WIT Press


An Improved Method Of Approximating Frequency Characteristics In The Problem Of Modal Analysis And Its Applications

Price

Free (open access)

Paper DOI

10.2495/CMEM010571

Volume

30

Pages

10

Published

2001

Size

808 kb

Author(s)

S. Berczynski, M. Lachowicz, M. Pajor

Abstract

An improved method of approximating frequency characteristics in the problem of modal analysis and its applications S. Berczynski*, M. Lachowicz*, M. Pajor* Mechanical Technology Institute, Szczecin Technical University, Poland. Abstract The paper presents an improved method and an algorithm of determining modal parameters of the machine tool model and its application: of continuous description of dynamic characteristics of models of variable structure and variable parameters and of damping identification on the basis of approximated frequency characteristics. The method employs the natural form of the approximating formula for iterative calculations improving initial estimates of modal parameters. The algorithm was prepared as a linear programming problem that is solved in MATLAB system. The effectiveness of the method was evaluated by the comparison of the obtained results with those found in the effect of the application of classical methods, integrated in the MATLAB Opti

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