接触网钢腕臂预配计算及用Visual Basic开发程序软件

Calculation of Catenary Wrist Arm and Development of Program Software with Visual Basic

常用的钢腕臂计算方法是建立数学模型,将腕臂装置分解成几个直角三角形,运用勾股定律和相似三角形定律,在直角三角形中计算出平腕臂、斜腕臂、定位管长度,以及定位环的安装位置。多数采用Excel表格进行计算,结果相对精确,但界面不直观,公式易被修改。文章推导了腕臂计算公式,运用Visual Basic编程软件,设置可视化的控件,定义多个未知变量,分双腕臂工作支和双腕臂非工作支计算两个程序模块,完成一个定型的程序界面。操作者只需输入每个模块需要的变量值,就可得到相应的结果,极大地简化了腕臂计算。

The commonly used steel wrist arm calculation method is to establish a mathematical model, the wrist arm device is broken down into several fight-angle triangles, by using the Pythagorean theorem and similar triangular law, in the right triangle, the flat wrist arm, oblique wrist arm, positioning tube length, and positioning ring installation location are worked out, majority of which are calculated with Excel forms, the results are relatively accurate, but the interface is not intuitive, the formula is easy to be modified. The wrist arm computational formula is derived in this paper, by using Visual Basic programming software, setting the visual control, defining multiple unknown variables, completing a stereotyped program interface respectively with two program modules. The operator simply inputs the variable value required for each module, the corresponding results can be get, and the wrist arm calculation is greatly simplified.