摘要
针对Irvine方程计算斜索面内固有振动的不足之处,在推导出整体割线坐标下斜拉索的动力平衡方程式的基础上求得了能简单计算斜索固有振动特性的修正Irvine方程。通过与用Galerkin法得到的精确解进行的对比表明,利用该修正方程能较准确地计算出斜拉索的面内固有振动频率和固有振型。
Based on the derived in-plane equations of motion for inclined cables in the global secant coordinate system, the modified Irvine equations are deduced, which compensates the limitation of Irvine equations in calculating the in-plane natural vibration of inclined cables. Compared with the exact results obtained by a Galerkin method, it is shown that the modified Irvine equations can be used to calculate the in-plane natural frequencies and modal shapes of inclined cables.
出处
《工程力学》
EI
CSCD
北大核心
2007年第4期18-23,共6页
Engineering Mechanics
基金
福州大学科技发展基金资助项目(2005XQ25)
关键词
结构工程
塔桅结构
斜索
固有振动
修正Irvine方程
structural engineering
tower and guyed mast structure
inclined cable
natural vibration
modified Irvine equations
