An Optimization Method for Excitation Parameters of Ultrasonic Infrared Thermography Crack Nondestructive Testing

摘要

#$%^&*AU2020101234A420200806.pdf#####Abstract The invention discloses an optimization method for excitation parameters of ultrasonic infrared thermography crack nondestructive testing, which comprises the following steps: 1) establish a three-dimensional model of structural parts with cracks; 2) import the three-dimensional model of structural parts into finite element software to establish the material model of structural parts; 3) divide the structural parts as a whole into meshes and discretize them; 4) set the contact pairs between the crack surfaces of the structural parts and define the contact properties; 5) load ultrasonic load and boundary conditions; 6) analyze and solve the model; 7) change the ultrasonic excitation load parameters, and return to Step 5); 8) output the influence rule report of excitation parameters; 9) perform the optimal selection of excitation parameters according to the influence rule of excitation parameters, so as to obtain the optimal portfolio of excitation parameters. The invention uses software instead of hardware for parameter optimization, does not need to use expensive hardware equipment, does not need a large amount of experimental preparations in the early stage, does not need a long, time-consuming and laborious experimental process, and has the advantages of convenience and efficiency, time-saving and labor-saving.Drawings of Descriptions Start IDeine Coupling Eleents and Cakulate Sodon Material Constants Establish the Model of Flat Plate with nv Cracks Not Mesh Generation I Dehfrne Contact y enetrad Pairs Not Define Contact Pairs N -utp Rule Report Impose Load and Boundary Condtions Optimal Portfoho of Exaftafhon DefineAnalysisarameters Types and Solution Settings End Figure 1 1/5