Accession Number:

AD0618673

Title:

THREE-DIMENSIONAL (BEAM-SHELL-SPRUNG BODY) VIBRATION ANALYSIS OF NS SAVANNAH,

Descriptive Note:

Corporate Author:

DAVID TAYLOR MODEL BASIN WASHINGTON D C

Report Date:

1965-04-01

Pagination or Media Count:

135.0

Abstract:

The normal modes of coupled vertical, transverse, and longitudinal flexural vibrations and the steadystate damped response were calculated by means of a passive electrical-analog computer for surface ship NS SAVANNAH using a three-dimensional beam-shellsprung body analysis similar to that applied to aircraft. This ship was selected as a case study because of the many test results, data, and calculations available for this ship. Vertical flexural vibrations based upon beam theory were also computed by a digital computer. To demonstrate the techniques involved in making a threedimensional analysis, the methods and data used in the calculations and the results obtained are presented. Results show that significant reductions in vibration amplitudes can be achieved by such methods as damping or inertia coupling, which directly affect the sharpness of the structural resonance peaks. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE