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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
- 2013.4
- 수록면
- 56 - 62 (7page)
이용수
초록· 키워드
오류제보하기
A technique is presented that uses a circular waveguide for the measurement of the bulk shear (S-wave) velocities of unconsolidated, saturated media, with particular application to near surface soils. The technique requires the measurement of the attenuation characteristics of the fundamental torsional mode that propagate along an embedded pipe, from which the acoustic properties of the surrounding medium are inferred. From the dispersion curve analysis, the feasibility of using fundamental torsional mode which is non-dispersive and have constant attenuation over all frequency range is discussed. The principles behind the technique are discussed and the results of an experimental laboratory validation are presented. The experimental data are best fitted for the different depths of wetted sand and the shear velocities are evaluated as a function of depths. Also the characteristics of the reflected signal from the defects are examined and the reflection coefficients are calculated for identifying the relation between defect sizes and the magnitude of the reflected signal.
목차
Abstract
1. 서론
2. 가진 모드의 선정
3. 축토양의 벌크 전단속도
4. 결함 반사 계수
5. 결론
참고문헌
참고문헌 (12)
참고문헌 신청
1. [학술지(정기간행물)] - R. Long. / 2001 / Monitoring Acoustic Wave Propagation in Buried Cast Iron Water Pipes / Review of Progress in Quantitative NDE 20B : 1202 ~ 1209
3. [학술지(정기간행물)] - H. Kwun. / 2004 / Torsional Guided Wave Attenuation in Coal-Tar-Enamel-Coated Buried Piping / NDT&E International 37 : 663 ~ 665
4. [학술지(정기간행물)] - J. Hua. / 2011 / Guided Wave Propagation in Single and Double Layer Hollow Cylinders Embedded in Infinite Media / Journal of Acoustical Society of America 129 : 691 ~ 700
5. [단행본] - ASTM Standard D-4428/D-4428-94. / 1994 / Standard Test Methods for Cross-hole Seismic Testing / American Society for Testing Materials : 885 ~ 898
6. [학술지(정기간행물)] - R. Long. / 2003 / Attenuation Characteristics of the Fundamental Modes that Propagate in Buried Iron Water Pipes / Ultrasonics 41 : 509 ~ 519
3. [학술지(정기간행물)] - H. Kwun. / 2004 / Torsional Guided Wave Attenuation in Coal-Tar-Enamel-Coated Buried Piping / NDT&E International 37 : 663 ~ 665
4. [학술지(정기간행물)] - J. Hua. / 2011 / Guided Wave Propagation in Single and Double Layer Hollow Cylinders Embedded in Infinite Media / Journal of Acoustical Society of America 129 : 691 ~ 700
5. [단행본] - ASTM Standard D-4428/D-4428-94. / 1994 / Standard Test Methods for Cross-hole Seismic Testing / American Society for Testing Materials : 885 ~ 898
6. [학술지(정기간행물)] - R. Long. / 2003 / Attenuation Characteristics of the Fundamental Modes that Propagate in Buried Iron Water Pipes / Ultrasonics 41 : 509 ~ 519
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UCI(KEPA) : I410-ECN-0101-2014-500-003596194