A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads
Tuned mass dampers (TMDs) are applied to ensure the safety and stability of offshore platforms; however, linear dampers are effective for a single resonance frequency, providing vibration suppression only within a narrow frequency band. Therefore, this paper proposed a magnetic TMD with two pairs of...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/1505061 |
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| _version_ | 1832549360872718336 |
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| author | Qiong Wu Wei Zhao Weiguo Zhu Rencheng Zheng Xilu Zhao |
| author_facet | Qiong Wu Wei Zhao Weiguo Zhu Rencheng Zheng Xilu Zhao |
| author_sort | Qiong Wu |
| collection | DOAJ |
| description | Tuned mass dampers (TMDs) are applied to ensure the safety and stability of offshore platforms; however, linear dampers are effective for a single resonance frequency, providing vibration suppression only within a narrow frequency band. Therefore, this paper proposed a magnetic TMD with two pairs of permanent magnets on both sides of the structures, which can generate a nonlinearly repulsive force, making the magnetic TMD reliable and robust in damping the oscillations of structures with wide frequency range under seismic excitations. A comprehensively numerical and experimental study was processed to investigate the dynamic performances of the proposed magnetic TMD, by application of a 1 : 200-scale prototype of the offshore platform. The results verified that the performance of the magnetic TMD can be significantly improved than that of the linear TMD, meanwhile maintaining high-speed response characteristics. The experimental results indicated that the displacement, acceleration, and frequency responses of the offshore platform can be significantly reduced; furthermore, the evaluation indices showed that the magnetic TMD system is credible in reducing the overall vibration levels and maximum peak values. |
| format | Article |
| id | doaj-art-2197a1e35af84f6a8faaf83bb162b563 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-2197a1e35af84f6a8faaf83bb162b5632025-02-03T06:11:25ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/15050611505061A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake LoadsQiong Wu0Wei Zhao1Weiguo Zhu2Rencheng Zheng3Xilu Zhao4Jiangsu Key Laboratory of Advanced Manufacturing Technology, Huaian 223003, ChinaGlobal Axis Inc., Mida Minato, Tokyo 1080073, JapanJiangsu Key Laboratory of Advanced Manufacturing Technology, Huaian 223003, ChinaJiangsu Key Laboratory of Advanced Manufacturing Technology, Huaian 223003, ChinaCollege of Mechanical Engineering, Saitama Institute of Technology, Saitama 3690293, JapanTuned mass dampers (TMDs) are applied to ensure the safety and stability of offshore platforms; however, linear dampers are effective for a single resonance frequency, providing vibration suppression only within a narrow frequency band. Therefore, this paper proposed a magnetic TMD with two pairs of permanent magnets on both sides of the structures, which can generate a nonlinearly repulsive force, making the magnetic TMD reliable and robust in damping the oscillations of structures with wide frequency range under seismic excitations. A comprehensively numerical and experimental study was processed to investigate the dynamic performances of the proposed magnetic TMD, by application of a 1 : 200-scale prototype of the offshore platform. The results verified that the performance of the magnetic TMD can be significantly improved than that of the linear TMD, meanwhile maintaining high-speed response characteristics. The experimental results indicated that the displacement, acceleration, and frequency responses of the offshore platform can be significantly reduced; furthermore, the evaluation indices showed that the magnetic TMD system is credible in reducing the overall vibration levels and maximum peak values.http://dx.doi.org/10.1155/2018/1505061 |
| spellingShingle | Qiong Wu Wei Zhao Weiguo Zhu Rencheng Zheng Xilu Zhao A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads Shock and Vibration |
| title | A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads |
| title_full | A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads |
| title_fullStr | A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads |
| title_full_unstemmed | A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads |
| title_short | A Tuned Mass Damper with Nonlinear Magnetic Force for Vibration Suppression with Wide Frequency Range of Offshore Platform under Earthquake Loads |
| title_sort | tuned mass damper with nonlinear magnetic force for vibration suppression with wide frequency range of offshore platform under earthquake loads |
| url | http://dx.doi.org/10.1155/2018/1505061 |
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