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应用有限元软件ANSYS,对500 kV变电构架中刚、柔性法兰在拉弯荷载作用的应力分布和变形特点进行非线性数值分析,将螺栓最大拉力的有限元结果与《架空送电线路杆塔结构设计技术规定(》DL/T5154—2002)结果进行对比,发现大偏心受拉时规范采用的旋转轴位置还有待进一步研究,建议柔性法兰螺栓受力修正系数m值取为0.75;实际工程中在设计刚、柔性法兰时,至少应留25%的安全裕度。从有限元计算的螺栓最大拉力、法兰的应力云图和局部变形图同样看出,有限元分析结果准确可靠,和试验研究结果及规范比较吻合。
The finite element software ANSYS is used to conduct nonlinear numerical analysis on the stress distribution and deformation characteristics of the rigid and flexible flanges under tension and bending loads in 500 kV substation. The finite element results of the maximum tension of the bolts are compared with “ Structure design technical specifications (”DL / T5154-2002) results are compared and found that the eccentric eccentricity of large rotating shaft position to be further studied, the proposed flexibility flange bolt force correction factor m value of 0.75; the actual project In the design of just, flexible flange, should leave at least 25% of the safety margin. From the finite element calculation of the maximum bolt tension, flange stress and local deformation map also shows that the finite element analysis is accurate and reliable, and the experimental results and specifications are in good agreement.