Abstract
Modal is the natural characteristic of structural vibration, each mode has a specific frequencies, dam** and modal shape. Modal parameters reflect the dynamic properties of the structure. The dynamic characteristics of car-body structure play an important role to the stability and comfort of the High-speed EMU (Electric Multiple Unit). Experimental Modal Analysis (EMA) is the common method to study the structural dynamic characteristics. This paper adopts the EMA technology to analyse the high-speed EMU car-body structure. The car-body structure is supported by coil springs, which simulates the operational condition. The system uses two electromagnetic exciters to produce the excitation force, and the burst random signal is used. Two piezoelectric transducer are applied to measure the force, 285 piezoelectric acceleration sensors are used to pick up the vibration response, and the LMS-SCADA III is used to acquire data. Based on multiple-input multiple-output (MIMO) method, modal testing is performed. The PolyMAX method is utilised for extracting the modal parameters: frequencies, dam** and modal shape. The vibration characteristics of the car-body structure have been further understood through the modal parameters, which also can be used for the vibration and noise reduction design.
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References
Lu, Z.J., Tian, H.Q., Zhou, D.: Modal analysis of 270 kmh-1 high-speed motor car. China Railway Science 26(6), 18–23 (2005)
**e, X.P., Han, X., Wu, C.D.: Experimental modal analysis for a car body-in-white based on PolyMAX method. Automotive Engineering 31(5), 440–443 (2009)
Ward, H., Stefan, L., Paul, S.: Modal analysis theory and testing. Bei**g Iinstitute of Technology Press (2001)
Liu, F.Q., An, H.W.: Multiple reference frequency domain least squares (Polymax) method and its applications in the tire and vehicle body modal parameter identification. In: LMS First User Conference Proceedings (2006)
Peeters, B., Guillaume, P.: Automotive and aerospace applications of the PolyMax modal parameter estimation method. In: Proceedings of IMAC 22, The International Modal Analysis Conference, Dearborn, MI, USA (2004)
Thomas, G., Carne, D., Todd, G., Miguel, E.: Support conditions for experimental modal analysis. Sound and Vibration 303(1), 10–15 (2007)
Popprath, S., Benatzky, C., Bilik, C.: Experimental modal analysis of a scaled carbody for metro vehicles. In: The Thirteenth International Congress on Sound and Vibration (ICSV 13), Vienna,Austria (2006)
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© 2012 Springer-Verlag Berlin Heidelberg
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Ding, Y., Li, Q., Chang, Z., Zhao, W. (2012). Experimental Modal Analysis of High-Speed EMU Carbody Structure. In: Ni, YQ., Ye, XW. (eds) Proceedings of the 1st International Workshop on High-Speed and Intercity Railways. Lecture Notes in Electrical Engineering, vol 148. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27963-8_7
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DOI: https://doi.org/10.1007/978-3-642-27963-8_7
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-27962-1
Online ISBN: 978-3-642-27963-8
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