Discrete-Element Acoustic Anslysis of Submerged Structures on Concurrent Computers. Volume 2
Abstract
This report documents the suitability of concurrent computation for frequency domain analysis. When the response of a system is required over a wide frequency range, an immediate increase in computation speed can be attained by assigning each frequency in the range of interest to a separate processor of the concurrent computer. The computations associated with each frequency can be carried out independently and therefore simultaneously with the others. Thus, processing speed-up is roughly proportional to the number of processors in the concurrent computer. This approach is used in discrete element computation for steady state response analysis of fluid-structure systems arising in underwater vibration, acoustic radiation and acoustic scattering problems. A brief description of the theoretical foundations and governing equations for a boundary-element/finite-element approach for the structural response and surface pressure on a vibrating submerged body is given. The computer code SWEEPS, developed for such analysis, is modified and ported to a 32 processor Ncube concurrent computer. The modified program distributes the frequency dependent computations among the processors. The computational results performed on the Ncube demonstrate a linear speedup with the number of processors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1989
- Accession Number
- ADA209328
Entities
Organizations
- Lockheed Martin Missiles and Space