Nonlinear Transient Thermoelastodynamics of Functionally Graded Panels Subjected to Strong Acoustic Excitations
Abstract
The focus of this investigation was on the understanding and prediction of the nonlinear geometric (large displacements) dynamic response of functionally graded panels subjected to the severe acoustic, thermal, and mechanical/aerodynamic excitations expected for hypersonic vehicles. The phenomenological analysis centered more specifically on the differences observed in the response of metallic panels and those functionally graded while a pre-existing reduced order modeling strategy was drastically enhanced to provide the needed, accurate prediction methodology. This project resulted in (1) a finite deformation elasticity based derivation of the reduced order modeling equations for cold structures delineating clearly the broad applicability of the approach; (2) the selection strategy of an appropriate and efficient basis for the representation of the full displacement field of metallic and functionally graded panels, and the extended validation of the concepts to flat and curved panels; (3) the extension of (1) in the presence of a temperature field itself represented by a modal expansion leading to a combined structural-thermal reduced order model, the latter capturing the heat convection, the selection strategy of an appropriate basis for the representation of the temperature distribution, and the validation of these concepts to steady and unsteady temperature problems; and (4) the inclusion of structural uncertainty in the reduced order model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 2010
- Accession Number
- ADA564498
Entities
People
- Marc P. Mignolet
Organizations
- Arizona State University