Accession Number : ADP003682

Title :   Feasibility of Using Modal Analysis Techniques for Nonlinear Multidegree of Freedom Systems,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Singh,R. ; Nopporn,C. ; Busby,H.

Report Date : 1984

Pagination or Media Count : 11

Abstract : Experimental modal analysis systems are now widely available and used extensively for system identification, diagnostics and mathematical model development. A typical user treats the system as a black box and generally relies on the commercial software. Moreover, he may not be aware of the underlying assumptions and the limitations associated with modal extraction and synthesis. Thus there is a potential for misusing the technique which could lead to incorrect results and conclusions. This is especially true when the structure is inherently nonlinear or when vibratory amplitudes are no longer small. The focus of this paper is to examine the feasibility of using conventional modal analysis techniques for such cases.

Descriptors :   *Structural mechanics, *Systems analysis, *Nonlinear systems, Feasibility studies, Degrees of freedom, Problem solving, Transfer functions

Distribution Statement : APPROVED FOR PUBLIC RELEASE