Test on vibration characteristics of rotor system under sudden base shock excitation
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摘要:
针对着舰过程中航空发动机转子系统受到的突加基础冲击激励的问题, 基于典型小涵道比涡扇发动机结构特征相似原则设计转子-支承-机匣系统试验器,对突加基础冲击激励下转子系统振动特性进行试验研究。结果表明:突加基础冲击激励瞬时具有显著的冲击效应,转子系统瞬态振动响应加剧并激起转子的正反进动和横向振动模态。转子系统轮盘处振幅比随基础冲击速度的增加而非线性增长,突加纵向基础冲击激励比突加横向基础冲击激励更能影响转子系统的振动特性。
Abstract:A rotor-supporting-casing system test rig was designed to investigate the vibration response of turbofan rotor in time domain and frequency domain under sudden base shock excitation during the process of landing, based on the equivalence principle of structural characteristics of the typical low bypass ratio turbofan engine. Results showed that sudden base shock excitation led to significant impact on rotor, the aggravation of rotor’s transient response, the positive and negative precession and flexural resonance. The amplitude ratio of the disk of rotor system increased nonlinearly with the increase of the impact velocity of base, and the longitudinal sudden base shock excitation had more influence on the vibration characteristics of the rotor system than the transverse sudden base shock excitation.
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Key words:
- rotor system /
- base excitation /
- vibration test /
- transient response /
- orbits
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表 1 试验工况参数
Table 1. Test condition parameters
转子
类型冲击
方向落震高度
H/m冲击速度
V/(m/s)转子转速
n/(r/min)卧式转子 纵向 0.110.320.631.031.541.84 1.52.53.54.55.56.0 3000,4000,
5000,7000立式转子 横向 0.200.460.821.281.842.50 2.03.04.05.06.07.0 -
[1] 洪杰, 马艳红, 张大义. 航空燃气轮机总体结构设计与动力学分析[M]. 北京: 北京航空航天大学出版社, 2014. [2] 陈巍,杜发荣,丁水汀,等. 超高速转子系统动力学特性: Ⅱ 碰摩转子[J]. 推进技术,2012,33(6): 866-874.CHEN Wei,DU Farong,DING Shuiting,et al. Research on dynamic characteristics for a super-high speed rotor system: Ⅱ rotor system with rubs[J]. Journal of Propulsion Technology,2012,33(6): 866-874. (in Chinese) [3] 雷冰龙,李超,何康,等. 共用支承-转子系统耦合振动分析及试验[J]. 航空动力学报,2020,35(11): 2293-2305. doi: 10.13224/j.cnki.jasp.2020.11.006LEI Binglong,LI Chao,HE Kang,et al. Coupling vibration characteristics analysis and experiment of shared support-rotors system[J]. Journal of Aerospace Power,2020,35(11): 2293-2305. (in Chinese) doi: 10.13224/j.cnki.jasp.2020.11.006 [4] NELSON H D,MEACHAM W L,FLEMING D P,et al. Nonlinear analysis of rotor-bearing systems using component mode synthesis[J]. Journal of Engineering for Power,1983,105: 614-660. [5] OEZGUEVEN H N,OEZKAN Z L. Whirl speeds and unbalance response of multibearing rotors using finite elements[J]. Journal of Vibration and Acoustics,1984,106(1): 72-79. doi: 10.1115/1.3269158 [6] GREENHILL L M,BICKFORD W B,NELSON H D. A conical beam finite element for rotor dynamics analysis[J]. Journal of Vibration and Acoustics,1985,107(4): 421-430. doi: 10.1115/1.3269283 [7] KOIKE H,ISHIHARA K. Impact response of rotor-bearing system to an arbitrary excitation of pedestals: 1st report comparison of linear analysis with experiment[J]. Bulletin of JSME(Japanese Society of Mechanical Engineers),1983,26(220): 1783-1790. doi: 10.1299/jsme1958.26.1783 [8] SAMALI B,KIM K B,YANG J N. Random vibration of rotating machines under earthquake excitations[J]. Journal of Engineering Mechanics,1986,112(6): 550-565. doi: 10.1061/(ASCE)0733-9399(1986)112:6(550) [9] 贺少华,吴新跃. 舰载旋转机械基础冲击响应建模和数值计算[J]. 爆炸与冲击,2011,31(6): 561-566.HE Shaohua,WU Xinyue. Shock response modeling and computation of shipboard rotating machinery subjected to base-transferred shock force[J]. Explosion and shock waves,2011,31(6): 561-566. (in Chinese) [10] 游震洲,黄其祥,王锋,等. 转子-基础系统的随机不确定建模与振动分析[J]. 航空动力学报,2016,31(1): 1-9. doi: 10.13224/j.cnki.jasp.2016.01.001YOU Zhenzhou,HUANG Qixiang,WANG Feng,et al. Random uncertainty modeling and vibration analysis of rotor-foundation system[J]. Journal of Aerospace Power,2016,31(1): 1-9. (in Chinese) doi: 10.13224/j.cnki.jasp.2016.01.001 [11] 祝长生,陈拥军. 机动飞行时发动机转子系统动力学统一模型[J]. 航空动力学报,2009,24(2): 371-377. doi: 10.13224/j.cnki.jasp.2009.02.012ZHU Changsheng,CHEN Yongjun. General dynamic model of aeroengine’s rotor system during maneuvering flight[J]. Journal of Aerospace Power,2009,24(2): 371-377. (in Chinese) doi: 10.13224/j.cnki.jasp.2009.02.012 [12] DAS A S,DUTT J K,RAY K. Active vibration control of flexible rotors on maneuvering vehicles[J]. AIAA Journal,2010,48(2): 340-353. doi: 10.2514/1.43378 [13] 李杰,曹树谦,郭虎伦,等. 机动飞行条件下双转子系统动力学建模与响应分析[J]. 航空动力学报,2017,32(4): 835-849. doi: 10.13224/j.cnki.jasp.2017.04.008LI Jie,CAO Shuqian,GUO Hulun,et al. Modeling and response analysis of dual-rotor system under maneuvering flight[J]. Journal of Aerospace Power,2017,32(4): 835-849. (in Chinese) doi: 10.13224/j.cnki.jasp.2017.04.008 [14] 虞烈, 刘恒. 轴承-转子系统动力学[M]. 西安: 西安交通大学出版社, 2001. [15] 闻邦椿, 顾家柳, 夏松波, 等. 高等转子动力学-理论、技术与应用[M]. 北京: 机械工业出版社, 2000. [16] KANG Y,CHANG Y P,TSAI J W,et al. An investigation in stiffness effects on dynamics of rotor-bearing-foundation systems[J]. Journal of Sound and Vibration,2000,231(2): 343-374. doi: 10.1006/jsvi.1999.2719 [17] HAN Q, DONG X, WEN B. Resonance capture of rotor system mounted on an elastically supported base[R]. Seoul, Korea: IFToMM 8th International Conference on Rotor Dynamics, 2010. [18] CAVALCA K L, OKABE E P. On analysis of rotor- bearing-foundation system[R]. New Delhi, India: IUTAM Symposium on Emerging Trends in Rotor Dynamic, 2011. [19] CHEN X,GAN X H,REN G M. Nonlinear responses and bifurcations of a rotor-bearing system supported by squeeze-film damper with retainer spring subjected to base excitations[J]. Nonlinear Dynamics,2020,102(4): 1-35. [20] DUCHEMIN M,BERLIOZ A,FERRARIS G. Dynamic behavior and stability of a rotor under base excitation[J]. Journal of Vibration and Acoustics,2006,128(5): 576-585. doi: 10.1115/1.2202159 [21] DRIOT N,LAMARQUE C H,BERLIOZ A. Theoretical and experimental analysis of a base-excited rotor[J]. Journal of Computational and Nonlinear Dynamics,2006,1(3): 257-263. doi: 10.1115/1.2209648 [22] 颜文忠,KONSTANTIN S,张大义,等. 基础振动对转子系统动力特性影响的试验研究[J]. 推进技术,2016,37(11): 2157-2164. doi: 10.13675/j.cnki.tjjs.2016.11.021YAN Wenzhong,KONSTANTIN S,ZHANG Dayi,et al. Experimental investigation on dynamic characteristics of rotor system subject to foundation vibration[J]. Journal of Propulsion Technology,2016,37(11): 2157-2164. (in Chinese) doi: 10.13675/j.cnki.tjjs.2016.11.021 [23] 杨泽东. 突加高能基础激励载荷作用下转子系统响应特性及稳定性研究[D]. 南京: 南京航空航天大学, 2020.YANG Zedong. Study on response characteristics and stability of rotor system under sudden high energy excitation load[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2020. (in Chinese)