Optimal Test Condition by Ultrasonic Simulation

J. Ocean Eng. Technol. 1999;13(4):45-54.

Huh, Sun-Chul;Park, Young-Chul;Boo, Myung-Hwan;Kang, Jung-Ho;

초음파 시뮬레이션을 이용한 최적의 탐상조건

허선철;박영철;부명환;강정호;

동아대학교 기계공학과 대학원;동아대학교 기계공학과;동아대학교 기계공학과 대학원;동북대학 대학원;

Keywords: Ultrasonic Test(UT), Simulation, Oblique Transducer, CRT Display, Non Destructive Test

핵심용어: 초음파 탐상시험, 시뮬레이션, 사각탐촉자, 탐상도형, 비파괴 시험

Abstract

Non destructive test is applied to revise mechanical strength and assume material strength or defect of material, equipment and structure, instead of fracture test. Especially, ultrasonic test has the characteristics such as an excellent permeability high-sensitiveness to fine defect and an almost exact measurement for position, size and direction of inner defect which differ from other non destructive tests. In this study, the program is developed to evaluate optimal testing condition, to distinguish obstacle echo and defect position. This program on the basic of Ray-Tracing model shows generation and processing of ultrasonic pulse. The simulation is compared with testing in the 3 cases of an oblique angle transducer like $45^{circ},;60^{circ};and;70^{circ}$. The test result for all conditions is well compared with simulation result when relative not is within $0.1{sim}7.2%$. And the course of several echos is simply assumed through simulation.