Abstract
Experimental component mode synthesis (CMS) seeks to measure the fundamental modes of vibration of a substructure and develop a structural dynamics model of an as-built structural component through modal testing. Experimental CMS has the potential to circumvent laborious and costly substructure model development and calibration in lieu of a structural dynamics model obtained directly from experimental measurements. Previous efforts of interfacing an experimental CMS model with a production finite element code proved cumbersome. Recently an improved “Craig-Mayes” approach casts an experimental CMS model in the familiar Craig-Bampton form. This form is easily understood by analysts and more readily interfaced with non-trivial, discrete finite element models. The approach/work-flow for interfacing an experimental Craig-Mayes CMS model with the Sierra analysis framework is discussed and the procedure is demonstrated on a verification problem.
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy National Nuclear Security Administration under Contract DE-AC04-94AL85000.
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Abbreviations
- CMS:
-
Component mode synthesis
- FE:
-
Finite element(s)
- M:
-
Mass matrix
- TS:
-
Transmission simulator
References
Reese, G., Bhardwaj, M., Walsh, T.: Sierra Structural Dynamics-Theory Manual. Sandia National Laboratories, Albuquerque (2014)
Sierra Structural Dynamics Development Team: Sierra Structural Dynamics-User’s Notes. Sandia National Laboratories, Albuquerque (2014)
Craig, R.R., Bampton, M.C.: Coupling of substructures for dynamic analysis. AIAA J. 6(7), 1313–1319 (1968)
Mayes, R.L.: A Craig-Bampton experimental dynamic substructure using the transmission simulator method. In: Proceedings of the 32nd International Modal Analysis Conference, Orlando, February 2015
Allen, M.S., Kammer, D.C., Mayes, R.L.: Experimental based substructuring using a Craig-Bampton transmission simulator model. In: Proceedings of the 32nd International Modal Analysis Conference, Orlando, February 2014
Sjaardema, G.D.: GJOIN: a program for merging two or more GENESIS databases, SAND92-2290 (1992)
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© 2016 The Society for Experimental Mechanics, Inc.
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Owens, B.C., Mayes, R.L. (2016). Verification of Experimental Component Mode Synthesis in the Sierra Analysis Framework. In: Allen, M., Mayes, R., Rixen, D. (eds) Dynamics of Coupled Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-29763-7_1
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DOI: https://doi.org/10.1007/978-3-319-29763-7_1
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