A Comparison of Reduced Order Modeling Techniques Used in Dynamic Substructuring.
Experimental dynamic substructuring is a means whereby a mathematical model for a substructure can be obtained experimentally and then coupled to a model for the rest of the assembly to predict the response. Recently, various methods have been proposed that use a transmission simulator to overcome sensitivity to measurement errors and to exercise the interface between the substructures; including the Craig-Bampton, Dual Craig-Bampton, and Craig-Mayes methods. This work compares the advantages and disadvantages of these reduced order modeling strategies for two dynamic substructuring problems. The methods are first used on an analytical beam model to validate the methodologies. Then they are used to obtain an experimental model for structure consisting of a cylinder with several components inside connected to the outside case by foam with uncertain properties. This represents an exceedingly difficult structure to model and so experimental substructuring could be an attractive way to obtain a model of the system.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1331902
- Report Number(s):
- SAND2015-9121C; 607792
- Resource Relation:
- Conference: Proposed for presentation at the International Modal Analysis Conference (IMAC) held January 25-28, 2016 in Orlando, FL.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Interface reduction for Hurty/Craig-Bampton substructured models: Review and improvements
Formulation of an experimental substructure model using a Craig-Bampton based transmission simulator