdata":{"bibtype":"article","type":"article","title":"Experimental and numerial study of high-order complex curvature mode shape and mode coupling on a three-bladed wind turbine assembly","volume":"160","issn":"0888-3270","url":"https://www.sciencedirect.com/science/article/pii/S0888327021002685","doi":"10.1016/j.ymssp.2021.107873","abstract":"Experimental and numerial modal analysis on wind turbine blades has been previously studied, considering mainly low order bending modes. However, high-order modes are also critical modes for understanding blade dynamics. The mode coupling is essential because a better understanding of the high-frequency blade dynamics can support advances in model validation, blade aeroelastic simulations, blade design, and structural health monitoring. However, these high-order modes and the associated mode couplings of wind turbine blades have not been studied. This work presents a comprehensive experimental and numerial study based on three modal tests and a correlated finite element simulation to study the complex curvature mode shapes and mode coupling dynamics for a three-bladed wind turbine assembly. Three tests are conducted: Test 1, ten accelerometers are deployed on the whole assembly under impact excitation; Test 2, nine accelerometers are deployed on a single blade under impact excitation; and Test 3, a non-contact 3D Scanning Laser Doppler Vibrometer (SLDV) test is performed on a single blade under shaker excitation. This is the first work to use a 3D SLDV for an experimental modal test on the wind turbine blade. With 300–400 points measured with the 3D SLDV, experimental mode shapes having a high spatial resolution with 3D response are used to characterize the coupling for the low-order and high-order modes with complex curvatures. A reliable finite element model of the three-bladed assembly, including the composite blade modeling, is also developed and is well correlated with Test 2 and Test 3. With the high-fidelity 3D SLDV test and well-correlated finite element model, this is also the first work of using experimental and numerial approaches to investigate the high-order mode shape with complex curvatures and mode coupling of bending and torsional behavior that is present in the wind turbine blade for these high-order modes.","language":"en","urldate":"2021-04-07","journal":"Mechanical Systems and Signal Processing","author":[{"propositions":[],"lastnames":["Chen"],"firstnames":["Yuanchang"],"suffixes":[]},{"propositions":[],"lastnames":["Escalera","Mendoza"],"firstnames":["Alejandra","S."],"suffixes":[]},{"propositions":[],"lastnames":["Griffith"],"firstnames":["D.","Todd"],"suffixes":[]}],"month":"November","year":"2021","keywords":"3D Scanning Laser Doppler Vibrometer (SLDV), Correlation, Dynamic response, Finite Element Model, Modal testing and analysis, Mode coupling, Wind turbine blade","pages":"107873","bibtex":"@article{chen_experimental_2021,\n\ttitle = {Experimental and numerial study of high-order complex curvature mode shape and mode coupling on a three-bladed wind turbine assembly},\n\tvolume = {160},\n\tissn = {0888-3270},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0888327021002685},\n\tdoi = {10.1016/j.ymssp.2021.107873},\n\tabstract = {Experimental and numerial modal analysis on wind turbine blades has been previously studied, considering mainly low order bending modes. However, high-order modes are also critical modes for understanding blade dynamics. The mode coupling is essential because a better understanding of the high-frequency blade dynamics can support advances in model validation, blade aeroelastic simulations, blade design, and structural health monitoring. However, these high-order modes and the associated mode couplings of wind turbine blades have not been studied. This work presents a comprehensive experimental and numerial study based on three modal tests and a correlated finite element simulation to study the complex curvature mode shapes and mode coupling dynamics for a three-bladed wind turbine assembly. Three tests are conducted: Test 1, ten accelerometers are deployed on the whole assembly under impact excitation; Test 2, nine accelerometers are deployed on a single blade under impact excitation; and Test 3, a non-contact 3D Scanning Laser Doppler Vibrometer (SLDV) test is performed on a single blade under shaker excitation. This is the first work to use a 3D SLDV for an experimental modal test on the wind turbine blade. With 300–400 points measured with the 3D SLDV, experimental mode shapes having a high spatial resolution with 3D response are used to characterize the coupling for the low-order and high-order modes with complex curvatures. A reliable finite element model of the three-bladed assembly, including the composite blade modeling, is also developed and is well correlated with Test 2 and Test 3. With the high-fidelity 3D SLDV test and well-correlated finite element model, this is also the first work of using experimental and numerial approaches to investigate the high-order mode shape with complex curvatures and mode coupling of bending and torsional behavior that is present in the wind turbine blade for these high-order modes.},\n\tlanguage = {en},\n\turldate = {2021-04-07},\n\tjournal = {Mechanical Systems and Signal Processing},\n\tauthor = {Chen, Yuanchang and Escalera Mendoza, Alejandra S. and Griffith, D. Todd},\n\tmonth = nov,\n\tyear = {2021},\n\tkeywords = {3D Scanning Laser Doppler Vibrometer (SLDV), Correlation, Dynamic response, Finite Element Model, Modal testing and analysis, Mode coupling, Wind turbine blade},\n\tpages = {107873},\n}\n\n","author_short":["Chen, Y.","Escalera Mendoza, A. S.","Griffith, D. 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