STRESS AND VIBRATION ANALYSIS OF THE SWATH VESSEL "FREDERICK G. CREED"

PDF

Authors
  1. Kumar, R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Mantle Engineering Co Inc, Alexandria VA (US)
Abstract
This report describes the work performed in application of finite element methods to a structural evaluation of the SWATH vessel Frederick G. Creed. The evaluation consisted of a stress analysis of a major bulkhead and determination of the global natural frequencies of the vessel. The analysis was performed by the finite element codes MAESTRO and VAST. The stress analysis has been conducted using the prescribed displacement method (top down approach). The maximum von Mises stress and maximum first principle stress in the bulkhead at Frame 11 due to a lateral point load of 1000 lb. are located below the door opening, and the magnitude of these stresses is 75,00 lb square inch and 91.00 lb square inch respectively. The vibration analysis of the SWATH has been conducted by both MAESTRO and VAST. The frequencies of the lower hull due to lateral vibration are between 4 and 15 CPS. The main deck and the cabins of the vessel vibrate at frequencies between 20 and 30 CPS.
Keywords
MAESTRO finite element codes;Small Waterplane Area Twin Hull Vessels;First principles;CREED
Report Number
DREA-CR-92-448 — Contractor Report
Date of publication
01 Jul 1992
Number of Pages
66
DSTKIM No
95-02275
CANDIS No
151395
Format(s):
Document Image stored on Optical Disk;Hardcopy

Permanent link

Document 1 of 1

Date modified: