ON THE USE OF THE GENERAL BANDWIDTH METHOD TO IDENTIFY DAMPING IN MDOF SYSTEMS

Authors

  • Dinh Huong Vu Institute of Techniques for Special Engineering, Le Quy Don Technical University, Hanoi, Vietnam

DOI:

https://doi.org/10.56651/lqdtu.jst.v7.n01.834.sce

Keywords:

Damping identification, general bandwidth method, half-power bandwidth method, MDOF systems, frequency response function

Abstract

The general bandwidth (GeB) method is one of the methods used for viscous damping identification of structures. In this method, approximate and exact formulas have been studied to estimate the damping ratio from frequency response function (FRF) of the single degree-of-freedom (SDOF) system. However, the applicability of these formulas to estimate the damping in multi degree-of-freedom (MDOF) systems has not been analyzed in detail. This article studies the influence of modal parameters on the accuracy of the GeB method used to identify the viscous damping ratios in MDOF systems. The results compared with the formulas based on the half-power bandwidth (HPB) method show that the GeB method has good efficiency and wide identification range.

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Published

2024-07-04

Issue

Vol. 7 No. 01 (2024)

Section

Articles