Influences of configuration state of double-stage turbine assembly on rotor dynamic characteristics
-
摘要:
针对采用双级涡轮设计的高速转子，研究双级涡轮组件结构状态变化对转子动力特性的影响。通过表征工作载荷对双级涡轮组件界面接触状态和局部角向刚度-变形特征的影响过程，建立了双级涡轮组件结构状态分析模型，揭示了组件结构状态变化的力学机理；建立组件结构状态在转子动力学模型中的等效方法，研究其对转子固有振动特性的影响。研究表明：复杂工作载荷作用下组件中各构件变形的不协调，将引起的连接界面接触力学特性变化，造成组件角向刚度特性的改变；在旋转惯性力矩作用下，涡轮组件角向刚度存在“突降”现象，使得转子弯曲模态振型陀螺效应和临界转速显著降低。仿真结果表明：考虑涡轮组件结构状态突变后，转子弯曲模态临界转速约下降17%。
Abstract:The influences of configuration state change of double-stage high-pressure turbine assembly on rotor dynamic characteristics were studied. By studying the influence process of the working load on the interface contact state and local angular stiffness-deformation characteristics of the double-stage turbine assembly, the configuration states analysis model of the double-stage turbine assembly was established, and the mechanical mechanism of the configuration state change of the assembly was revealed. An equivalent modeling method of rotor dynamics considering the configuration state of assembly was established, and its influences on the rotor dynamics characteristics were studied. The research showed that the uncoordinated deformation of each component in the assembly caused by the complex working load could cause the change of the interface contact mechanical properties and the angular stiffness characteristics of the assembly. Due to the effect of the rotating inertia moment, there was a “sudden drop” phenomenon in the angular stiffness of the double-turbine assembly, which significantly reduced gyroscopic effect and critical speed of the rotor bending mode. The simulation results showed that the critical rotational speed of the rotor bending mode decreased by about 17% after considering the sudden change in the configuration state of the double-turbine assembly.
-
图 3 双级涡轮组件变形示意图（装配阶段）
Figure 3. Schematic diagram of deformation of double-stage turbine assembly （assembling stage）
图 4 双级涡轮组件变形示意图（离心载荷）
Figure 4. Schematic diagram of deformation of double-stage turbine assembly （centrifugal load）
图 5 双级涡轮组件变形示意图（轴向压力载荷）
Figure 5. Schematic diagram of deformation of double-stage turbine assembly （axial aerodynamic load）
图 6 连接界面接触状态及接触应力变化示意图
Figure 6. Variation diagram of the joint interface contact state and contact normal stress
图 7 双级涡轮组件角向刚度模型
Figure 7. Angular stiffness model of the double-stage turbine assembly
图 8 双级高压涡轮组件有限元模型
Figure 8. Finite element model of double-stage high-pressure turbine assembly
图 10 转速对止口端面压紧力的影响规律
Figure 10. Influence rule of rotate speed on pressing force of spigot end face
图 11 双级涡轮盘组件温度场分布（最大工作状态）
Figure 11. Temperature field distribution of double-stage turbine assembly （maximum operating condition）
图 12 组件轴向变形云图（最大工作状态）
Figure 12. Axial deformation diagram of assembly（maximum operating condition）
图 13 止口端面压紧力对组件角向刚度的影响规律
Figure 13. Influence rule of pressing force of spigot end face on angular stiffness of assembly
图 14 组件角度刚度突变的机理解释图
Figure 14. Mechanism explanation diagram of sudden change in angular stiffness of assembly
图 15 组件轴向变形云图（Fp2=20 kN, M=
2000 N·m）Figure 15. Axial deformation nephogram of the assembly（Fp2=20 kN, M=
2000 N·m）
图 18 涡轮组件结构状态等效模拟方法示意图
Figure 18. Schematic diagram of the equivalent simulation method for configuration state of turbine assembly
图 19 考虑组件结构状态突变的转子Campbell图
Figure 19. Campbell diagram of rotor considering assembly configuration state sudden change
表 1 转子弯曲模态临界转速
Table 1. Critical speed of rotor bending mode
弯曲模态临界转速/（r/min） 变化率/% 考虑突变 不考虑突变 24473 20307 −17 
下载: 导出CSV
-
[1] 洪杰,马艳红. 航空燃气涡轮发动机结构与设计[M]. 北京: 科学出版社,2021. HONG Jie,MA Yanhong. Structure and design of aircraft gas turbine engine[M]. Beijing: Science Press,2021. (in ChineseHONG Jie, MA Yanhong. Structure and design of aircraft gas turbine engine[M]. Beijing: Science Press, 2021. (in Chinese) [2] KRASYUK A M,KOSYKH P V. Calculating bending vibrations of main axial mine fan rotor shaft[J]. Journal of Mining Science,2016,52(3): 502-510. doi: 10.1134/S1062739116030730 [3] 李小军,朱汉华,范世东,等. 船舶艉轴承刚度和螺旋桨陀螺效应对轴系回旋振动特性影响的分析[J]. 船舶力学,2019,23(7): 851-858. LI Xiaojun,ZHU Hanhua,FAN Shidong,et al. Influencing law research of stern journal bearing’s stiffness and propeller’s gyroscopic effect on whirling vibration of the ship propulsive shafting[J]. Journal of Ship Mechanics,2019,23(7): 851-858. (in Chinese doi: 10.3969/j.issn.1007-7294.2019.07.011LI Xiaojun, ZHU Hanhua, FAN Shidong, et al. Influencing law research of stern journal bearing’s stiffness and propeller’s gyroscopic effect on whirling vibration of the ship propulsive shafting[J]. Journal of Ship Mechanics, 2019, 23(7): 851-858. (in Chinese) doi: 10.3969/j.issn.1007-7294.2019.07.011 [4] GONG Yongping,EHMANN K F,LIN Cheng. Analysis of dynamic characteristics of micro-drills[J]. Journal of Materials Processing Technology,2003,141(1): 16-28. doi: 10.1016/S0924-0136(02)00947-0 [5] LIN Chiwei,TU J F,KAMMAN J. An integrated thermo-mechanical-dynamic model to characterize motorized machine tool spindles during very high speed rotation[J]. International Journal of Machine Tools and Manufacture,2003,43(10): 1035-1050. doi: 10.1016/S0890-6955(03)00091-9 [6] SHE Houxin,LI Chaofeng,TANG Qiansheng,et al. Influence mechanism of disk position and flexibility on natural frequencies and critical speeds of a shaft-disk-blade unit[J]. Journal of Sound and Vibration,2020,469: 115156. doi: 10.1016/j.jsv.2019.115156 [7] 刘伟佳. 陀螺效应对转子临界转速的影响[J]. 吉林师范大学学报(自然科学版),2012,33(3): 47-49. LIU Weijia. Impact of gyroscopic effect on the critical speed of the rotor[J]. Jilin Normal University Journal (Natural Science Edition),2012,33(3): 47-49. (in ChineseLIU Weijia. Impact of gyroscopic effect on the critical speed of the rotor[J]. Jilin Normal University Journal (Natural Science Edition), 2012, 33(3): 47-49. (in Chinese) [8] 陈萌,马艳红,刘书国,等. 航空发动机整机有限元模型转子动力学分析[J]. 北京航空航天大学学报,2007,33(9): 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(9): 1013-1016. (in Chinese doi: 10.3969/j.issn.1001-5965.2007.09.003CHEN 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(9): 1013-1016. (in Chinese) doi: 10.3969/j.issn.1001-5965.2007.09.003 [9] 谢强. 转子活塞发动机动力学特性研究与分析[D]. 长沙: 国防科学技术大学,2013: 36-38. XIE Qiang. The dynamic characteristics research and analysis of the rotor engine[D]. Changsha: National University of Defense Technology,2013: 36-38. (in ChineseXIE Qiang. The dynamic characteristics research and analysis of the rotor engine[D]. Changsha: National University of Defense Technology, 2013: 36-38. (in Chinese) [10] MAT ISA A A,PENNY J,GARVEY S D. Dynamics of bolted and laminated rotors [C]// The International Society for Optical Engineering,San Antonio: SPIE,2000: 867-872. [11] KLOMPAS N. Effects of anomalous rotor joints on turbomachine dynamics[J]. Journal of Engineering for Power,1983,105(4): 927-934. doi: 10.1115/1.3227502 [12] 姚星宇,王建军,翟学. 航空发动机螺栓连接薄层单元建模方法[J]. 北京航空航天大学学报,2015,41(12): 2269-2279. YAO Xingyu,WANG Jianjun,ZHAI Xue. Modeling method of bolted joints of aero-engine based on thin-layer element[J]. Journal of Beijing University of Aeronautics and Astronautics,2015,41(12): 2269-2279. (in ChineseYAO Xingyu, WANG Jianjun, ZHAI Xue. Modeling method of bolted joints of aero-engine based on thin-layer element[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2269-2279. (in Chinese) [13] 姚星宇,王建军. 航空发动机螺栓连接载荷与结构参数对连接刚度影响规律[J]. 推进技术,2017,38(2): 424-433. YAO Xingyu,WANG Jianjun. Effects of load and structure parameters of aero-engine bolted joints on joint stiffness[J]. Journal of Propulsion Technology,2017,38(2): 424-433. (in ChineseYAO Xingyu, WANG Jianjun. Effects of load and structure parameters of aero-engine bolted joints on joint stiffness[J]. Journal of Propulsion Technology, 2017, 38(2): 424-433. (in Chinese) [14] QIN Z Y,HAN Q K,CHU F L. Analytical model of bolted disk-drum joints and its application to dynamic analysis of jointed rotor[J]. Proceedings of the Institution of Mechanical Engineers,Part C: Journal of Mechanical Engineering Science,2014,228(4): 646-663. doi: 10.1177/0954406213489084 [15] QIN Zhaoye,HAN Qinkai,CHU Fulei. Bolt loosening at rotating joint interface and its influence on rotor dynamics[J]. Engineering Failure Analysis,2016,59: 456-466. doi: 10.1016/j.engfailanal.2015.11.002 [16] 洪杰,徐翕如,苏志敏,等. 高速转子连接结构刚度损失及振动特性[J]. 北京航空航天大学学报,2019,45(1): 18-25. HONG Jie,XU Xiru,SU Zhimin,et al. Joint stiffness loss and vibration characteristics of high-speed rotor[J]. Journal of Beijing University of Aeronautics and Astronautics,2019,45(1): 18-25. (in ChineseHONG Jie, XU Xiru, SU Zhimin, et al. Joint stiffness loss and vibration characteristics of high-speed rotor[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(1): 18-25. (in Chinese) [17] ZHUO M,YANG L H,YU L. Contact stiffness calculation and effects on rotordynamic of rod fastened rotor[R]. Colin McAteer: ASME International Mechanical Engineering Congress and Exposition (IMECE2016),2016. [18] HONG Jie,CHEN Xueqi,WANG Yongfeng,et al. Optimization of dynamics of non-continuous rotor based on model of rotor stiffness[J]. Mechanical Systems and Signal Processing,2019,131: 166-182. doi: 10.1016/j.ymssp.2019.05.030 [19] 马艳红,倪耀宇,陈雪骑,等. 长拉杆-止口连接弯曲刚度损失及对转子系统振动响应影响[J]. 航空学报,2021,42(3): 223861. MA Yanhong,NI Yaoyu,CHEN Xueqi,et al. Bending stiffness loss of rod-rabbet joints and its effect on vibration response of rotor systems[J]. Acta Aeronautica et Astronautica Sinica,2021,42(3): 223861. (in ChineseMA Yanhong, NI Yaoyu, CHEN Xueqi, et al. Bending stiffness loss of rod-rabbet joints and its effect on vibration response of rotor systems[J]. Acta Aeronautica et Astronautica Sinica, 2021, 42(3): 223861. (in Chinese) -
点击查看大图
计量
- 文章访问数: 241
- HTML浏览量: 72
- PDF量: 127
- 被引次数: 0