ABSTRACT
Damage assessment of structures includes estimation of location and severity of damage using changes of dynamic properties (natural frequencies, damping ratios and modal shapes) determined on undamaged and damaged structure. The basic principle is to use dynamic properties of a structure as indicators of any change of its stiffness and/or mass. In this paper, a new method for damage detection based only on mode shape data is presented to identify damage for plate like structures. A new method is based on comparison of normalised modal shape vectors determined in undamaged and damaged state of the structure. The validity of the proposed method is demonstrated on numerical model. Accuracy of the method is analysed on nine different damage scenarios simulated by local change of elasticity modulus and change in boundary conditions.
