Bridge structure dynamic monitoring method, system and equipment based on frequency coupling

The invention discloses a bridge structure dynamic monitoring method, system and equipment based on frequency coupling, and the method comprises the steps: calculating a frequency value in a non-damage state and an actually measured acceleration signal through a finite element model, carrying out the inversion of the actually measured frequency value of a bridge structure, and comparing the frequency value with the actually measured acceleration signal. According to the method, the bridge structure is identified on the whole, damage prediction can be effectively carried out, judgment can be rapidly carried out, early warning can be timely carried out, and bridge structure safety and life and property safety are ensured. Empirical mode decomposition can be rapidly, simply and directly carried out on an unknown signal without pre-analysis and research, the unknown signal can be automatically decomposed according to an inherent mode in a hierarchical manner, manual setting and intervention are not needed, errors