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双转子系统内转子不同心频谱特性分析

张宏献 黄良沛 李学军 蒋玲莉 张帆宇

张宏献, 黄良沛, 李学军, 蒋玲莉, 张帆宇. 双转子系统内转子不同心频谱特性分析[J]. 机械科学与技术, 2021, 40(5): 701-709. doi: 10.13433/j.cnki.1003-8728.20200313
引用本文: 张宏献, 黄良沛, 李学军, 蒋玲莉, 张帆宇. 双转子系统内转子不同心频谱特性分析[J]. 机械科学与技术, 2021, 40(5): 701-709. doi: 10.13433/j.cnki.1003-8728.20200313
ZHANG Hongxian, HUANG Liangpei, LI Xuejun, JIANG Lingli, ZHANG Fanyu. Spectrum Analysis of a Dual Rotor Bearing System under Bearing Elevation in Inner Rotor[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(5): 701-709. doi: 10.13433/j.cnki.1003-8728.20200313
Citation: ZHANG Hongxian, HUANG Liangpei, LI Xuejun, JIANG Lingli, ZHANG Fanyu. Spectrum Analysis of a Dual Rotor Bearing System under Bearing Elevation in Inner Rotor[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(5): 701-709. doi: 10.13433/j.cnki.1003-8728.20200313

双转子系统内转子不同心频谱特性分析

doi: 10.13433/j.cnki.1003-8728.20200313
基金项目: 

国家自然科学基金项目 11672106

国家自然科学基金项目 11702091

湖南省自然科学基金项目 2018JJ3140

详细信息
    作者简介:

    张宏献(1982-), 高级工程师, 博士研究生, 研究方向为转子动力学, zhhongxian@163.com

    通讯作者:

    李学军, 教授, 博士生导师, hnkjdxlxj@163.com

  • 中图分类号: TV231.96;O347.6

Spectrum Analysis of a Dual Rotor Bearing System under Bearing Elevation in Inner Rotor

  • 摘要: 采用Timoshenko梁建立双转子系统的有限元模型,再根据三弯矩方程计算内转子不同心引起的附加轴承载荷,将轴承载荷引入双转子动力学方程,最终建立内转子不同心的双转子系统动力学模型。采用Newmark-β法求解系统动力学方程,分析不同心对转子系统振动频谱的影响。搭建了双转子试验台对仿真结果进行验证。研究表明:内转子轴承的不同心将导致轴承载荷随标高量线性变化,轴承载荷会使内转子产生静态变形。不同心状态下的不平衡响应除引起内、外转子倍频振动外,还激起了多阶正向进动和反向进动的固有频率,导致双转子系统振动频谱更加复杂。
  • 图  1  内转子三点支承的双转子结构示意图[34]

    图  2  某型航空发动机内转子支承结构[24]

    图  3  联轴器结构示意图[26]

    图  4  双转子系统结构简图

    图  5  轴单元坐标系示意图

    图  6  中介轴承受力分析

    图  7  内转子三点支承示意图

    图  8  外转子受力分析图

    图  9  内转子受力分析图

    图  10  支承载荷随轴承1标高的变化

    图  11  支承载荷随轴承2标高的变化

    图  12  支承载荷随轴承3标高的变化

    图  13  轴承1竖直方向频谱图

    图  14  轴承2竖直方向频谱图

    图  15  轴承3竖直方向频谱图

    图  16  轴承4竖直方向频谱图

    图  17  双转子试验台

    图  18  轴承1竖直方向不同心频谱图(实测)

    图  19  轴承2竖直方向不同心频谱图(实测)

    图  20  轴承3竖直方向不同心频谱图(实测)

    图  21  轴承4竖直方向不同心频谱图(实测)

    表  1  节点位置

    节点 位置/m 备注 节点 位置/m 备注
    1 0.000 轴承1 14 0.965
    2 0.043 15 1.010 轴承3
    3 0.083 盘1 16 1.098
    4 0.123 17 0.415
    5 0.164 盘2 18 0.440 轴承4
    6 0.204 19 0.490
    7 0.260 轴承2 20 0.548 盘4
    8 0.380 21 0.636
    9 0.500 22 0.724 盘5
    10 0.620 23 0.792
    11 0.740 24 0.860 轴承5
    12 0.860 轴承5 25 0.885
    13 0.925 盘3
    下载: 导出CSV

    表  2  轴承型号及支承刚度

    轴承 型号 Kxx/(N·m-1) Kyy/(N·m-1)
    1 NU1013 2.5×105 2.5×105
    2 7013AC 15.0×105 15.0×105
    3 NU1013 15.0×105 15.0×105
    4 7013AC 2.5×105 2.5×105
    5 NU1013 25.1×105 25.1×105
    下载: 导出CSV

    表  3  配重盘参数

    外径/m 内径/m 厚度/m 密度/(kg·m-3)
    0.240 0.070 0.038 7 850
    下载: 导出CSV
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  • 收稿日期:  2019-05-11
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