摘要
为解决穿堤管道工程在长期运行中由振动导致的管道破坏、堤防渗漏等现象,开展振动在管道及土体内的传递路径分析并进行减振试验。首先,以广东省某穿堤管道工程为原型,采用量纲分析法确定模型试验相似比,得到穿堤管道各个结构设计尺寸、管道与土体的材质,并铺设模型堤防;其次,通过传递熵与信息传递率理论,研究振动沿穿堤管道及堤防土体的传递路径;最后,分别采用粗砂、聚氯乙烯(polyvinyl chloride,简称PVC)塑料和橡胶材料分析各材料对穿堤管道结构的减振效果。结果表明:振动在管道中心及堤防出口产生逆水流方向振动;在堤防水平方向,振动由两侧向中间传递;在堤防垂直方向,振动由管身向堤防上下传递;管道振动主频为9.89、12.29、17.53和21.18 Hz,3种减振材料对振动峰值、均方差、主频能量均有削弱作用;主频为9.89 Hz与17.53 Hz的振动经粗砂与橡胶材料减振后均未出现,说明粗砂与橡胶能够有效改变振动主频,避免与管道发生共振。
To solve the problems of pipeline damage and dike leakage caused by vibration during long-term operation of pipeline crossing dike,the vibration transmission path in the pipeline and soil is analyzed,and vibration reduction tests are conducted.First,a pipeline crossing dike project in Guangdong Province is taken as the prototype,the similarity ratio of the model test is determined using the dimensional analysis method.The design dimensions of each structure of the pipeline crossing dike,the materials of the pipeline and soil are also obtained,and the model dike is laid.Second,the vibration transmission path along the pipeline passing through the dike and the dike soil is investigated by applying the theory of transfer entropy and information transfer rate.Finally,the vibration reduction effects of coarse sand,polyvingl chloride plastic,and rubber materials on the pipeline structure passing through the dike are analyzed.The results show that the vibration occurs in the reverse flow direction at the center of the pipeline and the outlet of the dike.In the horizontal direction of the dike,vibration is transmitted from both sides to the middle.In the vertical direction of the dike,vibration is transmitted from the pipe body upwards and downwards through the dike.The main frequencies of pipeline vibration are 9.89 Hz,12.29 Hz,17.53 Hz,and 21.18 Hz.The 3 reduction materials have a weakening effect on the vibration peak,mean square deviation,and main frequency energy.The main frequencies of 9.89 Hz and 17.53 Hz do not appear after vibration reduction with coarse sand and rubber materials,indicating that coarse sand and rubber materials can effectively change the main frequency of vibration and avoid resonance with the pipeline.
作者
张建伟
杨灿
黄锦林
叶合欣
邢帅
ZHANG Jianwei;YANG Can;HUANG Jinlin;YE Hexin;XING Shuai(School of Water Conservancy,North China University of Water Conservancy and Electric Power Zhengzhou,450046,China;Powerchina Beijing Engineering Co.,Ltd.Beijing,100024,China;Department of Guangdong Research Institute of Water Resources and Hydropower Guangzhou,510635,China;Department of Guangdong Technology Center of Water Resources and Hydropower Guangzhou,510635,China)
出处
《振动.测试与诊断》
北大核心
2025年第6期1208-1214,1278,1279,共9页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(52279133)
广东省水利科技创新资助项目(2024-07,2025-17)
广东省水利水电技术中心委托资助项目(JSZXWT202525)。
关键词
振动
模型试验
穿堤管道
传递路径
传递熵
减振
vibration
model test
pipeline crossing dike
transmission path
transfer entropy
vibration reduction
