用节线法计算悬索桥缆形

Obtaining the Cable's Shape Parameters of Suspension Bridge by Nodal Line Method

采用节线法对悬索桥进行初始平衡状态分析,编制MATLAB计算程序,计算了实例的缆索线形及其无应力长度等主要参数;同时利用MIDAS对程序的计算结果进行了分析对比。最后以MATLAB计算结果为边界条件建立ANSYS有限元模型,进行结果分析,验证了节线法在进行悬索桥初始平衡状态分析时不很精确的结论。

In this paper,the initial equilibrium state of suspension bridge was analyzed by nodal line method.First,primary parameters such as form of cable line,length of unstressed section,etc.was calculated by using theMATLABprogram,and the results were compared to those byMATLABprogram.Finally,the results ofMATLABas the boundary condition,the finite element model was built by usingANSYS software.The results show that nodal line method is not precise enough in analyzing the initial equilibrium state of suspension bridge.