中小尺度嵌套下考虑停机位置的大型风力机体系风振响应分析

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Abstract Wind effect analysis methods for wind turbine systems used in wind engineering are usually based on a good state of climate models at home and abroad. Wind characteristics of typhoon boundary layer are different from those of good state of climate models, and typhoon can reveal obvious time-space variability and multi-scale vortex structure. Here, aiming at problems of theoretical system of civil engineering typhoon model being oversimplified, a meso-scale weather forecast (WRF) model was introduced to simulate the typhoon "Nuri" with high time-space resolution. Firstly, the central task is to compare typhoon’s wind direction and wind strength features before, during and after landing. Then, the typhoon center path simulation results were compared with the measured ones to verify the effectiveness of the meso-scale typhoon "Nuri" simulation. Taking a 5 MW horizontal axis wind turbine of a wind power plant in southeast coastal area of China as the object, the near ground 3-D wind field data were obtained based on the WRF simulation, and the small scale CFD large eddy simulation technology was used to do 3-D nonstationary numerical simulation for single rotating period of blades under conditions of different stop positions. Then, the finite element full transient method was used to do the dynamic time history analysis for the system’s wind vibration response under conditions of different stop positions, and extract influence law of stop positions on wind vibration response and wind vibration coefficient of the system. Finally, the most unfavorable stop positions of large wind turbine system under typhoon were summarized. The results showed that the WRF model can effectively be used to simulate typhoon’s near ground wind field, and the fitted typhoon profile index is 0.076; the tower frame internal force and wind vibration coefficient increase significantly under typhoon, especially, wind vibration response of the blade closest to the tower frame is the most unfavorable, the internal force amplitude increases up to 35%; when the large wind turbine system stops under action of typhoon, lower blade completely coinciding with tower frame is the most unfavorable (condition 1), while upper blade completely coinciding with tower frame has the maximum safety margin (condition 5).

Key words： wind turbine meso-micro scale large eddy simulation stop positions wind vibration responses wind vibration coefficient

Received: 11 July 2018 Published: 28 December 2019

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	XU Lu1
	3
	KE Shitang1
	2

Cite this article:

XU Lu1,3,KE Shitang1, et al. Wind vibration response analysis of large wind turbine system considering stopping position under meso-micro scale[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 91-101.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I1/91

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