Development of Random Response Analysis Capability for the VAST Finite Element Program - Phase 1
Abstract
This report contains a description of the work done in the first phase of a contract awarded by the Defence Research Establishment Atlantic (DREA) for the provision of an in-house random response analysis capability. A concise description of the theoretical basis of the finite element random vibration analysis methodology is given. A description of available procedures for computing the assembled cross-spectral density matrix for a finite element model of structures excited by distributed random loads is also presented. Special emphasis is given to marine structures subjected to random pressure loads induced by random ocean waves. Computer programs for performing random vibration analysis developed during the course of this work have been incorporated into the VAST finite element program as a new module called RANVIB. A suite of computer programs for the generation of random loads for ship structures were also developed. Descriptions of all programs together with operational procedures and input data preparation are provided. Example problems illustrating the operation of RANVIB are given. The report also gives some remarks about the capabilities developed and recommendations for future work.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1991
- Accession Number
- AD1003686
Entities
People
- I. R. Orisamolu
- M. E. Norwood
- M. W. Chernuka