圆柱面配合对柔性转子稳定性的影响

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英文篇名：Analysis on the impact of cylindrical surface fit on flexible rotor 作者：曾瑶 ; 陈亮 ; 蒋云帆 ; 庞燕龙 ; 吴凡 英文作者：ZENG Yao;CHEN Liang;JIANG Yun-fan;PANG Yan-long;WU Fan;AECC Sichuan Gas Turbine Establishment; 关键词：航空发动机 ; 转子系统 ; 圆柱面过盈配合 ; 内阻尼 ; 失稳振动 ; 稳定性 英文关键词：aero-engine;;rotor system;;cylindrical surface interference fit;;internal damp;;unstable vibration;;stability 中文刊名：RQWL 英文刊名：Gas Turbine Experiment and Research 机构：中国航发四川燃气涡轮研究院; 出版日期：2019-04-15 出版单位：燃气涡轮试验与研究 年：2019 期：v.32;No.139 语种：中文; 页：RQWL201902009 页数：7 CN：02 ISSN：51-1453/V 分类号：46-52

摘要

针对圆柱面过盈配合产生的内阻尼对转子稳定性的影响进行研究。建立运动微分方程,将配合面的内摩擦力等效为内阻尼力,揭示了内阻尼对转子稳定性的影响机理。利用Runge-Kutta法对转子系统的稳定性进行计算,分析了配合面的摩擦系数、长度和紧度以及外阻尼等参数对转子稳定性的影响规律。结果表明,圆柱面过盈配合产生的内摩擦力可以等效为内阻尼力,内阻尼系数进一步分解出反对称交叉刚度分量,引起转子系统的不稳定;配合面的摩擦系数、长度和紧度以及外阻尼等参数均对转子的失稳门槛转速有较大影响;配合面的长度和紧度是由圆柱面过盈配合引起的转子失稳振动中的重要因素,决定了转子是否存在不稳定因素,设计中应合理选择。
        The impact of internal damping caused by cylindrical surface interference fit on rotor stability was studied. Assuming that the internal friction of fitting surface equals to internal damp, the motion differential equation was set to reveal the impact of internal damp on rotor stability. The stability of rotor system was analyzed using Runge-kutta method. The influence rule of parameters like the fitting surface friction coefficient, length and compactness and external damp on rotor stability was analyzed. The results show that the internal friction caused by cylindrical surface fit could equal to internal damp, and the internal damp efficient further decomposes dissymmetry cross stiffness component to give rise to the stability of rotor system.Parameters like the fitting surface friction coefficient, length and compactness and external damp have large impact on stall rotating speed of rotors. The length and compactness of fitting surface are main factors for rotor instability vibration and they should be considerably selected.

引文

[1]闻邦椿,顾家柳,夏松波,等.高等转子动力学[M].北京:机械工业出版社,1999,13-28.
    [2]晏励堂.航空燃气轮机振动和减振[M].北京:国防工业出版社,1991:183-188.
    [3]白长青,许庆余,张小龙.密封和内阻尼对火箭发动机液氢涡轮泵转子系统动力稳定性的影响[J].机械工程学报,2006,42(3):150-155.
    [4]杨喜关.气流激振力作用下转子系统稳定性分析[D].南京:南京航空航天大学,2008.
    [5]Samantaray A K,Mukherjee A,Bhattacharyya R.Some studies on rotors with polynomial type non-linear external and internal damping[J].International Journal of Non-linear Mechanics,2006,41:1007-1015.
    [6]程礼,范家栋,陈雪峰.结构阻尼对发动机转子系统稳定性的影响[J].航空动力学报,2009,24(2):360-364.
    [7]高腾,荆建平,梅庆,等.花键连接转子系统的稳定研究[J].噪声与振动控制,2016,36:40-45.
    [8]冯琳.高速轻载转子动力失稳关键原因分析与研究.大连理工大学,2008.
    [9]李婧.精细积分法在非线性振动稳定性计算中的应用[D].广州:中山大学,2006.
    [10]宋向东.汽轮发电机组动平衡及转子稳定性技术研究[D].南京:东南大学,2006.
    [11]康丽霞,曹义华,梅庆.直升机传动系统花键连接轴的动力失稳[J].北京航空航天大学学报,2010,36(6):646-649.
    [12]顾家柳,丁奎元,刘启洲,等.转子动力学[M].北京:国防工业出版社,1985.