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Theoretical analysis of HVAC duct hanger systemsSeveral methods are presented which, together, may be used in the analysis of duct hanger systems over a wide range of frequencies. The finite element method (FEM) and component mode synthesis (CMS) method are used for low- to mid-frequency range computations and have been shown to yield reasonably close results. The statistical energy analysis (SEA) method yields predictions which agree with the CMS results for the 800 to 1000 Hz range provided that a sufficient number of modes participate. The CMS approach has been shown to yield valuable insight into the mid-frequency range of the analysis. It has been demonstrated that it is possible to conduct an analysis of a duct/hanger system in a cost-effective way for a wide frequency range, using several methods which overlap for several frequency bands.
Document ID
19870017813
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Miller, R. D. (NKF Engineering Associates, Inc. Vienna, VA, United States)
Date Acquired
September 5, 2013
Publication Date
August 1, 1987
Publication Information
Publication: COSMIC, 15th NASTRAN (R) Users' Colloquium
Subject Category
Structural Mechanics
Accession Number
87N27246
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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