Abstract
The traditional approach to evaluating the linear dynamic behavior of structures for modal validation is based on the acquisition of frequency response functions and their modal analysis. With small modifications, a similar technique can be used to validate nonlinear response predictions. The use of nonlinear dynamic analysis of flange joints for sealing and wear predictions makes it necessary to also provide validation information for the localised nonlinear mechanisms at the contact surface. For this purpose, a technique based on two Laser Doppler Vibrometers has been developed. The experimental set-up can provide data of the relative out-of-plane displacement of the bolted flange joint during a vibration cycle, which indicates contact separation and permanent gap locations. The observed influence of different excitation levels and bolt torques on the global and local dynamic response led to an understanding of the nonlinear behaviour of the flange and of the local contact conditions.
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References
Petrov EP, Ewins DJ (2004) Generic friction models for time-domain vibration analysis of bladed disks. Trans ASME J Turbomach 126(1):184–92
Petrov EP, Ewins DJ (2002) Analytical formulation of friction interface elements for analysis of nonlinear multiharmonic vibrations of bladed discs. ASME J Turbomach 125:364–371.
Zucca S, Firrone CM, Gola MM (2012) Numerical assessment of friction damping at turbine blade root joints by simultaneous calculation of the static and dynamic contact loads. Nonlinear Dyn 67(3):1943–1955.
Firrone CM, Zucca S, Gola M (2009) Effect of static/dynamic coupling on the forced response of turbine bladed disks with underplatform dampers. In: Proceedings of the ASME turbo expo, 8–12 June 2009, Orlando, FL, USA, GT2009–59905
Cigeroglu E, An N, Menq CH (2007) Wedge damper modeling and forced response prediction of frictionally constrained blades. In: Proceedings of the ASME turbo expo, 14–17 May 2007, Montreal, Canada, GT2007–27963
Petrov EP (2008) Explicit finite element models of friction dampers in forced response analysis of bladed disks. J Eng Gas Turbines Power 130(2):022502
Charleux D, Gibert C, Thouverez F, Dupeux J (2006) Numerical and experimental study of friction damping in blade attachments of rotating bladed disks. Int J Rotat Mach Article ID 71302: 1–13
Petrov EP, Ewins DJ (2006) Effects of damping and varying contact area at blade-disc joints in forced response analysis of bladed disc assemblies. ASME J Turbomach 128:403–410
Chen JJ, Menq CH (2001) Prediction of periodic response of blades having 3D nonlinear shroud constraints. ASME J Eng Gas Turbines Power 123:901–909
Petrov EP (2004) A method for use of cyclic symmetry properties in analysis of nonlinear multiharmonic vibrations of bladed discs. Trans ASME J of Turbomach 126:175–183.
Kerschen G, Worden K, Vakakis AF, Golinval JC (2006) Past, present and future of nonlinear system identification in structural dynamics. Mech Syst Signal Process 20(3):505–592
Ma X, Bergman L, Vakakis A (2001) Identification of bolted joints through laser vibrometry. J Sound Vib 246(3):441–460
Perinpanayagam S, Robb D, Ewins DJ, Barragan JM (2004) Non-linearities in an aero-engine structure: from test to design. In: Proceedings of the 2004 international conference on noise and vibration engineering, ISMA, Leuven, Belgium pp 3167–3181
Salles L, Blanc L, Thouverez F, Gouskov AM (2011) Dynamic analysis of fretting-wear in friction contact interfaces. Int J Solids Struct 48(10):1513–24
Schwingshackl CW, Petrov EP (2012) Modelling of flange joints for the nonlinear dynamic analysis of gas turbine engine casings. In: Proceedings of the ASME turbo expo, Copenhagen, Denmark, 11–15 June 2012, GT2012–69281
Gola MM, Braga dos Santos M, Tong L (2012) Measurement of the scatter of underplatform damper hysteresis cycle: experimental approach. In: Proceedings of the ASME 2012 international design engineering technical conferences & computers and information in engineering conference, Chicago, IL, USA, 12–15 August 2012
Pau M, Baldi A, Leban B (2008) Visualization of contact areas in bolted joints using ultrasonic waves. Exp Tech 32(4):49–53
Boeswald M, Link M (2003) Experimental and analytical investigations of non-linear cylindrical casing joints using base excitation testing. In: Proceedings of international modal analysis conference 2003, IMAC XXI, Kissimmee, FL
Schwingshackl CW, Massei L, Zang C, Ewins DJ (2010) A constant scanning LDV technique for cylindrical structures: simulation and measurement. Mech Syst Signal Process 24(2):394–405
Halkon BJ, Rothberg SJ (2006) Vibration measurements using continuous scanning laser vibrometry: Advanced aspects in rotor applications. Mech Syst Signal Process 20(6):1286–99
Ewins DJ (2000) Modal testing: theory, practice, and application, 2nd edn. Research Studies Press, Baldock, Hertfordshire/Philadelphia
Acknowledgements
The authors are grateful to Rolls-Royce Plc. and Campusworld/Università Politecnica delle Marche for providing the financial support for this work.
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© 2013 The Society for Experimental Mechanics, Inc.
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Ruffini, V., Schwingshackl, C.W., Green, J.S. (2013). LDV Measurement of Local Nonlinear Contact Conditions of Flange Joint. In: Kerschen, G., Adams, D., Carrella, A. (eds) Topics in Nonlinear Dynamics, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series, vol 35. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6570-6_14
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DOI: https://doi.org/10.1007/978-1-4614-6570-6_14
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