Accession Number : ADA319911

Title :   The Effect of Nonlinearities on Flexible Composite Structures.

Descriptive Note : Final rept. 15 Mar 92-14 Mar 95,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIEN CE AND MECHANICS

Personal Author(s) : Nayfeh, Ali H. ; Mook, Dean T.

PDF Url : ADA319911

Report Date : 07 JUL 1995

Pagination or Media Count : 27

Abstract : The present report attempts to present a comprehensive review of achievements made under the support of AFOSR on the effect of nonlinearities on flexible composite structures. The research was focused on the mechanisms by which energy is transferred from high- to low-frequency modes. The report is focused on some recent experiments. conducted with the AFOSH support that reveal a perspective of the mechanisms by which energy is transferred from high- to low-frequency modes is presented. The focus is on some recent experiments that reveal how a low-amplitude high-frequency excitation can produce a large-amplitude low-frequency response. Such a phenomenon is potentially harmful, if not catastrophic. Specifically. these experiments clarify the role of internal resonances, combination external and parametric resonances, and the interactions among modes of widely spaced frequencies.

Descriptors :   *ENERGY TRANSFER, *FLEXIBLE STRUCTURES, PARAMETRIC ANALYSIS, STRUCTURAL ANALYSIS, STRUCTURAL MECHANICS, COMPOSITE STRUCTURES, POWER SPECTRA, NONLINEAR SYSTEMS, STRUCTURAL RESPONSE, TORSION, CANTILEVER BEAMS.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE