Tunnel lining EMD energy index damage evaluation method suitable for vibration table test

• Main Authors: YI ZHONGQIANG, MA XINGDONG, LAI TIANWEN, WU HONGGANG, YANG HAOTIAN, LIU DEREN, TIAN ZHONGXI, YIN WEIJIANG, PAI LIFANG, LIU TONG, WANG XU, TAO ZHIGANG, CUI XIAONING, MA LINA, SUN YUANWU, LAI GUOQUAN
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a tunnel lining EMD energy index damage evaluation method suitable for a vibration table test, and the method comprises the steps: 1) designing a tunnel lining acceleration sensor layout scheme, and arranging acceleration sensors; 2) filling a vibration table test model; 3) loading a seismic wave test to obtain acceleration data of the tunnel lining structure; 4) importing acceleration data, and drawing an acceleration-time curve graph; 5) carrying out EMD decomposition on the acceleration data obtained in the step 3) to obtain IMF representing intrinsic modes of the seismic signals, and carrying out HHT transformation on all the intrinsic modes; 6) comparing and analyzing empirical mode decomposition results of all orders, selecting IMF components with high amplitude, rich frequency information and balanced instantaneous frequency distribution, and performing integral calculation on the IMF components on a time axis to obtain energy E; 7) defining an EMD energy damage index according