Finite Element Analysis of Rigidity Characteristics of Elastic Ring for Gas Turbine Rotor System
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摘要: 涡轮机转子系统的弹性支撑刚度是调整和控制临界转速的关键。该文采用有限元法建立了弹性环刚度计算模型, 分析了弹性环自身各个结构参数、涡动角以及装配间隙等参数对弹性环刚度的影响。通过试验测试, 验证了应用有限元法计算弹性环支撑刚度的可行性和精确性。试验结果表明, 弹性环刚度设计需主要考虑的参数为凸台数目、壁厚、宽度以及装配间隙, 为弹性环的动力学设计提供依据。Abstract: Elastic support stiffness is vital to adjustment and control of critical speed of gas turbine rotor system. In this study, a rigidity computation model of elastic ring was established with finite element method to analyze the effects of elastic ring′s structural parameters, whirling angle and fit clearance on its rigidity. Tests and measurements verified the feasibility and accuracy of the finite element method for calculating the support rigidity of the elastic ring. The results show that the main parameters in rigidity design of the elastic ring should include the number of bosses, the wall thickness and width, and the fit clearance.
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Key words:
- gas turbine /
- rotor system /
- elastic ring /
- rigidity /
- finite element method
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