Monitoring method for local damage of structure

The embodiment of the invention discloses a monitoring method for local damage of a structure, and the method comprises the steps: constructing an elastic wave regulation and control structure, and forming an elastic wave regulation and control frequency band; arranging a sensor and an actuator to form an elastic wave regulation and control device; measuring a target structure FRF curve through simple harmonic excitation; correcting the formation condition of the loss valley of the FRF curve by the elastic wave regulation and control structure, and setting the FRF curve when the target structure is not damaged as a standard FRF curve; performing damage analysis, and determining a target monitoring frequency and a damage monitoring index; local damage monitoring is carried out, damage index measured values are counted, and the local damage condition of the whole target structure is judged by analyzing damage index changes. According to the technical scheme provided by the embodiment of the invention, the probl