|本期目录/Table of Contents|

[1]杨乾,杨庆华.竖井消能工折板压强及脉动特性分析*[J].中国安全生产科学技术,2021,17(6):12-18.[doi:10.11731/j.issn.1673-193x.2021.06.002]
 YANG Qian,YANG Qinghua.Analysis of baffle-drop pressure and fluctuation characteristics of shaft energy dissipator[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(6):12-18.[doi:10.11731/j.issn.1673-193x.2021.06.002]
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竖井消能工折板压强及脉动特性分析*
分享到:

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年6期
页码:
12-18
栏目:
学术论著
出版日期:
2021-06-30

文章信息/Info

Title:
Analysis of baffle-drop pressure and fluctuation characteristics of shaft energy dissipator
文章编号:
1673-193X(2021)-06-0012-07
作者:
杨乾杨庆华
(西南交通大学 土木工程学院,四川 成都 610031)
Author(s):
YANG Qian YANG Qinghua
(School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China)
关键词:
折板式竖井水力模型试验时均压强脉动压强概率密度功率谱密度傅立叶变换
Keywords:
baffle-drop shaft hydraulic model test time-average pressure fluctuating pressure probability density power spectral density fourier transform
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2021.06.002
文献标志码:
A
摘要:
为研究泄流过程中折板式竖井消能工水动力荷载作用,以某深隧排水工程竖井为研究对象,开展正态水力模型试验,研究恒定流与非恒定流条件下折板压强分布规律及脉动特性,分析折板间距和倾角对频谱特征影响。结果表明:上层折板承受时均压强为中层和下层折板1.5~3倍;恒定流条件下折板瞬时压强脉动幅值随入流量和折板间距增大而增大,随折板倾角增大而减小,功率谱密度优势频段为0~2.5 Hz;非恒定流条件下折板瞬时压强自上而下依次减小,功率谱密度优势频段介于0~4.0 Hz。研究结果可为竖井折板结构防振设计提供参考。
Abstract:
In order to study the hydrodynamic load effect of baffle-drop shaft energy dissipator during the discharge process,taking the shaft of a deep tunnel drainage engineering as the research object,the hydraulic model tests were conducted to investigate the distribution laws and fluctuation characteristics of baffle-drop pressure under the steady flow and unsteady flow conditions,and the influence of baffle-drop spacing and angle on the spectrum characteristics was analyzed.The results showed that the time-average pressure of the upper baffle-drop was 1.5~3 times that of the middle and lower baffle-drops.The fluctuation amplitude of instantaneous pressure under the steady flow condition increased with the increase of inflow rate and baffle-drop spacing,while decreased with the increase of baffle-drop angle,and the dominant frequency band of the power spectral density concentrated at 0~2.5 Hz.The instantaneous pressure of baffle-drop under the unsteady flow condition decreased from top to bottom,and the dominant frequency band of the power spectral density was 0~4.0 Hz.The research results can provide reference for the anti-vibration design of baffle-drop structure in the shaft.

参考文献/References:

[1]王浩,梅超,刘家宏.海绵城市系统构建模式[J].水利学报,2017,48(9):1009-1014,1022. WANG Hao,MEI Chao,LIU Jiahong.Systematic construction pattern of the sponge city [J].Journal of Hydraulic Engineering,2017,48(9):1009-1014,1022.
[2]杨乾,杨庆华,郑立宁,等.深隧排水折板型竖井泄流消能的试验研究[J].西南交通大学学报,2020,55(6):1247-1256. YANG Qian,YANG Qinghua,ZHENG Lining,et al.Experimental study on discharge and energy dissipation of baffle-drop shaft in deep tunnel drainage system [J].Journal of Southwest Jiaotong University,2020,55(6):1247-1256.
[3]WU H C,HUANG G R,MENG Q Q,et al.Deep tunnel for regulating combined sewer overflow pollution and flood disaster:a case study in Guangzhou city,China [J].Water,2016,8(8):329.
[4]刘家宏,夏霖,王浩,等.城市深隧排水系统典型案例分析[J].科学通报,2017,62(27):3269-3276. LIU Jiahong,XIA Lin,WANG Hao,et al.Typical case analysis of deep tunnel drainage system in urban area [J].Chinese Science Bulletin,2017,62(27):3269-3276.
[5]LIAO L,AN R D,LI J,et al.Hydraulic characteristics of stepped spillway dropshafts for urban deep tunnel drainage systems:a case study of Chengdu city [J].Water Science & Technology,2019,80(8):1538-1548.
[6]SHEN Y J,WU J H,MA F.Hydraulic characteristics of stepped spillway dropshafts [J].Science China-Technological Sciences,2019,62(5):868-874.
[7]MARGEVICIUS A,SCHREIBER A,SWITALSKI R.A baffling solution to a complex problem involving sewage drop structures [C]// Proceedings of the 33rd IAHR Congress:Water Engineering for a Sustainable Environment.Vancouver:Proceedings of the Water Environment Federation,2009:1-9.
[8]马永林,王海阳,傅宗甫,等.内湿外干型折板式竖井泄流特性数值模拟[J].水电能源科学,2020,38(1):108-111. MA Yonglin,WANG Haiyang,FU Zongfu,et al.Numerical simulation of discharge characteristics of inside wet outside dry baffle-drop shaft [J].Water Resources and Power,2020,38(1):108-111.
[9]李璐,梁舒豪,杨墨,等.用于深隧工程的折板式竖井湿室部分数值模拟研究[J].中国给水排水,2019,35(13):128-133. LI Lu,LIANG Shuhao,YANG Mo,et al.Numerical simulation of wet chamber part of a baffle-drop shaft in deep tunnel engineering [J].China Water & Wastewater,2019,35(13):128-133.
[10]杨庆华,尧远,杨乾,等.折板型竖井结构设计参数优化研究[J].长江科学院院报,2020(9):21-27 YANG Qinghua,YAO Yuan,YANG Qian,et al.Optimization study on structure design parameters of baffle-drop shaft [J].Journal of Yangtze River Scientific Research Institute,2020(9):21-27.
[11]王斌,邓家泉,何贞俊,等.折板竖井结构优化试验研究:第二十七届全国水动力学研讨会文集[C].南京:海洋出版社,2015.
[12]MARGEVICIUS A,SCHREIBER A,SWITALSKI R.A baffling solution to a complex problem involving sewage drop structures [C]// Proceedings of the 33rd IAHR Congress:Water Engineering for a Sustainable Environment.Vancouver,B.C.,Canada:Proceedings of the Water Environment Federation,2009:1-9.
[13]ODGAARD A J,LYONS T C,CRAIG A J.Baffle-drop structure design relationships [J].Journal of Hydraulic Engineering,2013,139(9):995-1002.
[14]王斌,邓家泉,何贞俊,等.折板跌落式竖井设计约束条件研究[J].中国水利水电科学研究院学报,2015,13(5):363-367,374. WANG Bin,DENG Jiaquan,HE Zhenjun,et al.A study on design constraints for baffle-drop shaft structure [J].Journal of China Institute of Water Resources and Hydropower Research,2015,13(5):363-367,374.
[15]杨乾,杨庆华.折板型竖井湍流耗散及消能机理分析[J].东南大学学报(自然科学版),2020,50(3):471-481. YANG Qian,YANG Qinghua.Analysis on turbulent dissipation and energy dissipation mechanism of baffle-drop shaft [J].Journal of Southeast University(Natural Science Edition),2020,50(3):471-481.
[16]张帼奋,赵敏智.应用随机过程[M].北京:高等教育出版社,2017:76-94.
[17]孔凡,李杰.非平稳随机过程功率谱密度估计的小波方法[J].振动工程学报,2013,26(3):418-428. KONG Fan,LI Jie.Power spectrum estimation of non-stationary processes via wavelet [J].Journal of Vibration Engineering,2013,26(3):418-428.

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备注/Memo

备注/Memo:
收稿日期: 2020-09-30;网络首发日期: 2021-06-16
* 基金项目: 国家自然科学基金项目(51478403)
作者简介: 杨乾,博士研究生,主要研究方向为水工结构安全监测与评估。
通信作者: 杨庆华,博士,副教授,主要研究方向为水工结构安全监测与评估。
更新日期/Last Update: 2021-07-07