The vibration of structures is a very common phenomenon, and obtaining vibration information of bridges can effectively analyze their health status. To identify local damage to the structure, using a camera to capture vibrations of the structure, this study uses the optical flow method to calculate the displacement, frequency, and mode shape of the structure from spatiotemporal sequence images. A local weighted modal strain energy change rate index can be calculated, and structural damage can be identified by comparing the energy change rate before and after damage. A cantilever beam was employed to test the way. The results show that the optical flow method correlates well with numerical simulation results, with a maximum error of 5% based on structure frequency. With a weighted modal strain energy change rate index, it is easier to determine the damage location; Comparing different damage degrees of the same unit yields the size of the damage degree.


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    Title :

    Weighted Modal Strain Energy Damage Identification Based on Image Sequences


    Additional title:

    Lect.Notes Mechanical Engineering


    Contributors:
    Yadav, Sanjay (editor) / Kumar, Harish (editor) / Wan, Meher (editor) / Arora, Pawan Kumar (editor) / Yusof, Yusri (editor) / Zheng, Jiayan (author) / Chen, Hailin (author) / Liu, Haijing (author) / Luo, Renwei (author) / Li, Heng (author)

    Conference:

    International conference on Advancement in Materials, Manufacturing, and Energy Engineering ; 2022 ; Xi'an, China September 23, 2022 - September 25, 2022



    Publication date :

    2023-08-09


    Size :

    13 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English





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