Physical Condition Monitoring of an Angle Section Thin-Walled Curved Beam Based on Non-destructive Assessment

摘要

This paper presents an integrated approach to monitor the physical condition of an angle section curved beam based on the estimation of the crack parameters, namely amount of the damage intensity and location. This approach of identification is established by integrating the response surface methodology (RSM) and genetic algorithm (GA). Numerical finite element (FE) model of the cracked beam has been connected to the present approach to carry out trial experiments to generate response surface functions (RSFs) for free, forced, and heterogeneous dynamic response data. Thereafter, the errors between the computed response surface functions and measured dynamic response data have been minimized using GA to obtain the crack parameters. The varying location and damage intensity of a single crack has been considered in the present study. The present approach has been found to reveal excellent accuracy in guessing of crack parameters and shows great potential in the crack identification, as it requires only the current response data of the cracked beam.