悬垂塔横担布置形式对铁塔受力性能的影响研究

Study on the influence of cross arm arrangement of suspension tower on the mechanical performance of tower

基于结构力学基本原理研究了悬垂塔不同横担布置形式的受力机制,结合数值模拟分析系统地研究了悬垂塔横担不同布置形式下的受力性能,并通过数值模拟验证了理论推导的可靠性和有效性;研究表明:横担正面轮廓形式采用三角收尖布置较梯形收口布置更优,能减轻横担20%以上的重量,刚度不会明显降低,降幅在4%以内;横担底面采用三角收尖布置时,其重量较梯形收口布置减少10%左右,刚度降幅在2%以内;横担下平面端部开口时,下平面采用根部倒K布置较交叉布置重量减少2%左右,且变形最小。因此工程中推荐悬垂塔横担采用三角收尖布置,优化挂点构造,研究结论对工程实践具有指导性意义。

Based on the basic principle of structural mechanics, the mechanical mechanism of different cross arm arrangement types of suspension tower is studied. Combined with numerical simulation analysis, the mechanical performance of different cross arm arrangement types of suspension tower is systematically studied, and the reliability and effectiveness of theoretical derivation are verified by numerical simulation. The results show that: the front profile of the cross arm is better than the trapezoidal one, which can reduce the weight of the cross arm by more than 20%, and the stiffness will not be significantly reduced, and the reduction is less than 4%. When the cross arm bottom is arranged with triangle end, its weight is reduced by about 10% compared with trapezoidal end, and its stiffness is reduced by less than 2%. When the end of the lower plane of the cross arm is open, the lower plane adopts the inverted K arrangement at the root, which reduces the weight by about 2% compared with the cross arrangement, and the deformation is the smallest;Therefore, it is recommended that the cross arms of the suspension tower should be arranged in a triangle way to optimize the structure of the hanging points. The research conclusion has guiding significance for the engineering practice.