异形钢塔合龙精确配切量计算方法及应用

提出了考虑已成合龙口架设偏差的空间扭曲型合龙段精确配切量计算方法。以合龙口特征点至合龙段端口棱线距离构造目标函数,以合龙段满足架设偏差为约束条件,基于内点罚函数法驱动优化模型,精确计算合龙段各棱线配切量。通过连续72 h温度场与变形的关联分析,确定合龙时机;基于环境温度与温度场关联分析及天气预报,考虑温度影响,对配切量进行修正。最后,通过合龙口及合龙段多特征点坐标采集,计算合龙段配切量,实现了钢塔零附加应力精确自然合龙。

High Precision Cutting Length Calculation Method and Application of Special-shaped Steel Pylon with Closure Segment

An accurate cutting length calculation method for space-warped closure segment which considers the erection deviation of closure port was proposed. To obtain the optimization model drived by the internal penalty function method and calculate the ridge line cutting length of closure segment accurately, an objective function with distance between the characteristic points of closure port and the ridge lines of closure segment was constructed, and the constraints of the erection deviation of the closure segment were satisfied. The closure time was determined by the correlation analysis of the temperature field and deformation with 72 h measured data. The temperature influence correction method of the cutting length was proposed based on weather forecast and the correlation analysis on temperature field and ambient temperature. The steel pylon closure with zero additional stress and high precise came into fact due to closure segment cutting calculation method based on the coordinates of multi-feature points.