基于参数化建模的风电机组塔筒法兰联接螺栓应力计算分析

Calculation and analysis to the tower flange bolts stress of wind turbine based on the parameterized modeling

以某MW级风电机组塔筒法兰联接螺栓为研究对象,对载荷特点进行分析,基于ANSYS Workbench软件,采用参数化建模的方法建立计算模型。对不同预紧力、不同外载荷、不同法兰厚度下的螺栓应力变化规律进行计算分析。研究结果表明:对于承受复杂载荷的风电机组塔筒法兰联接,需考虑外载与联接螺栓应力之间的非线性关系;增加预紧力可减小螺栓应力的波动范围,降低疲劳载荷,适当增加法兰厚度可有效降低螺栓应力,提高螺栓联接强度。

Based on the ANSYS Workbench software and load characteristics analysis, the tower flange bolts assembly of a MW-class wind turbine was modeled using parameterized method. The change laws of bolts stress were calculated and analyzed at different pre-forces, external loads and flange thickness. The research shows that the nonlinearity between the loads and flange bolts stress must be considered for the tower design. Increasing the pre-forces of the bolts can decrease the fatigue loads by reducing the stress ranges. Proper adding the flange thickness can reduce bolts stress effectively.