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Mechanics in Engineering ›› 2009, Vol. 31 ›› Issue (2): 50-54.doi: 10.6052/1000-0879-2008-023

• Application study • Previous Articles     Next Articles

ESTIMATING THRESHOLDS OF DAMAGES BASED ON NATURAL FREQUENCY METHOD

  

  • Received:2008-01-07 Revised:2008-02-25 Online:2009-04-08 Published:2009-04-08

Abstract: The damage thresholds obtained by natural frequency method can be used as a criterion to justify the usefulness of practical engineering structure. The natural frequency method consists of analyzing the influential factors of the damage, and a cantilever beam model is taken as an example. Both numerical and theoretical results indicate that, if the frequency measurement error is known, this method can be used to estimate the thresholds, during the early period of damage. The thresholds obtained by this method agree with the numerical results very well.

Key words: transfer matrix, natural frequency, cantilever beam,