High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator
The vibrations generated by a three-phase power transformer reduce the comfort of residents and the service life of surrounding equipment. To resolve this tough issue, a quasi-zero-stiffness (QZS) isolator for the transformer is proposed. This paper is devoted to developing a QZS isolator in a simpl...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/5596064 |
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| _version_ | 1832546891649253376 |
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| author | Hao Cao Yaopeng Chang Jiaxi Zhou Xuhui Zhao Ling Lu Fei Chen Xiaowen Wu |
| author_facet | Hao Cao Yaopeng Chang Jiaxi Zhou Xuhui Zhao Ling Lu Fei Chen Xiaowen Wu |
| author_sort | Hao Cao |
| collection | DOAJ |
| description | The vibrations generated by a three-phase power transformer reduce the comfort of residents and the service life of surrounding equipment. To resolve this tough issue, a quasi-zero-stiffness (QZS) isolator for the transformer is proposed. This paper is devoted to developing a QZS isolator in a simple way for engineering practices. The vertical springs are used to support the heavy weight of the transformer, while the oblique springs are employed to fulfill negative stiffness to neutralize the positive stiffness of the vertical spring. Hence, a combination of the vertical and oblique spring can yield high static but low dynamic stiffness, and the vibration isolation efficiency can be improved substantially. The dynamic analysis for the QZS vibration isolation system is conducted by the harmonic balance method, and the vibration isolation performance is estimated. Finally, the prototype of the QZS isolator is manufactured, and then the vibration isolation performance is tested comparing with the linear isolator under real power loading conditions. The experimental results show that the QZS isolator prominently outperforms the existing linear isolator. This is the first time to devise a QZS isolator for three-phase power transformers with heavy payloads in engineering practices. |
| format | Article |
| id | doaj-art-95bec5a17ede4cd1aee88c2625d0e64f |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-95bec5a17ede4cd1aee88c2625d0e64f2025-02-03T06:46:44ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/55960645596064High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness IsolatorHao Cao0Yaopeng Chang1Jiaxi Zhou2Xuhui Zhao3Ling Lu4Fei Chen5Xiaowen Wu6State Grid Hunan Electric Power Company Limited Research Institute, State Grid Laboratory of Electric Equipment Noise and Vibration Research, Changsha 410007, ChinaCollege of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, ChinaCollege of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, ChinaCollege of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, ChinaState Grid Hunan Electric Power Company Limited Research Institute, State Grid Laboratory of Electric Equipment Noise and Vibration Research, Changsha 410007, ChinaState Grid Hunan Electric Power Company Limited Research Institute, State Grid Laboratory of Electric Equipment Noise and Vibration Research, Changsha 410007, ChinaState Grid Hunan Electric Power Company Limited Research Institute, State Grid Laboratory of Electric Equipment Noise and Vibration Research, Changsha 410007, ChinaThe vibrations generated by a three-phase power transformer reduce the comfort of residents and the service life of surrounding equipment. To resolve this tough issue, a quasi-zero-stiffness (QZS) isolator for the transformer is proposed. This paper is devoted to developing a QZS isolator in a simple way for engineering practices. The vertical springs are used to support the heavy weight of the transformer, while the oblique springs are employed to fulfill negative stiffness to neutralize the positive stiffness of the vertical spring. Hence, a combination of the vertical and oblique spring can yield high static but low dynamic stiffness, and the vibration isolation efficiency can be improved substantially. The dynamic analysis for the QZS vibration isolation system is conducted by the harmonic balance method, and the vibration isolation performance is estimated. Finally, the prototype of the QZS isolator is manufactured, and then the vibration isolation performance is tested comparing with the linear isolator under real power loading conditions. The experimental results show that the QZS isolator prominently outperforms the existing linear isolator. This is the first time to devise a QZS isolator for three-phase power transformers with heavy payloads in engineering practices.http://dx.doi.org/10.1155/2021/5596064 |
| spellingShingle | Hao Cao Yaopeng Chang Jiaxi Zhou Xuhui Zhao Ling Lu Fei Chen Xiaowen Wu High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator Shock and Vibration |
| title | High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator |
| title_full | High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator |
| title_fullStr | High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator |
| title_full_unstemmed | High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator |
| title_short | High-Efficiency Vibration Isolation for a Three-Phase Power Transformer by a Quasi-Zero-Stiffness Isolator |
| title_sort | high efficiency vibration isolation for a three phase power transformer by a quasi zero stiffness isolator |
| url | http://dx.doi.org/10.1155/2021/5596064 |
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