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Volume 33 Issue 09
Sep.  2007
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Journal of Beijing University of Aeronautics and Astronautics  > 2007  >  33(09): 1013-1016.
Chen Meng, Ma Yanhong, Liu Shuguo, et al. Rotordynamic analysis of whole aero-engine models based on finite element method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(09): 1013-1016. (in Chinese)
Citation: Chen Meng, Ma Yanhong, Liu Shuguo, et al. Rotordynamic analysis of whole aero-engine models based on finite element method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(09): 1013-1016. (in Chinese)
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Rotordynamic analysis of whole aero-engine models based on finite element method

  • School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 09 Oct 2006
  • Publish Date: 30 Sep 2007
    Abstract
  • In modern times, the mechanical and aero forced frequency on aero-engines become more and more intricate, so dynamical interaction of different structures should be taken into account in aero-engine vibration analysis. For above reasons, a rotordynamic analysis of a whole engine model based on three-dimensional solid element was performed using the program which could take gyroscopic moment into account on NASTRAN. An unbalance response calculation of the casing was performed to predict the transfer function (dynamic stiffness) at the bearing support, as well as their effects on rotordynamics. In the analysis of models based on different elements, the effect of corner stiffness between shafts and disks was compared, as well as the coupled vibration of disks and shafts, it is proved that various vibration modes could be accurately calculated using the whole engine model based on solid element.A phenomenon of the coupled rotor bending and casing vibration was captured, as well as the effect rule, it was showed the third rotor critical speed of the coupled rotor bending and casing vibration mode was a frequency range. The method to predict critical speeds and mode shapes of the rotor considering dynamic interaction between the rotor and casing was investigated.

     

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  • [1] 赵险峰.带非线性阻尼的转子动力学有限元研究 .北京:北京航空航天大学能源与动力工程学院,2000 Zhao Xiangfeng. A study on the dynamics of nonlinear damp rotor by finite element method . Beijing:School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, 2000(in Chinese) [2] 陈萌.基于有限元素法的转子-支承-机匣系统动力分析研究 . 北京:北京航空航天大学能源与动力工程学院,2006 Chen Meng. A study on the dynamic analysis of rotor-bearing-casing system based on finite element method . Beijing:School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, 2006(in Chinese) [3] 顾家柳.转子动力学[M]. 北京:国防工业出版社,1985 Gu Jialiu. Rotor dynamics[M]. Beijing:National Denfence Industry Press, 1985(in Chinese) [4] 高金海. 航空发动机整机建模技术及计算仿真研究 . 北京:北京航空航天大学能源与动力工程学院,2005 Gao Jinhai. A study on the model technology of engine casing and imitative calculation . Beijing:School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, 2005(in Chinese) [5] Jeffrey J, Vannini G, Camatti M, et al. Rotordynamic analysis of a large industrial turbo-compressor including finite element substructure modeling ASME Turbo Expo 2006:Power for Land, Sea and Air.Barcelona:GT2006, 2006 [6] 史亚杰,洪杰,朱梓根. 大长径比柔性转子系统设计方法研究 发动机结构强度与振动专业委员会第十二届学术会论文集. 成都:, 2004:54-58 Shi Yajie, Hong Jie, Zhu Zigen. Investigation of dynamic characteristics of flexible rotor system Aviation Academy Impetus Branch Committee 12th Academic Conference Paper of Engine Structure Intensity and Vibration Council of China Society of Aeronautics and Astronautics. Chengdu:, 2004:54-58(in Chinese)
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