摘要
以赤石大桥为基础,通过有限元法,对多塔斜拉桥可能的共振模式进行了研究。首先,基于赤石大桥的相关资料,建立了多塔斜拉桥的平面有限元模型;其次,通过斜拉索频率与弦理论计算结果的对比,对有限元模型进行了修正;最后,通过对多塔斜拉桥自由振动模态和频率的深入研究,提出斜拉桥局部混合模态的新概念和揭示了多塔斜拉桥可能的复杂动力学行为,具有一定的科学意义和工程参考价值。
On the basis of chishi bridge, the resonance mode of cable-stayed bridge have been studied by the finite element method. First of all, a in-plane finite element model of cable-stayed bridge is establised based on the relevant data of chishi Bridge. Secondly, by comparing the frequencies of ca- bles obtained by the string theory and finite element method, the finite element model was modified. Fi- nally, based on the research of the free vibration mode and its frequency of the multi-tower cable-stayed bridge, a new concept concerned the local mixed mode has been proposed and some complex dynamics behavior of multi pylon cable-stayed bridges has been revealed, which is of some scientific significance and engineering value.
出处
《公路工程》
北大核心
2017年第2期56-62,共7页
Highway Engineering
基金
国家自然科学基金项目(11572117
11502076)
湖南省交通厅项目(201428)
关键词
斜拉桥
共振
整体模态
局部模态
cable-stayed bridge
resonance
global mode
local mode
