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随着风力发电机组朝大型化发展,单管式塔架造价高与运输困难的问题凸显,组合式塔架是一种较为新型的塔架,不仅降低造价且方便运输。本文介绍了某2MW轮毂高度120m的新型角钢四边形组合式塔架的过渡段设计,基于ANSYS14.0对过渡段的静力性能和疲劳性能进行分析。分析结果表明,静力工况下厚度在28~38mm范围内变化时的塑性总应变均小于1.0%;过渡段厚度由45°方向的疲劳荷载控制,最大疲劳应力幅出现在过渡段插接焊缝处;在0°方向荷载作用下过渡段受压侧纵向法兰连接顶部螺栓受到较大附加弯曲效应和撬力,需加大此处螺栓直径。
With the large-scale development of wind turbine generators, the issue of high cost of single-tube towers and difficulties in transportation highlights that the modular tower is a relatively new type of tower, which not only reduces the cost and facilitates the transportation. In this paper, the design of the transition section of a new angle-steel quadrangular composite tower with a 2MW hub height of 120m is introduced. The static and fatigue properties of the transition section are analyzed based on ANSYS14.0. The results show that the total plastic strain of the transitional section is less than 1.0% when the thickness changes from 28mm to 38mm in the static condition. The thickness of the transitional section is controlled by the fatigue load in the direction of 45 °, and the maximum fatigue stress amplitude appears in the transitional section At the 0 ° direction, under the action of load, the compression flange on the compression side of the transitional section is subjected to a large additional bending effect and prying force. The bolt diameter needs to be enlarged.