大型潜水轴流泵转子部件湿模态数值模拟

为了得到大型潜水轴流泵在水介质中的模态分布，并分析水介质对结构模态的影响，该文采用UDF二次开发，运用ANSYS WORKBENCH和APDL命令流耦合的方法，对特大型潜水轴流泵的轴系转动部件进行了考虑预应力情况下的湿模态数值模拟，分别计算了定常和非定常状态下预应力和不存在预应力情况下的固有频率和振型，以及转子部件在真空（干模态）和清水介质（湿模态）中的固有频率和振型，研究了预应力和清水介质对结构模态的影响。分析了不同情况下造成模态分布差异的原因，为下一步进行更加复杂的动力学分析、疲劳分析以及结构优化奠定基础。...

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Bibliographic Details
Published in农业工程学报 Vol. 29; no. 24; pp. 72 - 78
Main Author 施卫东 郭艳磊 张德胜 孟凡有 蒋文军
Format Journal Article
LanguageChinese
Published 江苏大学流体机械工程技术研究中心、国家水泵及系统工程技术研究中心,镇江,212013%江苏亚太泵阀有限公司,泰州,225400 2013
Subjects
固有频率
振型
模态分析
泵
流固耦合
转子
振型
rotors
natural frequency
泵
转子
固有频率
pumps
mode of vibration
模态分析
流固耦合
modal analysis
fluid-solid coupling
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2013.24.010

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Summary:为了得到大型潜水轴流泵在水介质中的模态分布，并分析水介质对结构模态的影响，该文采用UDF二次开发，运用ANSYS WORKBENCH和APDL命令流耦合的方法，对特大型潜水轴流泵的轴系转动部件进行了考虑预应力情况下的湿模态数值模拟，分别计算了定常和非定常状态下预应力和不存在预应力情况下的固有频率和振型，以及转子部件在真空（干模态）和清水介质（湿模态）中的固有频率和振型，研究了预应力和清水介质对结构模态的影响。分析了不同情况下造成模态分布差异的原因，为下一步进行更加复杂的动力学分析、疲劳分析以及结构优化奠定基础。
Bibliography:pumps, rotors, modal analysis, natural frequency, fluid-solid coupling, mode of vibration
11-2047/S
Based on method of fluid-solid coupling, a model of the large submersible axial-flow pump （1600QZ55-1100） rotating component which contains an impeller,axis and hub was studied by means of a second development of UDF and coupling WORKBENCH with APDL command. It obtained the natural frequencies and mode of vibration of a rotating component in a vacuum with pre-stress was considered, and pre-stress was not considered. Furthermore, it also achieved the natural frequencies and mode of vibration of a rotating component in water with pre-stress considered. All the above were studied in a steady condition. However, the axial-flow pump works in an unsteady condition in fact. This paper studied the effect of an unsteady condition on the structure mode too. The result showed that the natural frequencies of considering pre-stress in a steady condition are larger than those of not considering pre-stress, especially that the
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2013.24.010