A Short-Bar Combined-Wave Method for Wave Propagation Coefficient Determination.
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| Title: | A Short-Bar Combined-Wave Method for Wave Propagation Coefficient Determination. |
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| Authors: | Fan, L. F.1 (AUTHOR) fanlifeng@bjut.edu.cn, Yang, Q. H.1 (AUTHOR), Wang, M.1 (AUTHOR), Du, X. L.1 (AUTHOR) |
| Source: | Rock Mechanics & Rock Engineering. Mar2024, Vol. 57 Issue 3, p1815-1823. 9p. |
| Subjects: | Impact testing, Stress waves, Wavenumber, Attenuation coefficients, Theory of wave motion, Pendulums |
| Abstract: | A combined-wave method which can significantly reduce the length of the rock bar was proposed for investigating the stress wave propagation through micro-defected rock mass. A series of short-bar pendulum impact tests were carried out to obtain the combined waves. Subsequently, wave propagation coefficients (e.g. the attenuation coefficient and wave number) were derived based on the present combined-wave method. Finally, the present combined-wave method was validated using the traditional separated-wave method based on a series of long-bar pendulum impact tests. The results show that the wave propagation coefficients obtained by the present combined-wave method using a 0.6 m bar agree well with those obtained by the traditional separated-wave method using a 1.2 m bar. The present combined-wave method overcomes the disadvantage of the traditional separated-wave method, which requires a long bar to prevent wave superposition. Highlights: A series of short-bar pendulum impact tests were conducted. A combined-wave method based on short-bar pendulum impact tests was proposed. The present combined-wave method was validated. Wave propagation coefficient can be determined by the present method efficiently. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | A combined-wave method which can significantly reduce the length of the rock bar was proposed for investigating the stress wave propagation through micro-defected rock mass. A series of short-bar pendulum impact tests were carried out to obtain the combined waves. Subsequently, wave propagation coefficients (e.g. the attenuation coefficient and wave number) were derived based on the present combined-wave method. Finally, the present combined-wave method was validated using the traditional separated-wave method based on a series of long-bar pendulum impact tests. The results show that the wave propagation coefficients obtained by the present combined-wave method using a 0.6 m bar agree well with those obtained by the traditional separated-wave method using a 1.2 m bar. The present combined-wave method overcomes the disadvantage of the traditional separated-wave method, which requires a long bar to prevent wave superposition. Highlights: A series of short-bar pendulum impact tests were conducted. A combined-wave method based on short-bar pendulum impact tests was proposed. The present combined-wave method was validated. Wave propagation coefficient can be determined by the present method efficiently. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 07232632 |
| DOI: | 10.1007/s00603-023-03647-y |
