风机塔筒流固耦合分析与受力监测研究

为研究大型风力机塔筒在随机风荷载下的受力和变形特性,用AR法模拟脉动风,基于ABAQUS协同仿真平台对风力机进行流固耦合分析,得到了塔筒的内力和变形,并与常规静力计算结果和实测结果做了相关对比。分析表明:塔筒最大应力出现在底、中段塔筒的连接部位,门洞因洞轴线与主风向垂直并设有门框,其周围未出现明显应力集中;忽略塔身风荷载会对塔筒最大应力控制点的位置造成偏差,考虑脉动风的流固耦合分析所得结果与实测结果接近,可较真实地反映塔筒内力和变形随时间的变化特性。

FLUID-SOLID INTERACTION ANALYSIS AND STRESS MONITORING RESEARCH OF WIND TURBINE TOWER RESEARCH OF WIND TURBINE TOWER

In order to study the stress and deformation characteristics of a large-scale wind turbine tower under stochastic wind loads, the time-history curve of fluctuating wind was simulated by an AR model. Based on an ABAQUS co-simulation platform, fluid-solid interaction analysis was carried out on wind turbine. Thus, the internal force and deformation of a wind turbine tower were obtained, and contrast analysis was made among calculated and monitored results. Research shows that the maximum stress is concentrated on the connected section of the bottom and middle tower, while no obvious stress concentration is found because of the perpendicularity between doorway axis and the prevailing wind direction, and the door frame being installed. It will cause the deviation of the maximum stress controlling points by ignoring the wind load on the tower. The results calculated by FSI method considering fluctuating agree well with the measured results. Therefore, it can accurately reflect internal forces and displacement variation characteristics with time.