Finite Element Study of Acoustic Waves.
Abstract
The generation and propagation of small amplitude acoustic waves in a homogeneous, loss-free, compressible fluid is studied by the finite element method. A diaphragm mounted in an infinite rigid baffle generates acoustic waves in a semi-infinite fluid region. Steady-state pressure distribution is found for a hemispherical region with boundary reflection suppressed through use of a radiation condition. The computer program developed for the purpose utilizes iso-parametric finite elements with curvilinear boundaries. Incorporated in the program is a versatile mesh generator which minimizes the quantity of input data. Acceptable agreement with analytic results is obtained when there are at least four elements per wave-length. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0717585
Entities
People
- Dennis Vale Dean
Organizations
- Naval Postgraduate School