锚杆对溢流面板坝流激振动特性影响的研究  

Research on the Impact of Anchor Rod on Flow-Induced Vibration Characteristics of Overflow Concrete-Faced Rockfill Dam

作　　者：俞伟[1] 唐新军[1] 卢廷浩[2] YU Wei TANG Xinjun LU Tinghao(College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China Geotechnicla Engineering Research Institute, Hohai University, Nanjing 210098, China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]河海大学岩土工程研究所,江苏南京210098

出　　处：《人民黄河》2017年第9期90-94,98,共6页Yellow River

摘　　要：针对设锚杆的溢流面板坝泄槽流激振动性能复杂的特征,基于ABAQUS软件建立拟三维仿真模型,通过MATLAB自编程序实现脉动压强时域激励荷载的构造,采用时域分析法对不同泄流条件下设锚杆的系统模态和流激振动性能进行研究。结果表明:在水流流激振动作用下,锚杆对溢流面板坝泄槽动力稳定性的影响主要体现于泄槽中不同的流速条件,当泄槽最大流速大于40 m/s时,设锚杆使系统基频降低速率明显变缓,使泄槽底板接缝处发生较大变形和关键部位产生过大拉应力的流速明显增大,提高了其结构在水流流激振动作用下的动力稳定性。Aiming at the complex characteristics of the flow-induced vibrating performance of overflow concrete-faced rockfill dam with anchor rod, and based on the ABAQUS software, the quasi-3D simulation model was established. The construction of excitation pressure in time do- main excitation load was completed through the MATLAB self programming. The results show that the influence of bolt on the dynamic stabili- ty of the overflow slab dam is mainly reflected in the different flow rate conditions under the action of water flow excitation. When the maxi- mum flow rate of the tank is greater than 40 m/s, the anchor rate of the system is obviously slowed down, and the bottom of the septum at the septum of a large deformation and the key parts of the excessive tensile stress flow conditions increase significantly, which improves the dynamic stability of the structure under the action of water flow excitation.

关 键 词：溢流面板坝 设锚杆泄槽 脉动压强 系统频率 时域分析法 流激振动性能 

分 类 号：TV652.13[水利工程—水利水电工程] TV32