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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262893.pdf


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
      Acoustics
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE