Resonances of an elastic plate in a compressible confined fluid |
| |
Authors: | Bonnet-Ben Dhia, Anne-Sophie Mercier, Jean-Francois |
| |
Affiliation: | (Laboratoire POEMS, UMR 2706 CNRS/ENSTA/INRIA, ENSTA, 32 boulevard Victor, 75739 Paris cedex 15, France) |
| |
Abstract: | We present a theoretical study of the resonances of a fluid–structureproblem, an elastic plate placed in a duct in the presence ofa compressible fluid. The case of a rigid plate has been largelystudied. Acoustic resonances are then associated to resonantmodes trapped by the plate. Due to the elasticity of the plate,we need to solve a quadratic eigenvalue problem in which theresonance frequencies k solve the equations (k) = k2, where are the eigenvalues of a self-adjoint operator of the formA + kB. First, we show how to study the eigenvalues locatedbelow the essential spectrum by using the min–max principle.Then, we study the fixed-point equations. We establish sufficientconditions on the characteristics of the plate and of the fluidto ensure the existence of resonances. Such conditions are validatednumerically. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|