Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes
In this study, three-dimensional finite element models of high-mast light poles without and with spiral helical strakes were built using ANSYS software to investigate their vibration characteristics in a wind environment. Based on a two-way, fluid–structure interaction simulation method, the dynamic...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/4/907 |
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| author | Meng Zhang Tianxiang Li Yang Wang Yizhuo Chen Guifeng Zhao |
| author_facet | Meng Zhang Tianxiang Li Yang Wang Yizhuo Chen Guifeng Zhao |
| author_sort | Meng Zhang |
| collection | DOAJ |
| description | In this study, three-dimensional finite element models of high-mast light poles without and with spiral helical strakes were built using ANSYS software to investigate their vibration characteristics in a wind environment. Based on a two-way, fluid–structure interaction simulation method, the dynamic responses of the high-mast light poles under different windspeeds were analyzed. The results indicate that the high-mast light pole structure without spiral helical strakes may suffer from evident vortex-induced vibration, which is dominated by the third vibration mode in the windspeed range of 5~8 m/s, whereas the light pole with spiral helical strakes had no obvious vortex-induced vibration. The external helical strakes can amplify the along-wind response of the light pole to a certain extent, while significantly decreasing its crosswind vortex-induced response. The vibration suppression effect is better when the value of pitch <i>P</i> is small. Practically, if <i>P</i> = 7.5 <i>D</i> (<i>D</i> is the diameter of the dominant vibration mode), the vibration suppression effect is best. On the other hand, if the value of pitch <i>P</i> remains constant, the vibration suppression effect increases with the height <i>H</i> of the outer helical strakes. However, excessively high outer helical strakes may also increase the along-wind response of the structure. In general, when spiral helical strakes are used in design, the recommended values of <i>P</i> and <i>H</i> are <i>P</i> = 7.5 <i>D</i> and <i>H</i> = 0.20 <i>D</i>. |
| first_indexed | 2024-03-11T05:11:10Z |
| format | Article |
| id | doaj.art-844719b129e74ba59ee0e159e29debe6 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T05:11:10Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-844719b129e74ba59ee0e159e29debe62023-11-17T18:34:49ZengMDPI AGBuildings2075-53092023-03-0113490710.3390/buildings13040907Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical StrakesMeng Zhang0Tianxiang Li1Yang Wang2Yizhuo Chen3Guifeng Zhao4School of Water Resources and Civil Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Resources and Civil Engineering, Zhengzhou University, Zhengzhou 450001, ChinaInstitute of Civil Engineering, Huzhou Vocational & Technical College, Huzhou 313000, ChinaSchool of Water Resources and Civil Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Resources and Civil Engineering, Zhengzhou University, Zhengzhou 450001, ChinaIn this study, three-dimensional finite element models of high-mast light poles without and with spiral helical strakes were built using ANSYS software to investigate their vibration characteristics in a wind environment. Based on a two-way, fluid–structure interaction simulation method, the dynamic responses of the high-mast light poles under different windspeeds were analyzed. The results indicate that the high-mast light pole structure without spiral helical strakes may suffer from evident vortex-induced vibration, which is dominated by the third vibration mode in the windspeed range of 5~8 m/s, whereas the light pole with spiral helical strakes had no obvious vortex-induced vibration. The external helical strakes can amplify the along-wind response of the light pole to a certain extent, while significantly decreasing its crosswind vortex-induced response. The vibration suppression effect is better when the value of pitch <i>P</i> is small. Practically, if <i>P</i> = 7.5 <i>D</i> (<i>D</i> is the diameter of the dominant vibration mode), the vibration suppression effect is best. On the other hand, if the value of pitch <i>P</i> remains constant, the vibration suppression effect increases with the height <i>H</i> of the outer helical strakes. However, excessively high outer helical strakes may also increase the along-wind response of the structure. In general, when spiral helical strakes are used in design, the recommended values of <i>P</i> and <i>H</i> are <i>P</i> = 7.5 <i>D</i> and <i>H</i> = 0.20 <i>D</i>.https://www.mdpi.com/2075-5309/13/4/907two-way fluid–structure interactionhigh-mast light poleshelical strakewind-induced responsevibration suppression |
| spellingShingle | Meng Zhang Tianxiang Li Yang Wang Yizhuo Chen Guifeng Zhao Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes Buildings two-way fluid–structure interaction high-mast light poles helical strake wind-induced response vibration suppression |
| title | Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes |
| title_full | Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes |
| title_fullStr | Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes |
| title_full_unstemmed | Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes |
| title_short | Wind-Induced Vibration and Vibration Suppression of High-Mast Light Poles with Spiral Helical Strakes |
| title_sort | wind induced vibration and vibration suppression of high mast light poles with spiral helical strakes |
| topic | two-way fluid–structure interaction high-mast light poles helical strake wind-induced response vibration suppression |
| url | https://www.mdpi.com/2075-5309/13/4/907 |
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