Low-Frequency Acoustic Signals Propagation in Buried Pipelines
| Parent link: | Journal of Physics: Conference Series Vol. 671 : Innovations in Non-Destructive Testing (SibTest 2015).— 2016.— [012031, 6 p.] |
|---|---|
| Prif Awdur: | |
| Awdur Corfforaethol: | |
| Awduron Eraill: | |
| Crynodeb: | Title screen The article deals with the issues concerning acoustic signals propagation in the large-diameter oil pipelines caused by mechanical action on the pipe body. Various mechanisms of signals attenuation are discussed. It is shown that the calculation of the attenuation caused only by internal energy loss, i.e, the presence of viscosity, thermal conductivity and liquid pipeline wall friction lead to low results. The results of experimental studies, carried out using the existing pipeline with a diameter of 1200 mm. are shown. It is experimentally proved that the main mechanism of signal attenuation is the energy emission into the environment. The numerical values of attenuation coefficients that are 0,14- 0.18 dB/m for the pipeline of 1200 mm in diameter, in the frequency range from 50 Hz to 500 Hz, are determined. Режим доступа: по договору с организацией-держателем ресурса |
| Cyhoeddwyd: |
2016
|
| Pynciau: | |
| Mynediad Ar-lein: | http://dx.doi.org/10.1088/1742-6596/671/1/012031 http://earchive.tpu.ru/handle/11683/33738 |
| Fformat: | Electronig Pennod Llyfr |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=647175 |
| Crynodeb: | Title screen The article deals with the issues concerning acoustic signals propagation in the large-diameter oil pipelines caused by mechanical action on the pipe body. Various mechanisms of signals attenuation are discussed. It is shown that the calculation of the attenuation caused only by internal energy loss, i.e, the presence of viscosity, thermal conductivity and liquid pipeline wall friction lead to low results. The results of experimental studies, carried out using the existing pipeline with a diameter of 1200 mm. are shown. It is experimentally proved that the main mechanism of signal attenuation is the energy emission into the environment. The numerical values of attenuation coefficients that are 0,14- 0.18 dB/m for the pipeline of 1200 mm in diameter, in the frequency range from 50 Hz to 500 Hz, are determined. Режим доступа: по договору с организацией-держателем ресурса |
|---|---|
| DOI: | 10.1088/1742-6596/671/1/012031 |