Analytical determination of real normal modes from measured complex responses

Autor:	N. Niedbal
Rok vydání:	1984
Předmět:	Vibration Transformation matrix Modal Dynamic problem Normal mode Control theory Phase (matter) Mathematical analysis Resonance (particle physics) Finite element method Mathematics
Zdroj:	25th Structures, Structural Dynamics and Materials Conference.
DOI:	10.2514/6.1984-995
Popis:	Normal mode parameters are required in order to solve dynamic problems. These parameters can be determined either analytically by means of a Finite Element Method (FEM) or experimentally by means of a Ground Vibration Test or Modal Survey Test. The classical Phase Resonance Method deterines directly the undamped normal mode parameters. To overcome the problem of structures with limited accessibility, phase separation methods have to be taken into account. In order to ensure comparibility between the results of the FEM analysis and the proposed experimental method, a matrix transformation is presented to transform the damped (complex) normal mode parameters into undamped (real) normal mode parameters.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::20664a7b2b3052c943d8d661869c8faf https://doi.org/10.2514/6.1984-995 Zobrazit plný text záznamu