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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.28 No.1
- 발행연도
- 2021.1
- 수록면
- 43 - 53 (11page)
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In this study, the modulation of multiple frequency content of a single ultrasonic wave in nonlinear structures is investigated analytically, numerically and experimentally. An experimental technique is proposed based on nonlinear lamb wave propagation in aluminum bars using piezoelectric wafer active sensors (PWAS) to study intrinsic nonlinearity of structures. First, a one-dimensional analytical procedure is developed to study the modulation of one dimensional wave with multiple-frequency content in isotropic medium with quadratic nonlinearity. This procedure is implemented to study modulation of frequency contents of a well-known tone burst signal in nonlinear medium. Then, predictions obtained by the proposed analytical procedure are compared with the results of finite element model, which show strong correlations. The experimental and analytical results reveal that in excitation with a train of tone burst, due to frequency modulation, some new harmonics including a strong sub harmonic generation with frequency of <i>f</i><sub>0</sub>/<i>N<sub>p</sub></i> appear in the response. The amplitude of this harmonic is even higher than common second harmonic generation (2<i>f</i><sub>0</sub>). This can be seen in the experimental results when the excitation frequencies are correctly selected. Finally, it is explained that, why the new sub harmonic generation is less affected by the nonlinearity induced by the excitation system.
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참고문헌 (22)
참고문헌 신청
Zimu Chen / 2014 / Mixing of collinear plane wave pulses in elastic solids with quadratic nonlinearity / The Journal of the Acoustical Society of America 136(5):2389~2404
Anthony J. Croxford / 2009 / The use of non-collinear mixing for nonlinear ultrasonic detection of plasticity and fatigue / The Journal of the Acoustical Society of America 126(5):EL117~EL122
Mingxi Deng / 1999 / Cumulative second-harmonic generation of Lamb-mode propagation in a solid plate / Journal of Applied Physics 85(6):3051~3058
Akira Hikata / 1965 / Dislocation Contribution to the Second Harmonic Generation of Ultrasonic Waves / Journal of Applied Physics 36(1):229~236
Xiaobin Hong / 2016 / Synergetics based damage detection of frame structures using piezoceramic patches / Smart Structures and Systems, An International Journal 17(2):167~194
Anthony J. Croxford / 2009 / The use of non-collinear mixing for nonlinear ultrasonic detection of plasticity and fatigue / The Journal of the Acoustical Society of America 126(5):EL117~EL122
Mingxi Deng / 1999 / Cumulative second-harmonic generation of Lamb-mode propagation in a solid plate / Journal of Applied Physics 85(6):3051~3058
Akira Hikata / 1965 / Dislocation Contribution to the Second Harmonic Generation of Ultrasonic Waves / Journal of Applied Physics 36(1):229~236
Xiaobin Hong / 2016 / Synergetics based damage detection of frame structures using piezoceramic patches / Smart Structures and Systems, An International Journal 17(2):167~194
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