徐存东1,2,田俊姣1,2,王国霞1,2,王亚楠3,高懿伟1,2,张〓锐1,2.考虑流固耦合的泵站压力管道激振特性有限元分析[J].水电能源科学,2018,36(10):165-169
考虑流固耦合的泵站压力管道激振特性有限元分析
Vibration Characteristics Analysis of Pressure Pipeline in Pump Station Considering Fluid Solid Coupling by Finite Element Method
  
DOI:
中文关键词:  压力管道  流固耦合  激振特性  模态分析  有限元法
英文关键词:pressure pipe  fluid solid interaction  vibration characteristics  modal analysis  finite element simulation
基金项目:国家自然科学基金项目(51579102,31360204);河南省科技厅科技创新人才支持计划(174200510020)
作者单位
徐存东1,2,田俊姣1,2,王国霞1,2,王亚楠3,高懿伟1,2,张〓锐1,2 1. 华北水利水电大学 水利学院 河南 郑州 450046 2. 水资源高效利用与保障工程河南省协同创新中心 河南 郑州 450046 3. 河南灵捷水利勘测设计研究有限公司 河南 南阳 473003 
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中文摘要:
      为探究大型高扬程泵站压力管道运行时高频激振的诱因和振动特性,以甘肃省景电二期总干七泵#1压力管道为研究对象,采用附加水体质量法建立基于ANSYS有限元的简化流固耦合仿真模型,对压力管道的激振特征进行数值模拟,分析不同机组启闭工况下压力管道的振动模态及位移变形规律,揭示压力管道的主要振动变形特性。结果表明,在多种运行工况下,压力管道弯管段和大小管连接段振动比较明显,且高阶模态的振型振幅高于低阶模态,不易被激振的出水管随着阶次的增高也逐渐产生振动变形。经DASP测试系统现场振动监测表明,数值模拟结果与现场测试结果吻合良好。该结论可为高扬程泵站压力管道避振、减振优化设计提供技术支撑,也为同类泵站工程的更新改造设计和安全运行提供理论依据。
英文摘要:
      In order to explore the vibration characteristics and excitation causes of high frequency excitation in high lift pump station pressure pipeline, the simplified fluid solid coupling model based ANSYS finite element was established by the mass method of additional water body, and the excitation characteristics of pressure piping were numerically simulated, and analyzed the vibration modes and displacement laws of pressure pipeline under different start up and closing conditions during the water period, and revealed the main vibration and deformation characteristics of pressure piping. The results show that under the various operation conditions, the vibration deformation is obvious at the bend sections and pipe joints between large and small caliber; in addition, the vibration amplitude of high order vibration mode is larger than that of low order vibration mode, and with the increasing of order, vibration deformation can also occur in the outlet pipe which is not easily to be vibrated. The field vibration monitoring by the data acquisition and signal processing (DASP) test system shows that the results of the numerical simulation are in good agreement with the field test. The conclusion can provide technical support for optimal design of vibration and vibration reduction for pressure piping of high lift pumping station, and also provide theoretical basis for renewal design and safe operation of similar pumping stations.
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