148 J. Furlich et al. Acknowledgements The authors of this paper would like to acknowledge the project sponsor Ford Motor Company for their support of this research and endeavor. References 1. Ewins, D.J.: Modal Testing: Theory, Practices, and Application. Research Studeis Press, Philadelphia (2000) 2. Heylen, W., Lammens, S., Sas, P.: Modal Analysis Theory and Testing. Katholieke Universiteit Leuven, Departement Werktuigkunde, Leuven (1997) 3. Blevins, R.D.: Formulas for Natural Frequency and Mode Shape. Van Nostrand Reinhold Company, New York (1979) 4. Avitabile, P.: How free does a test need to be? Does it really matter that much? In: SEM Experimental Techniques (2012) 5. Avitabile, P.: Can the test setup have an effect on the measured modal data? In: SEM Experimental Techniques (2001)
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