反向平衡法兰试验研究

Experimental research of Reverse Balance Flange

摘要:

反向平衡法兰是一种新型的大型塔筒连接形式，目前已经在风电行业中得到应用。本文以调兵山风力发电场第65、66号750kW风机新型结构塔筒上反向平衡法兰为试验对象，对反向平衡法兰及其连接塔筒的两个缩尺模型均进行静力加载试验。试验结果表明，反向平衡法兰节点具有良好的抗弯刚度，节点的极限承载力都能达到设计荷载水平的1.5倍以上，且法兰节点范围内钢管未观察到局部失稳或断裂现象。试验结果证明，反向平衡法兰完全满足设计荷载下强度与刚度的要求，具有较高的安全储备。

Abstract:

Reverse Balance Flange, which has found wide applications in the industry of wind power, is a new type connection form of huge tower tube. The Reverse Balance Flange of main tower tubes used in the 750 kW wind turbines of No. 65 and 66 in Diaobing Mountain Wind Power Field are taken as test object. Scale tests of two Reverse Balance Flanges and these connected tower tube were performed under static load. The results show that Reverse Balance Flange has excellent bending stiffness; the ultimate carrying capacity of this connection is above 1.5 times as large as the design load. Neither local buckling nor fracture of the pipe in the joint was observed in the tests. It is proved that the reverse balance flanges meet the requirements on strength and rigidity under the designed load and have high emergency capacity.