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Sediment vibration characteristics based on accelerometer measurements

The study of the vibration phenomenon of pebbles under turbulence is still a gap despite recent technological advancements in measurement capabilities. In this study, the vibration process of a fully exposed, isolated smart pebble on a rough bed was measured using a miniature inertial accelerometer...

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Autores principales: Wang, Pingyi, Yuan, Jun, Wang, Meili, Wang, Mi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9867763/
https://www.ncbi.nlm.nih.gov/pubmed/36681769
http://dx.doi.org/10.1038/s41598-023-28209-8
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author Wang, Pingyi
Yuan, Jun
Wang, Meili
Wang, Mi
author_facet Wang, Pingyi
Yuan, Jun
Wang, Meili
Wang, Mi
author_sort Wang, Pingyi
collection PubMed
description The study of the vibration phenomenon of pebbles under turbulence is still a gap despite recent technological advancements in measurement capabilities. In this study, the vibration process of a fully exposed, isolated smart pebble on a rough bed was measured using a miniature inertial accelerometer and combined with simultaneous local measurements of the near-bed velocities. The paper conducts a series of experimental studies with different flow conditions. The test data match well with the manually observed phenomena, indicating the authenticity of the sediment vibration data collected by the measurement system. The test results show that the pebble motion (before entrainment) subjected to turbulence is a nonlinear vibration process, and its vibration types include in-situ vibration and ex-situ strong vibration. The probability distribution for the amplitude of vibration acceleration is well parameterized by the normal distribution. The vibration intensity tends to increase before approaching the threshold, but it weakens when approaching the point. The sediment vibration frequency is within 20–25 Hz, similar to the flow pulsation frequency and belongs to low-frequency vibration. The data indicate that the near-bed flow velocity is most directly related to the particle vibration events.
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spelling pubmed-98677632023-01-23 Sediment vibration characteristics based on accelerometer measurements Wang, Pingyi Yuan, Jun Wang, Meili Wang, Mi Sci Rep Article The study of the vibration phenomenon of pebbles under turbulence is still a gap despite recent technological advancements in measurement capabilities. In this study, the vibration process of a fully exposed, isolated smart pebble on a rough bed was measured using a miniature inertial accelerometer and combined with simultaneous local measurements of the near-bed velocities. The paper conducts a series of experimental studies with different flow conditions. The test data match well with the manually observed phenomena, indicating the authenticity of the sediment vibration data collected by the measurement system. The test results show that the pebble motion (before entrainment) subjected to turbulence is a nonlinear vibration process, and its vibration types include in-situ vibration and ex-situ strong vibration. The probability distribution for the amplitude of vibration acceleration is well parameterized by the normal distribution. The vibration intensity tends to increase before approaching the threshold, but it weakens when approaching the point. The sediment vibration frequency is within 20–25 Hz, similar to the flow pulsation frequency and belongs to low-frequency vibration. The data indicate that the near-bed flow velocity is most directly related to the particle vibration events. Nature Publishing Group UK 2023-01-21 /pmc/articles/PMC9867763/ /pubmed/36681769 http://dx.doi.org/10.1038/s41598-023-28209-8 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Wang, Pingyi
Yuan, Jun
Wang, Meili
Wang, Mi
Sediment vibration characteristics based on accelerometer measurements
title Sediment vibration characteristics based on accelerometer measurements
title_full Sediment vibration characteristics based on accelerometer measurements
title_fullStr Sediment vibration characteristics based on accelerometer measurements
title_full_unstemmed Sediment vibration characteristics based on accelerometer measurements
title_short Sediment vibration characteristics based on accelerometer measurements
title_sort sediment vibration characteristics based on accelerometer measurements
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9867763/
https://www.ncbi.nlm.nih.gov/pubmed/36681769
http://dx.doi.org/10.1038/s41598-023-28209-8
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