Damage identification in prestressed structures using phase trajectories

The work deals with the utilization the to the diagnostics of prestressed structures. Considered in work damage were: change (the decrease) the tension force as well as the crack in the prestressed element. Phase trajectories were determined by simulation on analytical BernoulliEuler model of beam. In order to compare the sensitivity proposed method of diagnosis (changes in phase trajectories) the other vibro-based damage detection symptoms are shown (the first natural frequency).