【摘要】 对输电塔线体系进行有限元计算,需要先进行导地线的找形,因此找形问题是输电塔线结构分析计算的首要问题。在预先假设特定气象条件下的导线张拉应力和荷载,通过采用导地线的抛物线方程对体系的导地线进行理论上的近似找形,然后在重力场的作用下进行数次非线性静力分析,其形状可以很快地收敛为精确的导地线形状。通过介绍输电线路导地线的有限单元法找形计算,以期对类似输电线路的数值分析提供参考。更多还原

【Abstract】 The problem of cable’s form-finding is the first task for simulation and analysis of the transmission tower-lines structures.In this paper,with ANSYS program of the finite element method,it is established a new spatial analytical-numerical model of 220kV combo steel tube tower for large crossing transmission lines crossing Tiezhuang canal of Pearl River.First,the theoretical approximate form is obtained by adopting cables parabolic cure subjected to special pretension and load under assumptive meteorologic condition.Secondly,by repetitious nonlinear static analysis,the accurate forms of conductor and lightening conductor are acquired under gravitational field.The finite element technical for form-finding of cables have some reference values for numerical analysis of similar transmission tower-lines system.更多还原