Accession Number:

ADA272890

Title:

The Evaluation of Transmission Efficiency and Coupling Loss Factor of Structural Junctions

Descriptive Note:

Technical rept.,

Corporate Author:

MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)

Personal Author(s):

Report Date:

1993-08-01

Pagination or Media Count:

31.0

Abstract:

The evaluation of transmission efficiency of structural junctions forms an important part in the study of structure-borne noise as it provides the basis for identifying and quantifying the vibration paths in the structure. In this report, analytical methods for evaluating the transmission efficiency of structural junctions including plate-plate and plate-beam junction are described. The calculation of coupling loss factor from the transmission efficiency of a junction for Statistical Energy Analysis SEA is also described. Sample calculations of transmission efficiencies on a number of structural junctions are presented. It is found that for typical naval ship constructions that consist of plates coupled to light thin beams, the elastic vibrations of the beams have a significant effect on the transmission efficiency.

Subject Categories:

  • Marine Engineering
  • Structural Engineering and Building Technology
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE