大跨越输电线路导地线力学计算软件研究

Research on Software in Mechanical Calculation for Large Span Conducting and Ground Leads

大跨越输电线路杆塔高、档距大,导地线各点高度不同,各点的风压也不同,当气象条件发生变化时,温度、荷载的改变将引起各档应力、档距改变,若采用常规的平均高度法和代表档距法计算大跨越导地线力学特性,将导致较大误差.本文采用积分法计算大跨越耐张段导地线各档风荷载,进而精确计算各气象条件下的应力和档距改变量,以Visual Basic 6.0作为软件开发工具,Ac-cess2003作为软件的数据源,开发了一套完整的大跨越输电线路导地线力学计算软件.软件不仅可以完成复杂的导地线力学计算,而且大大提高了计算效率和准确性.

With the high pole and tower, and the large span, every point of conducting and ground leads of large span transmission line has different heights. The air pressure of each point is also different. When the weather conditions change ,the temperature and load variation will cause the gear stress and span change. If we use the conventional average height method and representative span method for mechanical properties cal- culation of large span conducting and ground leads, it will inevitably lead to larger error. Taking the Visual Basic 6.0 as the software development tool, Access 2003 as the software data source, and calculating transmis- sion line＇s wind load of large span strain segment in integration method, thus calculating the stress in every weather condition and the amount of span change, this paper develops a complete set of mechanical properties calculation software of conducting and ground leads of large-span transmission line. The software can not only completes the complex mechanical properties calculation, but also greatly improves the computational efficien- cy and accuracy.