[1]曹银萍,黄宇曦,于凯强,等. 基于ANSYS Workbench完井管柱流固耦合振动固有频率分析[J].油气井测试,2018,27(01):1-7.[doi:10.19680/j.cnki.1004-4388.2018.01.001]
　CAO Yinping,HUANG Yuxi,YU Kaiqiang,et al. Natural frequency analysis for fluidsolid coupling vibration of completion string based on ANSYS workbench[J].Well Testing,2018,27(01):1-7.[doi:10.19680/j.cnki.1004-4388.2018.01.001]
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 基于ANSYS Workbench完井管柱流固耦合振动固有频率分析()
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《油气井测试》[ISSN:1006-6977/CN:61-1281/TN]

卷:
27
期数:
2018年01期
页码:
1-7
栏目:
出版日期:
2018-02-25

文章信息/Info

Title:
 Natural frequency analysis for fluidsolid coupling vibration of completion string based on ANSYS workbench
文章编号:
1004-4388(2018)01-0001-07
作者:
曹银萍1;  黄宇曦1;  于凯强2;  窦益华1
1. 西安石油大学机械工程学院  陕西西安  710065
2. 中航富士达科技股份有限公司  陕西西安  710000
Author(s):
 CAO Yinping1;  HUANG Yuxi1;  YU Kaiqiang2;  DOU Yihua1
1. College of Mechanical Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China
2. Avic Forstar Company, Xi’an, Shaanxi 710000, China
关键词:
 ; 试油; 完井管柱; 固有频率; 流固耦合; 模态分析; ANSYS Workbench; 有限元分析
Keywords:
 ; well testing;  completion string;  natural frequency;  fluidsolid coupling effect;  modal analysis;  ANSYS Workbench;  finite element analysis
分类号:
TE925
DOI:
10.19680/j.cnki.1004-4388.2018.01.001
文献标志码:
A
摘要:
试油完井工况下，处于高温高压环境中的管柱易受到压力、轴向力、温度以及流固耦合作用的影响而引发振动。以完井管柱为研究对象，在ANSYS Workbench中建立完井管柱的有限元模型，用六面体八节点单元进行了网格划分，并对流体和固体设置流固耦合交界面，分析了内压、轴向力以及流固耦合作用对完井管柱固有频率的影响。研究结果表明，完井管柱的固有频率随着管柱内压的增加而减小；完井管柱固有频率随着轴向力的增加而增加；流固耦合作用会降低管柱的固有频率。当管柱内流体为天然气时，管柱的固有频率减小14%；当管柱内流体为水时，管柱的固有频率减少18%，液体与管柱流固耦合作用对管柱固有频率的影响大于气体。该分析为试油完井管柱安全性评估和结构优化提供了理论支持。
Abstract:
Under the high temperature and highpressure conditions, the production test and completion string may vibrate due to pressure, axial force, temperature and fluidsolid coupling effect. In this paper, a finite element model of the completion string has been established in ANSYS Workbench and meshed with the hexahedron eightnode element. Meanwhile, the fluidsolid coupling interface is set up in order to analyze the influence of internal pressure, axial force and fluidsolid coupling effect on natural frequency of the completion string. The results show that the natural frequency of the completion string decreases with the increase of the internal pressure, increases with the increase of axial force, and reduces due to the fluidsolid coupling effect. When the fluid in the string is natural gas, the natural frequency can decrease by 14%. When the fluid in the string is water, the natural frequency can decrease by 18%. The fluidsolid coupling effect between liquid and string has a greater effect on the natural frequency than the gas. This study provides theoretical basis for safety evaluation and structure optimization of well testing string.

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更新日期/Last Update: 2018-04-25