基于ANSYS的轮盘转子模态影响因素分析
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摘要
以某轮盘转子为研究对象,运用有限元软件ANSYS分别求得轮盘转子在无约束、盘心节点轴向与周向约束、不同转速下无约束和不同转速下盘心节点轴向与周向约束条件下的前6阶固有频率;对比了不同条件下轮盘转子的同阶模态振型。研究结果表明:轮盘节点自由度约束和转速的施加会减弱其各阶模态振动;有约束时各阶固有频率比自由模态各阶固有频率均低;各阶固有频率随着转速的升高而增大;仅对轮盘施加转速,无节点约束不影响转子模态。该项研究结果为转子的模态研究提供了理论支持与重要参考。
A wheel disc rotor was taken as the research object,the first six natural frequencies of the wheel disc rotor were respectively obtained with finite element software ANSYS under conditions of free,axial and circumferential constraints on the nodes of disk hub,free without speed,axial and circumferential constraints on the nodes of disk hub at different speeds.Modal shapes of the wheel disc rotor in different conditions were compared.The result shows that the modal vibration can be weakened under the conditions of nodes of the wheel disc rotor constrained and speed loaded.Each natural frequency increases with the increase of speed.The modal of the wheel disc rotor is not influenced by constraint on the nodes.The research result provides theoretical support and important reference for further study on modal of rotor.
A wheel disc rotor was taken as the research object,the first six natural frequencies of the wheel disc rotor were respectively obtained with finite element software ANSYS under conditions of free,axial and circumferential constraints on the nodes of disk hub,free without speed,axial and circumferential constraints on the nodes of disk hub at different speeds.Modal shapes of the wheel disc rotor in different conditions were compared.The result shows that the modal vibration can be weakened under the conditions of nodes of the wheel disc rotor constrained and speed loaded.Each natural frequency increases with the increase of speed.The modal of the wheel disc rotor is not influenced by constraint on the nodes.The research result provides theoretical support and important reference for further study on modal of rotor.
引文
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[2]贾延旭,张锁怀,蒋贤龙.基于ANSYS带预紧力拉杆转子模态分析[J].陕西科技大学学报,2014,32(05):148-151.
[3]李红伟,于文涛,刘淑琴.基于ANSYS的磁悬浮挠性转子模态分析与设计[J].中国机械工程,2014,11(06):1447-1452+1459.
[4]金勇,田宇忠,刘正林.水润滑橡胶尾轴承模态影响因素分析[J].润滑与密封,2011,36(09):10-13+23.
[5]李春旺,李海云,王澈,等.航空发动机涡轮叶片振动模态影响因素研究[J].空军工程大学学报,2014,15(01):5-9.