Arch dam underwater damage identification method, terminal equipment and storage medium

The invention relates to the technical field of dam structure health diagnosis, in particular to an arch dam underwater damage identification method, terminal equipment and a storage medium. The method comprises: obtaining a tiny vibration video of a dam top of a damaged arch dam under the action of a discharge load; decomposing the shot dam crest vibration video to obtain local phase information of the video; obtaining arch dam natural frequency and arch dam vibration mode information according to the local phase information; and importing the natural frequency of the arch dam and the vibration mode information of the arch dam into a pre-constructed damage identification model to obtain the underwater damage range, damage degree and damage position information of the arch dam. The dynamic characteristics of the arch dam can be obtained through the tiny vibration video of the dam top of the arch dam under the action of the discharge load, the arch dam refinement model and the dynamic damage database are estab