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S21 Vibrações e Análise Modal |
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Titulo:
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IDENTIFICATION OF ELASTIC CONSTANTS BY MODAL ANALYSIS
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Resumo :
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ABSTRACT. THIS PAPER DEALS WITH ELASTIC PARAMETER IDENTIFICATION IN RECTANGULAR PLATES. A METHOD IS DESCRIBED FOR THE IDENTIFICATION OF ELASTIC PARAMETERS FROM MEASURED NATURAL FREQUENCIES OF COMPLETELY FREE PLATE. THE PARAMETER ESTIMATION PROBLEM IS SOLVED BY MINIMIZING, IN A LEAST SQUARES SENSE, THE DIFFERENCES BETWEEN MEASURED AND CALCULATED FREQUENCIES. THE NUMERICAL METHOD FOR CALCULATING THE NATURAL FREQUENCIES COMPRISES A RAYLEIGH-RITZ FORMULATION USING CHARACTERISTIC ORTHOGONAL POLYNOMIALS IN THE SERIES REPRESENTING THE DISPLACEMENT FUNCTIONS, WHICH ARE APPROPRIATED FOR REPRODUCING THE BOUNDARY COMPLETELY FREE CONDITIONS.
KEY WORDS: PARAMETER IDENTIFICATION, ELASTIC CONSTANTS, MODAL ANALYSIS
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Autores :
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Alves Borges, Lavinia Sanabio
Bastos, Sergio Ferreira
Rochinha, Fernando Alves
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Trabalho Completo :
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