지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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This paper presents the results of finite element simulations of elastic wave propagation in an underwater steel plate and the verification of a proposed method utilizing elastic wave?based damage detection. For the simulation and verification, we carried out the following procedures. First, three?dimensional finite element models were constructed using a general purpose finite element program. Second, two types of damages (mechanical defects and deteriorations) were applied to the underwater steel plate and three parameters (defect location, defect width, and depth) were considered to adjust the severity of the applied damages. Third, elastic waves were generated using the oblique incident method with a Gaussian tone burst, and the response signals were obtained at the receiving point for each defect or deterioration case. In addition, the received time domain signals were analyzed, particularly by measuring the magnitudes of the maximum amplitudes. Finally, the presence and severity of each type of damage were identified by the decreasing ratios of the maximum amplitudes. The results showed that the received signals for the models had the same global pattern with minor changes in the amplitudes and phases, and the decreasing ratio generally increased as the damage area increased. In addition, we found that the defect depth was more critical than the width in the decrease of the amplitude. This mainly occurred because the layout of the depth interfered with the elastic wave propagation in a more severe manner than the layout of the width. An inverse analysis showed that the proposed method is applicable for detecting mechanical defects and quantifying their severity.
목차
ABSTRACT
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2. 유한 요소 해석
3. 결과 및 해석
4. 결론
REFERENCES
참고문헌 (15)
참고문헌 신청
1. [학술지(정기간행물)] - 정준모 / 2011 / 조선 해양 구조물용 강재의 소성 및 파단 특성 II: 파단의 이론적 배경 / 한국해양공학회지 25 (2) : 92 ~ 100
2. [학술지(정기간행물)] - Descamps, B. / 1999 / Reliability-based Methods in the Inspection Planning of Fixed Offshore Steel Structures / Journal of Constructional Steel Research 52 (1) : 117 ~ 131
3. [학술지(정기간행물)] - Dinkler, D. / 2008 / Damage detection with piezoceramic actuators in thin steel structures / Mechanics of Advanced Materials and Structures 15 (3-4) : 269 ~ 275
4. [학술지(정기간행물)] - Dowling, P. J. / 1998 / Steel Structures in the New Millenium / Journal of Constructional Steel Research 46 (1-3)
5. [학술지(정기간행물)] - Kažys, R. / 2006 / 3D Analysis of Interaction of Lamb Waves with Defects in Loaded Steel Plates / Ultrasonics 44 : e1127 ~ e1130
2. [학술지(정기간행물)] - Descamps, B. / 1999 / Reliability-based Methods in the Inspection Planning of Fixed Offshore Steel Structures / Journal of Constructional Steel Research 52 (1) : 117 ~ 131
3. [학술지(정기간행물)] - Dinkler, D. / 2008 / Damage detection with piezoceramic actuators in thin steel structures / Mechanics of Advanced Materials and Structures 15 (3-4) : 269 ~ 275
4. [학술지(정기간행물)] - Dowling, P. J. / 1998 / Steel Structures in the New Millenium / Journal of Constructional Steel Research 46 (1-3)
5. [학술지(정기간행물)] - Kažys, R. / 2006 / 3D Analysis of Interaction of Lamb Waves with Defects in Loaded Steel Plates / Ultrasonics 44 : e1127 ~ e1130
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UCI(KEPA) : I410-ECN-0101-2014-550-003351442