A combined finite element and boundary integral formulation for solution via CGFFT of 2-dimensional scattering problems
- Author:
- Volakis, John L.
- Published:
- Sep 1, 1989.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Collins, Jeffery D.
- Access Online:
- hdl.handle.net
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
- Summary:
- A new technique is presented for computing the scattering by 2-D structures of arbitrary composition. The proposed solution approach combines the usual finite element method with the boundary integral equation to formulate a discrete system. This is subsequently solved via the conjugate gradient (CG) algorithm. A particular characteristic of the method is the use of rectangular boundaries to enclose the scatterer. Several of the resulting boundary integrals are therefore convolutions and may be evaluated via the fast Fourier transform (FFT) in the implementation of the CG algorithm. The solution approach offers the principle advantage of having O(N) memory demand and employs a 1-D FFT versus a 2-D FFT as required with a traditional implementation of the CGFFT algorithm. The speed of the proposed solution method is compared with that of the traditional CGFFT algorithm, and results for rectangular bodies are given and shown to be in excellent agreement with the moment method.
- Collection:
- NASA Technical Reports Server (NTRS) Collection.
- Note:
- Document ID: 19900000997.
Accession ID: 90N10313.
NAS 1.26:184781.
UMICH-025921-6-T.
NASA-CR-184781. - Terms of Use and Reproduction:
- No Copyright.
- Access Online:
- hdl.handle.net
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