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双转子系统轴承座松动的动力学模型及故障特性

徐洪志 王南飞 蒋东翔

徐洪志, 王南飞, 蒋东翔. 双转子系统轴承座松动的动力学模型及故障特性[J]. 航空动力学报, 2016, 31(11): 2781-2794. doi: 10.13224/j.cnki.jasp.2016.11.029
引用本文: 徐洪志, 王南飞, 蒋东翔. 双转子系统轴承座松动的动力学模型及故障特性[J]. 航空动力学报, 2016, 31(11): 2781-2794. doi: 10.13224/j.cnki.jasp.2016.11.029
XU Hong-zhi, WANG Nan-fei, JIANG Dong-xiang. Bearing pedestal looseness dynamic model of dual rotor system and fault feature[J]. Journal of Aerospace Power, 2016, 31(11): 2781-2794. doi: 10.13224/j.cnki.jasp.2016.11.029
Citation: XU Hong-zhi, WANG Nan-fei, JIANG Dong-xiang. Bearing pedestal looseness dynamic model of dual rotor system and fault feature[J]. Journal of Aerospace Power, 2016, 31(11): 2781-2794. doi: 10.13224/j.cnki.jasp.2016.11.029

双转子系统轴承座松动的动力学模型及故障特性

doi: 10.13224/j.cnki.jasp.2016.11.029
基金项目: 

国家自然科学基金(11572167)

详细信息
    作者简介:

    徐洪志(1974-),男,河北枣强人,博士生,主要从事航空发动机转子动力学特性及故障诊断研究.

  • 中图分类号: V231.9;TH113.1

Bearing pedestal looseness dynamic model of dual rotor system and fault feature

  • 摘要: 针对双转子系统轴承座松动故障,基于实验台双转子结构,考虑松动轴承座的3自由度平面刚体运动,引入碰撞恢复系数,建立双转子系统轴承座松动的动力学模型.基于Timoshenko梁单元,利用有限元和刚体运动学方法,采用Newmark-β算法进行数值仿真,对轴承座松动故障时内、外转子运动的动力学特性进行了研究.同时,进行了两种不同转速组合下双转子系统的松动实验,结果基本相同.将仿真结果与实验结果对比分析,结果表明:轴承座松动故障时,松动转子振动位移波形有“削波”现象.内、外转子振动位移频谱不但含有两转子基频的差频与和频,还包含支承松动转子的2倍频,3倍频等分量;低频段谱线较多,含有分频成分等;转子位移频谱中还含有较少的组合频率成分等.轴承座单侧松动时,松动转子的轴心轨迹呈拉伸的类椭圆状.

     

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出版历程
  • 收稿日期:  2015-02-07
  • 刊出日期:  2016-11-28

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