| 基于S变换的叠梁闸门水脉动压力特性研究 |
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| 引用本文： | 张社荣,黄虎,牛军宜,严磊.基于S变换的叠梁闸门水脉动压力特性研究[J].振动与冲击,2011,30(1):145. |
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| 作者姓名： | 张社荣 黄虎 牛军宜 严磊 |
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| 作者单位： | 天津大学建筑工程学院,天津:300072 |
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| 摘 要： | 以叠梁闸门脉动水压力为研究对象，采用S变换方法对叠梁闸门泄水过程的脉动压力信号进行时频分析处理，研究脉动压力信号能量在时频内的分布规律，确定脉动水压力在不同泄水方案下的优势频率。通过脉动压力优势频率和叠梁闸门的固有频率分析比较，判定在泄水过程中叠梁闸门发生共振现象的可能。结果表明，脉动水压力为低频分布，不同时刻的频率明显不同；不同取水方案时频率成分有明显的变化，随着取水高程的增加，脉动能量分布越来越广泛，频率成分也越来越丰富。在泄水过程中脉动水压力频率较小，远小于叠梁闸门固有频率，闸门运行过程中不会出现共振现象。
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| 关 键 词： | 叠梁闸门 脉动水压力 S变换 时频变换 共振 |
| 收稿时间： | 2009-8-5 |
| 修稿时间： | 2009-10-12 |
Pulsating water pressure features of a stop log gate based on S-transformation |
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| ZHANG She-rong,HUANG Hu,NIU Jun-yi,YAN Lei.Pulsating water pressure features of a stop log gate based on S-transformation[J].Journal of Vibration and Shock,2011,30(1):145. |
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| Authors: | ZHANG She-rong HUANG Hu NIU Jun-yi YAN Lei |
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| Affiliation: | ZHANG She-rong,HUANG Hu,NIU Jun-yi,YAN Lei (College of Civil Engineering,Tianjun University,Tianjin 300072,China) |
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| Abstract: | Taking pulsating water pressure of a stop log gate as an example,S-stransformation was adopted to analyze pulsating water pressure signals recorded in time frequency domain,the energy distribution laws in time-frequency domain and the dominant frequencies of a pulsating water pressure signal were investigated.The resonance in the working condition was judged through comparing the frequencies of the pulsating water pressure and the natural ones of the stop log gate.The results showed that the frequencies of ... |
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| Keywords: | stop log gate S-transformation pulsating water pressure time-frequency analysis resonance |
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