期刊
CANADIAN GEOTECHNICAL JOURNAL
卷 46, 期 7, 页码 792-812出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/T09-026
关键词
perzoceramic element; bender-extender; laboratory measurement; shear wave; compression wave
资金
- Defense Science and Technology Agency [PTRC-CEE/DSTA/2006.01]
- Nanyang Technological University [RG81/05]
Piezoceramic elements have been used for laboratory measurement of wave velocity in soil and rock specimens. Shear-wave piezoceramic elements (bender elements) are commonly used to measure shear wave velocity for the determination of small-strain shear modulus. Compression-wave piezoceramic elements (extender elements), on the other hand, are less commonly used as compression wave velocity is less frequently measured. In this paper, the performance of a pair of bender-extender elements for the determination of both shear and compression wave velocities is examined with respect to the resolution of the recorder, bender-extender element size. and excitation voltage frequency. The evaluation showed that the performance of the bender-extender elements test can be improved by considering the following conditions: (i) the digital oscilloscope used to record the bender-extender element signals should have a high analog to digital (A/D) conversion resolution; (ii) the size of the bender-extender elements plays an important role in the strength and quality of the receiver signal, especially for compression waves; and (iii) using a wave path length to wavelength ratio of 3.33 enables a more reliable determination of shear wave velocity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据