Accession Number : ADA262893
Title : Well-Posedness of a Model for Structural Acoustic Coupling in a Cavity Enclosed by a Thin Cylindrical Shell
Descriptive Note : Contractor rept.
Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
Personal Author(s) : Banks, H T ; Smith, R C
Report Date : Mar 1993
Pagination or Media Count : 23
Abstract : A fully coupled mathematical model describing the interactions between a vibrating thin cylindrical shell and an enclosed acoustic field is presented. Because the model will ultimately be used in control applications involving piezoceramic actuators, the loads and material contributions resulting from piezoceramic patches bonded to the shell are included in the discussion. Theoretical and computational issues lead to the consideration of a weak form of the modeling set of partial differential equations (PDE's) and through the use a semigroup formulation, well-posedness results for the system model are obtained.
Descriptors : *TURBOFAN ENGINES , *TURBOPROP ENGINES , *SHELLS(STRUCTURAL FORMS) , *ACOUSTIC FIELDS , *CERAMIC MATERIALS , MATHEMATICAL MODELS , INTERACTIONS , PIEZOELECTRIC MATERIALS , DIFFERENTIAL EQUATIONS , ACTUATORS , NOISE REDUCTION , ACOUSTICS , PARTIAL DIFFERENTIAL EQUATIONS , CYLINDRICAL BODIES , FORMULATIONS , MATERIALS , VIBRATION , MODELS
Subject Categories : Ceramics, Refractories and Glass
Jet and Gas Turbine Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE