Heliostat as a typical wind-sensitive structure, its dynamic characteristics and wind induced response must be considered in the design stage. The Large Eddy Simulation(LES) and the Detached Eddy Simulation(DES) were applied. Integrated with a new inflow generation, Discretizing and Synthesizing Random Flow Generation(DSRFG), to simulate the turbulence boundary conditions of the flow field. And acquire the flow field distribution and wind load time-history data of the heliostat under 0° wind direction angle and 0°、30°、60° elevation angle. The finite element model of the heliostat was established, and the wind induced responses of heliostat under different elevation angles were performed. Comparison with wind tunnel test results, the along-wind equivalent wind load of the heliostat, which was computed by LES and DES, respectively, were in satisfactory agreement with wind tunnel test. But the results of LES comparatively approach the wind tunnel test. With the increase of the elevation angle, the resonance peak of the bottom of the heliostat gradually decreases, and the resonance peak of the top of the heliostat gradually increases. The most unfavorable conditios of the bottom of heliostat is 0° elevation angle, and the wind vibration coefficient is 3.1. The most unfavorable condition of the middle and top of heliostat is 60° elevation angle, and wind vibration coefficient are 2.0 and 3.4，respectively. The turbulence and vortex in the flow field can be well simulated by LES and DES. And the wake flow of heliostat becomes long and narrow, as the elevation angle increases. Combined with wind tunnel test, this paper provides a reference for wind numerical simulation and wind resistance design of heliostat and similar structures.
Key words
heliostat /
LES,;DES /
wind load /
Wind induced response
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