Author : Charles W. Ehnes
Publisher :
ISBN 13 : 9781423547860
Total Pages : 67 pages
Book Rating : 4.5/5 (478 download)
Book Synopsis Damping in Stiffener Welded Structures by : Charles W. Ehnes
Download or read book Damping in Stiffener Welded Structures written by Charles W. Ehnes and published by . This book was released on 2003-06-01 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Damping of welded structures is a subject of great interest and application for the navy as relates to ship shock survivability and acoustic transmission of ship noise, The purpose of this research is to study the effects of welding on damping A generic model of a warship's hull structure was used to study damping effects, The model's natural frequencies and mode shapes were calculated using a finite element model prior to model testing, The frequency response and natural frequencies of the model were determined experimentally by exciting the model and measuring the response throughout the structure using Frequency Response Functions (FRF's), The results were compared with the finite element modeling The damping ratio of the model in relation to position from excitation was calculated using the half-power point method and then a more detailed analysis of frequency dependent damping versus position was made using modal parameter extraction using the Complex Exponential Method,