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针对光伏阵列所处的复杂风环境,考虑流体压力荷载对支撑系统变形的跟随效应,推导流固耦合界面传递方程,采用流固耦合算法分析脉动风作用下光伏支撑系统的风振时程。研究表明:1)基于流固耦合算法的计算结果可准确反映支撑系统的风振特性;2)对于多排阵列,脉动风作用下的首排阵列支撑系统的位移响应在频域上的分布较为均匀,满足位移限定的条件下不会出现涡激共振;3)后排阵列支撑系统响应主频范围比较集中,位移限定条件容易满足,支撑设计首要考虑基频避开涡脱落主频范围,以防止出现涡激共振;4)光伏阵列各排动力放大效应差异较大;5)沿顺风向各排支撑系统响应折减效果显著,支撑选型时需要考虑该折减效应以进行经济指标控制。
Aiming at the complicated wind environment where the PV array is located, the follow-up effect of the fluid pressure load on the deformation of the support system is taken into account. The fluid-solid coupling interface transfer equation is deduced and the wind-induced vibration duration of the PV support system is analyzed by the fluid-solid coupling algorithm. The results show that: 1) the results based on the fluid-solid coupling algorithm can accurately reflect the wind-vibration characteristics of the supporting system; 2) For the first row of array supporting system under multi-row array, Vortex resonance will not occur under the condition that the displacement is uniform and the displacement is limited; 3) The main frequency range of the rear row array supporting system is relatively concentrated, and the displacement qualification conditions are easy to meet. The support design mainly considers the fundamental frequency to avoid the main frequency range of vortex shedding To prevent the occurrence of vortex-induced resonance; 4) the magnification effect of each row of photovoltaic array is quite different; 5) the effect of reducing the response of each supporting system along the downwind direction is significant; this reduction effect needs to be considered in the support selection for economic index control.