路旁地下光缆受冲击压路机振动影响的数值分析  

Numerical analysis of impact roller vibration effect on buried optical fiber cable

作　　者：苏卫国[1] 蔡锡荣[1] 李晓华[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《振动与冲击》2011年第6期20-25,共6页Journal of Vibration and Shock

基　　金：广东省交通厅科技计划项目(2006-18)

摘　　要：冲击压路机施工振动对路旁地下光缆有何影响,尚没有明确的实验及理论定论,制约了冲击压实技术在埋设地下光缆路段的应用。为了解决这个问题,基于实际工程参数,根据有关假设,模拟冲击压实施工多周期加载模式,建立三维有限元模型,利用ANSYS软件对路面附近不同埋深的光缆在冲击压路机施工时受到的振动影响进行数值分析,结果表明冲击压实施工对埋深60 cm的光缆影响不大,当光缆的埋设位置由原来位置向路面板方向靠近时,冲击压实施工对光缆产生的影响逐渐变大,在基层底部向上0.1 m处和基层底部向上0.14 m处Z方向压应力和X方向拉应力分别达到允许值,可能会对光缆造成破坏。The effect of impact roller vibration restricts the application of impact compaction technology to the structure of highway section with beneath buried optical fiber cable.In order to solve this issue,based on practical project parameters,according to the relative hypothesis and simulating the multi-cycles loading mode in impact compaction construction,a 3-D finite element model was developed.The vibration effects on different optical fiber cables caused by impact compaction construction were analyzed with the ANSYS software,and the results show that impact compaction construction has little effect on the optical fiber cable in 60cm buried depth.The impact in construction on the cable will become larger when the location of the cable gradually nears towards the pavement.The compressive stress in Z direction and the tensile stress in X direction reach their allowed values when the cable is buried up to 0.1 meter and 0.14 meter deep from the bottom of subgrade respectively,and further the cable will be destroyed.

关 键 词：道路工程 冲击压实技术 振动 光缆 多周期加载 三维 数值分析 有限元方法 

分 类 号：U416.01[交通运输工程—道路与铁道工程]