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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.2
- 수록면
- 169 - 177 (9page)
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초록· 키워드
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In this paper, the natural frequency of a cracked cantilever L-beams with a coupled bending and torsional vibrations is investigate by theory and experiment. In addition, a method for detection of crack in a cantilever L-beams is presented based on natural frequency measurements. The governing differential equations of a cracked L-beam are derived via Hamilton's principle. The two coupled governing differential equations are reduced to one sixth order ordinary differential equation in terms of the flexural displacement. Futher, the dynamic transfer matrix method is used for calculation of a exact natural frequencies of L-beams. The crack is assumed to be in the first mode of fracture and to be always opened during vibrations. In this study, the differences between the actual and predicted positions and sizes of crack are less than about 10 % and 39.5 % respectively.
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참고문헌 (16)
참고문헌 신청
1. [학술지(정기간행물)] - Nandwana, B. P. / 1997 / Detection of Location and Size of a Crack in Stepped Cantilever Beam Based on Measurement of Natural Frequencies / Journal of Sound and Vibration 203 : 435 ~ 446
2. [학술지(정기간행물)] - Patil, D. P. / 2003 / Detection of Multiple Cracks Using Frequency Measurements / Engineering Fracture Mechanics 70 : 1553 ~ 1572
3. [학술지(정기간행물)] - Datta, P. K / 1992 / Parametric Instability of a Non-prismatic Bar with Localized Damage Subjected to an Intermediate Periodic Axial Load / Computers and Structures 4 (6) : 1199 ~ 1202
4. [학술지(정기간행물)] - Ruotolo, R. / 1996 / Harmonic Analysis of The Vibrations of a Cantilevered Beam with a Closing Crack / Computers and Structures 61 (6) : 1057 ~ 1074
5. [학술지(정기간행물)] - Chondros, T. G. / 1998 / A Continuous Cracked Beam Vibration Theory / Journal of Sound and Vibration 215 (1) : 17 ~ 34
2. [학술지(정기간행물)] - Patil, D. P. / 2003 / Detection of Multiple Cracks Using Frequency Measurements / Engineering Fracture Mechanics 70 : 1553 ~ 1572
3. [학술지(정기간행물)] - Datta, P. K / 1992 / Parametric Instability of a Non-prismatic Bar with Localized Damage Subjected to an Intermediate Periodic Axial Load / Computers and Structures 4 (6) : 1199 ~ 1202
4. [학술지(정기간행물)] - Ruotolo, R. / 1996 / Harmonic Analysis of The Vibrations of a Cantilevered Beam with a Closing Crack / Computers and Structures 61 (6) : 1057 ~ 1074
5. [학술지(정기간행물)] - Chondros, T. G. / 1998 / A Continuous Cracked Beam Vibration Theory / Journal of Sound and Vibration 215 (1) : 17 ~ 34
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