平底水垫塘泄洪振动的相关性特征研究  

Research on correlation characteristics of flood discharge vibration of flat-bottom plunge pool

作　　者：彭文祥[1] 马斌[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《水资源与水工程学报》2013年第2期174-177,共4页Journal of Water Resources and Water Engineering

基　　金：天津市应用基础及前沿技术研究计划(青年基金项目)(12JCQNJC04600)

摘　　要：水垫塘底板在泄洪产生的水动力荷载作用下产生振动,其振动的整体性可以在一定程度上反映底板结构的完整性。研究底板在泄洪条件下振动的相关性特征可以为识别底板结构的完整性提供重要的参考依据。文章以某底流消能水垫塘原型观测数据为依据,分析了底板泄洪振动的相关性特征。研究表明,底板结构完好时,其泄洪振动的相关性较好,相邻两点振动的相关系数高于0.8;同种工况下,中轴线附近底板振动的纵向空间积分尺度最大,同桩号横向空间积分尺度次之,右岸纵向空间积分尺度最小。The vibrating integrity of slabs of plunge pool under the hydrodynamic loads during flood discharge can reflect the integrity of the bottom structure to certain extent. Study on the correlation characteristics of the bottom during flood discharge can provide important reference for identification of the integrity of plate structure. Based on the prototype observation data of slabs with energy dissipation by hydraulic jump, the paper analyzed the correlation characteristics of vibration during flood discharge. The resuits show that the correlation of flood discharge vibration of slabs is better when the structure of slabs is best. The correlation coefficient between adjacent points is more than 0. 8. Under the same spillway condition, the longitudinal spatial scale in axis bottom is the largest and the transverse spatial scale takes the second place ,while the longitudinal spatial scale on the right bank is the least.

关 键 词：水利水电工程 平底水垫塘 原型观测 相关系数 空间积分尺度 

分 类 号：TV131.33[水利工程—水力学及河流动力学]