摘要
拉索的动力特性是拉索性能分析的基础。考虑弹性支承的影响建立了拉索动力分析的数学物理模型,研究了拉索的动力特性。研究表明:弹性支承刚度增大,索的整体刚度增大,索的自由振动频率增大;弹性支承刚度对奇数阶频率的影响远大于对偶数阶频率的影响;当反映索弹性支承刚度大小的无量纲参数k>25时,认为索两端固定,可不考虑索弹性支承刚度对拉索动力特性的影响。
The cable dynamic property is the base of performance analysis of cable in cable structures.The theoretical model considering flexibility supports was formed to study cable dynamic property.The study results showed as following：whole stiffness and free vibration frequencies increased with flexibility support stiffness increasing;the influence of flexibility support stiffness on the odd order frequencies was more than that on the even order frequencies;when the non-dimensional parameter k which indicated the relative value of flexibility supports stiffness on cable tension was more than 25,the flexibility supports were considered as fixed,and the influence of flexibility supports on cable dynamic property could be neglected.
出处
《结构工程师》
2011年第3期25-30,共6页
Structural Engineers
关键词
弹性支承
拉索
动力特性
频率
flexibility support
cable
dynamic property
frequency
