Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System
A mathematical model to describe the seismic vibrator and ground coupling is proposed based on dynamic analyses of the vibrator baseplate structure and properties of soil. This mathematical model is solved using Newmark’s method. It produces reasonable results and the trend of amplitude envelope fol...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2017/2670218 |
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| _version_ | 1832550703812313088 |
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| author | Liu Jun Huang Zhi-Qiang Li Gang Li Shi-De Liu Xian Zhang Kai |
| author_facet | Liu Jun Huang Zhi-Qiang Li Gang Li Shi-De Liu Xian Zhang Kai |
| author_sort | Liu Jun |
| collection | DOAJ |
| description | A mathematical model to describe the seismic vibrator and ground coupling is proposed based on dynamic analyses of the vibrator baseplate structure and properties of soil. This mathematical model is solved using Newmark’s method. It produces reasonable results and the trend of amplitude envelope follows the experimental data. With this model, characterization of the vibrator-ground coupling is performed. Modal analysis study shows that the motions between the vibrator reaction mass and baseplate experience a combination of a first-order vibration mode and a second-order vibration mode. The corresponding frequencies of two vibration modes are located at 2.77 Hz and 488.7 Hz, respectively. As the frequency goes up, the motion behavior of the reaction mass and baseplate is dominated by the second-order vibration mode. It is realized that the second-order vibration mode is responsible for the phase difference between the input sweep signal and the output force signal. Furthermore, the impact of the coupling system parameters on the vibrator output force is also investigated. It is observed that the vibrator output force decreases as the sweep frequency increases. The weight ratio of the reaction mass and the baseplate has an impact on the vibrator output force. |
| format | Article |
| id | doaj-art-7e142db256234f32b113b8f8d12f66f5 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-7e142db256234f32b113b8f8d12f66f52025-02-03T06:06:02ZengWileyShock and Vibration1070-96221875-92032017-01-01201710.1155/2017/26702182670218Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling SystemLiu Jun0Huang Zhi-Qiang1Li Gang2Li Shi-De3Liu Xian4Zhang Kai5School of Mechatronic Engineering, Southwest Petroleum University, No. 8 Xindu Avenue, Xindu District, Chengdu, Sichuan 610500, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, No. 8 Xindu Avenue, Xindu District, Chengdu, Sichuan 610500, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, No. 8 Xindu Avenue, Xindu District, Chengdu, Sichuan 610500, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, No. 8 Xindu Avenue, Xindu District, Chengdu, Sichuan 610500, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, No. 8 Xindu Avenue, Xindu District, Chengdu, Sichuan 610500, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, No. 8 Xindu Avenue, Xindu District, Chengdu, Sichuan 610500, ChinaA mathematical model to describe the seismic vibrator and ground coupling is proposed based on dynamic analyses of the vibrator baseplate structure and properties of soil. This mathematical model is solved using Newmark’s method. It produces reasonable results and the trend of amplitude envelope follows the experimental data. With this model, characterization of the vibrator-ground coupling is performed. Modal analysis study shows that the motions between the vibrator reaction mass and baseplate experience a combination of a first-order vibration mode and a second-order vibration mode. The corresponding frequencies of two vibration modes are located at 2.77 Hz and 488.7 Hz, respectively. As the frequency goes up, the motion behavior of the reaction mass and baseplate is dominated by the second-order vibration mode. It is realized that the second-order vibration mode is responsible for the phase difference between the input sweep signal and the output force signal. Furthermore, the impact of the coupling system parameters on the vibrator output force is also investigated. It is observed that the vibrator output force decreases as the sweep frequency increases. The weight ratio of the reaction mass and the baseplate has an impact on the vibrator output force.http://dx.doi.org/10.1155/2017/2670218 |
| spellingShingle | Liu Jun Huang Zhi-Qiang Li Gang Li Shi-De Liu Xian Zhang Kai Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System Shock and Vibration |
| title | Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System |
| title_full | Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System |
| title_fullStr | Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System |
| title_full_unstemmed | Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System |
| title_short | Dynamic Characteristics Analysis of a Seismic Vibrator-Ground Coupling System |
| title_sort | dynamic characteristics analysis of a seismic vibrator ground coupling system |
| url | http://dx.doi.org/10.1155/2017/2670218 |
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