1.제목 : CHARACTERISTICS AND IDENTIFICATIONS OF GUIDED WAVE MODES


FOR NDE


2. 연사 : 신 현 재 교수


3. 일시 : 1999년 9월 10일 11:00-12:00


4. 장소 : 301동 1512호


5. 내용 :


Characteristics of guided waves were briefly discussed and the concept of guided wave mode identification using short time Fourier transforms was introduced. The relationship between short time Fourier transform diagrams and guided wave group velocity dispersion diagrams was revealed. The group velocity corresponded to the time of flight in short time Fourier transform diagrams. Experimental group velocity dispersion patterns were obtained from short time Fourier transforms, and well agreed with theoretical results. And the effectiveness of short time Fourier transforms in the identifications of not only guided wave modes but also frequency bandwidth.


6. 연사 약력 :


1982 - 1986 B.S., Physics, Kyung Pook National University


1986 - 1988 M.S., Physics (Acoustics), Sungkyunkwan University


1993 - 1997 Ph.D., Engineering Science and Mechanics (Ultrasonics),


The Pennsylvania State University , USA


현재, 성균관대학교 산업설비 안전진단 연구센터


(SAFE center)


7. 연락처 : 기계항공공학부 김윤영 교수 (전화 : 880-7154)