Article(id=1223204293910577258, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223204286050452333, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221075, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1652976000000, receivedDateStr=2022-05-20, revisedDate=1658419200000, revisedDateStr=2022-07-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1769564229704, onlineDateStr=2026-01-28, pubDate=1684944000000, pubDateStr=2023-05-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769564229704, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769564229704, creator=13701087609, updateTime=1769564229704, updator=13701087609, issue=Issue{id=1223204286050452333, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='5', pageStart='1', pageEnd='220', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769564227831, creator=13701087609, updateTime=1769567742010, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223219026013323264, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223204286050452333, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223219026013323265, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223204286050452333, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=174, endPage=177, ext={EN=ArticleExt(id=1223204294699106486, articleId=1223204293910577258, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Time-frequency Characteristics Analysis of Pulsating Pressure of Water Flow Through Gate Based on Hilbert-Huang Transform, columnId=1222925284869922957, journalTitle=Water Resources and Power, columnName=ELECTROMECHANICS AND CONTROL ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

The plane gate controls water storage and discharge by opening and closing, and is easily damaged by the pulsating pressure of the water flow during operation. In order to study the interaction process between the opening and closing motion of the gate and the flow through the gate, this paper firstly conducted a three-dimensional numerical simulation of the flow through the gate during the opening and closing process of the gate under different bottom edge forms. And then the Hilbert-Huang transform was used to analyze the flow through the gate, and the time-frequency-amplitude information of the signal. The information analysis and comparison found that the bottom edge of the combined gate with a forward tilt of 45° and a backward tilt of 30° is gently affected by the pulsating pressure at the bottom of the gate, and the change difference of the energy amplitude at the measuring point was the smallest, and the water flow state was relatively stable. This study can provide a reference for the analysis of the pulsating pressure of the water flow through the plane gate.

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平面闸门通过启闭控制蓄水和泄水,在运作时容易受水流脉动压力作用而发生破坏。为研究闸门启闭运动与过闸水流的相互作用过程,首先对不同底缘形式下的闸门启闭过程中过闸水流进行三维数值模拟,再采用希尔伯特—黄变换对过闸水流脉动压力信号进行时频特性分析,得到信号的时间—频率—幅值信息,对比分析发现在前倾45°、后倾30°的组合式闸门底缘,在闸门底部受脉动压力作用较平缓,测点能量幅值的变化差值最小,水流流态较为稳定。该研究可为平面闸门过闸水流脉动压力分析提供参考。

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沈春颖(1982-),女,博士、正高级实验师,研究方向为工程水力学,E-mail:
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张蕊(2000-),女,硕士研究生,研究方向为水力学,E-mail:

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张蕊(2000-),女,硕士研究生,研究方向为水力学,E-mail:

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张蕊(2000-),女,硕士研究生,研究方向为水力学,E-mail:

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基于希尔伯特—黄变换的过闸水流脉动压力时频特性分析
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张蕊 1 , 沈春颖 1 , 马江霞 1, 2
水电能源科学 | 机电与控制工程 2023,41(5): 174-177
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水电能源科学 | 机电与控制工程 2023, 41(5): 174-177
基于希尔伯特—黄变换的过闸水流脉动压力时频特性分析
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张蕊1 , 沈春颖1 , 马江霞1, 2
作者信息
  • 1.昆明理工大学电力工程学院,云南 昆明 650500
  • 2.华能澜沧江水电股份有限公司,云南 昆明 650214
  • 张蕊(2000-),女,硕士研究生,研究方向为水力学,E-mail:

通讯作者:

沈春颖(1982-),女,博士、正高级实验师,研究方向为工程水力学,E-mail:
Time-frequency Characteristics Analysis of Pulsating Pressure of Water Flow Through Gate Based on Hilbert-Huang Transform
Rui ZHANG1 , Chun-ying SHEN1 , Jiang-xia MA1, 2
Affiliations
  • 1.School of Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
  • 2.Huaneng Lancang River Hydropower Inc., Kunming 650214, China
出版时间: 2023-05-25 doi: 10.20040/j.cnki.1000-7709.2023.20221075
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平面闸门通过启闭控制蓄水和泄水,在运作时容易受水流脉动压力作用而发生破坏。为研究闸门启闭运动与过闸水流的相互作用过程,首先对不同底缘形式下的闸门启闭过程中过闸水流进行三维数值模拟,再采用希尔伯特—黄变换对过闸水流脉动压力信号进行时频特性分析,得到信号的时间—频率—幅值信息,对比分析发现在前倾45°、后倾30°的组合式闸门底缘,在闸门底部受脉动压力作用较平缓,测点能量幅值的变化差值最小,水流流态较为稳定。该研究可为平面闸门过闸水流脉动压力分析提供参考。

平面闸门  /  闸门底缘  /  脉动压力  /  希尔伯特—黄变换  /  时频特性分析

The plane gate controls water storage and discharge by opening and closing, and is easily damaged by the pulsating pressure of the water flow during operation. In order to study the interaction process between the opening and closing motion of the gate and the flow through the gate, this paper firstly conducted a three-dimensional numerical simulation of the flow through the gate during the opening and closing process of the gate under different bottom edge forms. And then the Hilbert-Huang transform was used to analyze the flow through the gate, and the time-frequency-amplitude information of the signal. The information analysis and comparison found that the bottom edge of the combined gate with a forward tilt of 45° and a backward tilt of 30° is gently affected by the pulsating pressure at the bottom of the gate, and the change difference of the energy amplitude at the measuring point was the smallest, and the water flow state was relatively stable. This study can provide a reference for the analysis of the pulsating pressure of the water flow through the plane gate.

plane gate  /  gate bottom edge  /  pulsating pressure  /  Hilbert-Huang transform  /  time-frequency characteristic analysis
张蕊, 沈春颖, 马江霞. 基于希尔伯特—黄变换的过闸水流脉动压力时频特性分析. 水电能源科学, 2023 , 41 (5) : 174 -177 . DOI: 10.20040/j.cnki.1000-7709.2023.20221075
Rui ZHANG, Chun-ying SHEN, Jiang-xia MA. Time-frequency Characteristics Analysis of Pulsating Pressure of Water Flow Through Gate Based on Hilbert-Huang Transform[J]. Water Resources and Power, 2023 , 41 (5) : 174 -177 . DOI: 10.20040/j.cnki.1000-7709.2023.20221075
  • 国家自然科学基金项目(52069009)
  • 昆明理工大学引进人才科研启动基金项目(KKSY201904008)
2023年第41卷第5期
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doi: 10.20040/j.cnki.1000-7709.2023.20221075
  • 接收时间:2022-05-20
  • 首发时间:2026-01-28
  • 出版时间:2023-05-25
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出版历史
  • 收稿日期:2022-05-20
  • 修回日期:2022-07-22
基金
国家自然科学基金项目(52069009)
昆明理工大学引进人才科研启动基金项目(KKSY201904008)
作者信息
    1.昆明理工大学电力工程学院,云南 昆明 650500
    2.华能澜沧江水电股份有限公司,云南 昆明 650214

通讯作者:

沈春颖(1982-),女,博士、正高级实验师,研究方向为工程水力学,E-mail:
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2种不同金属材料的力学参数

Family
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Number of
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种数
Number of
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Percentage of
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Genus
种数
Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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