Energy Finite Element Analysis (EFEA) Algorithms and Software for Ship Noise
Abstract
This Phase I report explores the feasibility of using Energy Finite Element Analysis (EFEA) methods for structural acoustic applications. Using both Statistical Energy Analysis (SEA) and experimental results as benchmarks, the steady-state power flow capabilities EFEA software are demonstrated. Results obtained via the power flow finite element approach are generally in good agreement with those obtained elsewhere. Development and implementation of capabilities for predicting reverberant interior and underwater-radiated noise (including machinery- and flow-related) are also discussed. A number of recommendations are outlined concerning further improvements to the EFEA software that would enhance its attractiveness as a provisional tool for EFEA. The ideal implementation would be a hybrid system of EFEA and SEA for the analysis and understanding of ship noise and vibration. The EFEA approach would be appropriate for structureborne energy flow in and around the source, where the vibration gradient is high, and the SEA approach would be appropriate for modeling the transport of energy away from the machinery space.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 2005
- Accession Number
- ADA437544
Entities
People
- David Brennan
- Layton Gilroy
- Leo Boroditsky
- Mae Seto
- Ray Fischer
- T. E. Dunbar
- T. S. Koko
- U. O. Akpan