Automatic inspection power transmission tower modal parameter identification method and system

• Main Authors: ZHAO CHAO, WEI SITONG, SUN QING, SU YOUHUA, YIN YAO, FENG YUHU, ZHU YANMING
• Format: Patent
• Language: Chinese; English
• Published: 14.03.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING

The invention provides an automatic inspection power transmission tower modal parameter identification method and system, and the method comprises the steps: converting the acceleration response data of each measurement point of a to-be-identified structure into the natural vibration frequency of a to-be-detected structure based on a dynamic differential equation, obtaining the power spectrum of the to-be-identified structure, and obtaining the initial natural vibration frequency of each measurement point of the to-be-identified structure; performing coherence analysis on the initial natural vibration frequencies of any two measuring points to obtain a plurality of coherence initial natural vibration frequency peak points with coherence functions between 0.8 and 1; clustering analysis is conducted on the multiple coherent initial natural vibration frequency peak points, the coherent initial natural vibration frequency peak points within the clustering recognition range are selected as real natural vibration f