Study of an acoustic field simulation of a temperature field excited by ultrasonic waves through a concrete specimen

摘要

Given that the temperature rise mechanism of defective areas under ultrasonic excitation is not yet definite, the method of using the thermal diffusion equation to solve the ultrasonically-excited transient temperature field is not applicable to the study of concrete structures. Therefore, a method of using acoustic field simulation to study the ultrasonically-excited temperature field of concrete structures is proposed as an aid in resolving actual engineering problems, such as the design plan for the excitation layout of large-scale structures, defect misdiagnosis and secondary damage, which is triggered by excessive input energy. Based on appropriate analysis, this article focuses on the acoustic energy distribution rule of ultrasonic waves within the boundary area of two distinct media. Thus, favourable consistency has been obtained between the simulation results and the test phenomenon, demonstrating and validating the feasibility of the sound field simulation method.