A sensor placement strategy based on an enhanced damage localization method in beam-like structures: Saddle Point Criteria

Abstract

The sensor deployment is one of the concerns in structural health monitoring. A novel sensor placement strategy based on a sensitivity-based damage detection method is presented. An existing damage detection method is simplified and adapted for multiple damages and different type of beam-like structures and proved to be appropriate numerically. Depending on the noise in the response and restricted measurement, the results show the validity of the damage identification method using the first three modes. However, the method has limitations due to the saddle points in the parameter. To cope with the limitation in the proposed damage detection method, a sensor deployment scheme is proposed. Contrary to counterpart procedures, the method neither depends on an optimization algorithm nor a physical model of the system. The sensor placement strategy is related to the deployment of accelerometers and strain gauges/Large Area Electronics at the same time.