Accession Number : AD0648359

Title :   CROSS-CORRELATION IN STRUCTURAL VIBRATION.

Descriptive Note : Final technical rept.,

Corporate Author : MEASUREMENT ANALYSIS CORP LOS ANGELES CALIF

Personal Author(s) : White,Pritchard H.

Report Date : 31 JUL 1966

Pagination or Media Count : 102

Abstract : The use of cross-correlation as a tool for analyzing vibration in complex structures was examined. Starting from basic principles, the equations governing propagation of waves and the cross-correlation of these waves were generated. Dispersive and non-dispersive waves in single and multipath systems were examined. Based upon the theoretical results, and confirmed by laboratory experiments, it appears that cross-correlation performed in one-third or one octave frequency bands is a useful tool for examining structural noise and vibration transmission. Under some circumstances shaping of the spectra is necessary to assure a flat cross spectrum over the frequency band of interest. (Author)

Descriptors :   (*STRUCTURES, VIBRATION), (*CORRELATION TECHNIQUES, WAVE PROPAGATION), SOUND TRANSMISSION, NOISE, BANDWIDTH

Subject Categories : Acoustics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE