Target modal identification method and system based on vibration mode animation

The invention discloses a target modal identification method and system based on vibration mode animation. The method comprises the following steps: setting a judgment condition according to the characteristics of a target modal; checking a plurality of modal shapes of the structure along a first observation direction, and obtaining a plurality of shape animations to be identified and distinguished; analyzing and processing the to-be-identified vibration mode animations: selecting one unanalyzed and processed vibration mode animations from the plurality of to-be-identified and distinguished vibration mode animations as the current vibration mode animations, analyzing and processing each frame of picture of the current vibration mode animations, judging whether a judgment condition is met or not, if not, judging the number of the vibration mode animations, and otherwise, judging the number of the vibration mode animations; if yes, skipping to an identified target mode; judging the number of the vibration mode