排灌机械工程学报2019，Vol.37Issue(3)：211-215,5.DOI:10.3969/j.issn.1674-8530.17.0112
基于热流固耦合的LNG低温潜液泵转子部件模态分析
Modal analysis of rotor parts of LNG low temperature submersible pump based on thermo-fluid-structure coupling
摘要
Abstract
The LNG low temperature submersible pump was modeled by UG and the thermo-fluidstructure coupling of the rotor components were calculated by ANSYS Workbench. The thermodynamic coupling force of the flow field to the solid structure was obtained. The modes of the rotor components were analyzed with or without prestressing force. Based on the results, the first ten order modes were extracted and the modes in the two cases were compared. The results show that except for the seventh order and eighth order vibrations, the vibration of the other stages is expressed on the impeller. After the prestressing force is added, the various modes of the rotor component do not change.But the natural frequency of each order has a slight change, the prestressing force has little effect on the natural frequencies of the rotor components. The natural frequencies of the ninth and tenth order are close to the three times the blade frequency of the pump, so there is the danger of resonance.It is necessary to optimize the design of the rotor components so that the front three times the blade frequency can be far away from the natural frequencies of the various stages, thereby avoiding the resonance of the pump during operation. Under the influence of prestressing force, the amplitude of the rotor parts also has a small change.关键词
LNG低温潜液泵/热流固耦合/振幅/模态分析/固有频率Key words
LNG low temperature submersible pumps/thermo-fluid-structure coupling/amplitude/modal analysis/natural frequency分类
农业科技引用本文复制引用
张智伟,施卫东,张德胜,陈宗贺,黄俊..基于热流固耦合的LNG低温潜液泵转子部件模态分析[J].排灌机械工程学报,2019,37(3):211-215,5.基金项目
江苏省重点研发计划项目(BE2015001-3) （BE2015001-3）
江苏省"六大人才高峰"项目(HYGC-008) （HYGC-008）
江苏省第五期"333工程"培养对象项目 （）
