Damage Identification Dependence on Number of Vibration Modes Using Mode Shape Curvature Squares

Proceedings of the XIII International Conference on Motion and Vibration Control XII International Conference on Recent Advances in Structural Dynamics 2016
Rims Janeliukštis, Sandris Ručevskis, Miroslaw Wesolowski, Andris Čate

In this paper a damage identification algorithm for multiple damage sites based on mode shape curvature square method of vibration mode shapes in aluminium beam is reported. The required mode shape curvature of a healthy structure was obtained via interpolation of mode shape curvature of a damaged structure with Fourier series functions of different orders. Algorithm employed calculations of standardized damage index distributions over beam coordinate. Finite element simulations of proposed methodology involving various artificial noise levels and reduction of mode shape input data points were validated on the damage identification results of experimentally measured mode shapes which were measured using scanning laser vibrometer. Results show that the algorithm is capable of capturing the areas of damage. The term called damage estimate reliability was introduced in terms of likelihood of the chosen approximation function to capture the location of damage.

Atslēgas vārdi
damage, mode shape, Fourier series, vibrometer

Janeliukštis, R., Ručevskis, S., Wesolowski, M., Čate, A. Damage Identification Dependence on Number of Vibration Modes Using Mode Shape Curvature Squares. No: Proceedings of the XIII International Conference on Motion and Vibration Control XII International Conference on Recent Advances in Structural Dynamics, Lielbritānija, Southampton, 3.-6. jūlijs, 2016. Southampton: University of Southampton, 2016, 1.-12.lpp.

Publikācijas valoda
English (en)