摘要
基于悬索结构的找形理论,通过预先设定导地线的初应变以表征初应力来建立输电塔线体系的有限元模型,在重力荷载作用下采用牛顿—拉普森迭代算法计算输电导地线找形。结果表明,该方法可较准确得到输电导地线的线形和内力,收敛快、计算精度、运算效率高,可为输电导地线及其他大跨缆索结构的找形和施工控制提供借鉴。
Based on the form-finding theory of the cable structure,the FEM model of transmission tower-line system is established by setting the initial strain of transmission line to characterize the initial stress.Newton-Raphson iteration method is adopted to calculate the form-finding of transmission line under the action of gravity load.The results show that the method can obtain the precise form and internal forces of transmission line;the method has features of quick convergence,high precision and computational efficiency.Therefore,the method can be used in form-finding and construction control of transmission line and other long-span cable structures.
出处
《水电能源科学》
北大核心
2012年第2期177-179,共3页
Water Resources and Power
关键词
牛顿—拉普森迭代法
导地线
找形
悬索结构
非线性
Newton-Raphson iteration method
transmission line
form-finding
cable structure
nonlinearity
