| 王柯钦,王志成,姜孝谟.风机塔筒流致振动的高精度数值模拟方法研究[J].计算力学学报,2025,42(2):235~242 |
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| 风机塔筒流致振动的高精度数值模拟方法研究 |
| Research on high-precision numerical simulation method for flow induced vibration of wind turbine tower |
| 投稿时间：2023-09-16 修订日期：2023-12-19 |
| DOI：10.7511/jslx20230916002 |
| 中文关键词: 数值模拟 流致振动 谱元法 坐标变换 风机塔筒 |
| 英文关键词:numerical simulation flow induced vibration spectral element method coordinate transformation wind turbine tower |
| 基金项目:大连市创新领军人才(2022RG10),沈阳市揭榜挂帅项目(22-316-1-16),辽宁省揭榜挂帅项目(2023JH1/10400084)资助. |
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| 摘要点击次数: 11 |
| 全文下载次数: 10 |
| 中文摘要: |
| 采用高精度谱元法模拟了雷诺数为1000条件下,圆柱长径比为60,圆柱高度为计算域高度一半时流致振动的情况,采用坐标变换法处理振动过程中边界的移动问题。通过对圆柱发生和不发生流致振动的情况进行模拟,得到了其表面的受力情况,通过快速傅里叶变换得到功率谱密度与频率在高度方向上的关系。利用λ2涡识别方法对流场漩涡分布进行可视化处理。结果表明,不发生流致振动时受力在高度方向有一定对称性,且在y方向上呈周期性摇摆。二维涡量云图显示其漩涡尾迹呈标准的2S模式。发生流致振动时受力和位移整体集中在圆柱顶端,y方向上由于对称性而产生周期性的摇摆。在频率为0.127时发生锁定现象,产生较大的位移和力。流场漩涡分布变得更加离散和复杂。最后,通过整合计算结果,初步判定高精度谱元法在模拟风机塔筒流致振动的研究中有足够的精度和应用范围。 |
| 英文摘要: |
| In this paper,the high-precision spectral element method is used to simulate the flow induced vibration when the Reynolds number is 1000,the length diameter ratio of the cylinder is 60,and the height of the cylinder is half of the height of the calculation domain.The coordinate transformation method is used to deal with the problem of boundary movement in the process of vibration.By simulating the cylinder with or without flow induced vibration,the force on the cylinder surface is obtained under two conditions.The relationship between the power spectral density of the relevant parameters and the frequency in the height direction is obtained through fast Fourier transform.Afterwards, λ2 vortex recognition method is used to visualizes the distribution of vortices in the flow field.The results show that there is a certain degree of symmetry in the height direction when the cylinder is stationary,and it oscillates periodically in the y-direction direction.The two-dimensional vorticity cloud map shows that the vortex wake follows a standard "2S" shape pattern.In the case of a cylinder with flow induced vibration,the force and displacement are concentrated at the top of the cylinder as a whole,and periodic oscillation occurs in the y-direction due to a certain symmetry.A "lock in" phenomenon occurs at a frequency of 0.127,resulting in a significant displacement and force.The vortex distribution in its flow field becomes more scattered and complex.Finally,by integrating the calculation results,it is preliminarily concluded that the high-precision spectral element method has sufficient accuracy and application scope in simulating flow induced vibration of wind turbine towers. |
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