| Citation: | WANG Qi, JIA Ruidong, YANG Shuhua, et al. Modelling of pre-tightening force in rod-fastened rotors and it induced vibration localization[J]. Journal of Aerospace Power, 2023, 38（12）：3020-3030 doi: 10.13224/j.cnki.jasp.20210383
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In order to explore the mechanism of the vibration induced by the pre-tightening mistune of the rod-fastened rotor considering the mechanical characteristics of the contact surface, and viewed from the elastoplastic theory and the microscopics of the contact surface, the deformation laws and mechanical characteristics of a single asperity in the contact process were analyzed in detail, and the macroscopic mechanical contact model of the contact surface was obtained through Gaussian distribution. First, an equivalent contact layer was established to ensure that the main characteristic parameters of the original model could be kept unchanged and its thickness was determined, based on the mechanical properties of the contact surface; then, the variation law of critical speed and natural frequency when the pre-tightening force was reduced and detuned in the circumferential direction was further analyzed by this equivalent contact layer model; finally, the mechanism of vibration mode localization of rod-fastened rotor induced by circumferential detuning of pre-tightening force was revealed by means of wave transmission. The results showed that the equivalent contact layer stiffness and the critical speed and natural frequency decreased as the pre-tightening reduced. Moreover, the critical speed and natural frequency of the rotor became lower, as the number of pre-tightening detuning rods increased. As the fluctuation frequency of the rod-fastened rotor was within the frequency stop-band, the vibration energy cannot be transmitted throughout the whole structure. The research results can provide a reference method for the dynamic analysis and optimal design of complex rod-fastened rotors.
| [1] |
TALAH D, BENTARZI H. Modeling and analysis of heavy-duty gas turbine based on frequency dependent model[R]. Istanbul: International Conference on Electrical Engineering, 2020.
|
| [2] |
张颖. GE9FA重型燃气轮机建模与控制研究[D]. 河北 保定: 华北电力大学, 2014.
ZHANG Ying. Research on the model and control systems of the GE9FA heavy-duty gas turbine[D]. Baoding Hebei: North China Electric Power University, 2014. (in Chinese)
|
| [3] |
王延博. 电站大型燃气轮机振动特性[J]. 热力发电,2002,31(3): 29-32, 40.
WANG Yanbo. Vibration characteristics of large gas turbine in power station[J]. Thermal Power Generation,2002,31(3): 29-32, 40. (in Chinese)
|
| [4] |
袁奇,高进,李浦,等. 重型燃气轮机转子结构及动力学特性研究综述[J]. 热力透平,2013,42(4): 294-301.
YUAN Qi,GAO Jin,LI Pu,et al. A review for structure and dynamic characteristics of heavy-duty gas turbine rotor[J]. Thermal Turbine,2013,42(4): 294-301. (in Chinese)
|
| [5] |
陈力涛. 燃气轮机拉杆转子系统动力特性和不平衡响应研究[D]. 南京: 东南大学, 2012.
CHEN Litao. Study on dynamic characteristics and unbalanced response of gas turbine tie-rod rotor system[D]. Nanjing: Southeast University, 2012. (in Chinese)
|
| [6] |
ANDERSON P W. Absence of diffusion in certain random lattices[J]. Physical Review,1958,109(5): 1492-1505. doi: 10.1103/PhysRev.109.1492
|
| [7] |
HODGES C H. Confinement of vibration by structural irregularity[J]. Journal of Sound and Vibration,1982,82(3): 411-424. doi: 10.1016/S0022-460X(82)80022-9
|
| [8] |
王毅泽. 周期结构中弹性波的色散关系与振动局部化问题研究[D]. 哈尔滨: 哈尔滨工业大学, 2006.
WANG Yize. Study on the elastic wave dispersion relation of periodic structure and vibration localization[D]. Harbin: Harbin Institute of Technology, 2006. (in Chinese)
|
| [9] |
赵润超. 燃气轮机拉杆转子模型等效约化方法及动力学分析[D]. 哈尔滨: 哈尔滨工业大学, 2020.
ZHAO Runchao. Model equivalent reduction method and dynamic analysis of rod-fastening gas turbine rotor[D]. Harbin: Harbin Institute of Technology, 2020. (in Chinese)
|
| [10] |
李玲,蔡安江,蔡力钢,等. 螺栓结合面微观接触模型[J]. 机械工程学报,2016,52(7): 205-212. doi: 10.3901/JME.2016.07.205
LI Ling,CAI Anjiang,CAI Ligang,et al. Micro-contact model of bolted-joint interface[J]. Journal of Mechanical Engineering,2016,52(7): 205-212. (in Chinese) doi: 10.3901/JME.2016.07.205
|
| [11] |
LIN L P,LIN J F. An elastoplastic microasperity contact model for metallic materials[J]. Journal of Tribology,2005,127(3): 666-672. doi: 10.1115/1.1843830
|
| [12] |
VAKIS A I. Asperity interaction and substrate deformation in statistical summation models of contact between rough surfaces[J]. Journal of Applied Mechanics,2014,81(4): 041012-1-041012-10. doi: 10.1115/1.4025413
|
| [13] |
KOGUT L,ETSION I. Elastic-plastic contact analysis of a sphere and a rigid flat[J]. Journal of Applied Mechanics,2002,69(5): 657-662. doi: 10.1115/1.1490373
|
| [14] |
田红亮. 机械结构固定结合部虚拟材料的动力学建模[D]. 武汉: 华中科技大学, 2011.
TIAN Hongliang. Dynamic modeling on fixed joint interface virtual material in mechanical structure[D]. Wuhan: Huazhong University of Science and Technology, 2011. (in Chinese)
|
| [15] |
李辉光,刘恒,虞烈. 粗糙机械结合面的接触刚度研究[J]. 西安交通大学学报,2011,45(6): 69-74.
LI Huiguang,LIU Heng,YU Lie. Contact stiffness of rough mechanical joint surface[J]. Journal of Xi’an Jiaotong University,2011,45(6): 69-74. (in Chinese)
|
| [16] |
赵问银,张家忠,周成武. 大型离心叶轮振动模态局部化特性研究[J]. 应用力学学报,2012,29(6): 699-704, 775.
ZHAO Wenyin,ZHANG Jiazhong,ZHOU Chengwu. Study on the vibration localization in the centrifugal Impeller with periodic structures[J]. Chinese Journal of Applied Mechanics,2012,29(6): 699-704, 775. (in Chinese)
|
| [17] |
祝梦洁,张锁怀,丁鑫. 分布式拉杆转子预紧失谐对固有频率的影响[J]. 机床与液压,2020,48(13): 17-21. doi: 10.3969/j.issn.1001-3881.2020.13.004
ZHU Mengjie,ZHANG Suohuai,DING Xin. Effects of pre-tightening detuning on the natural frequency of distributed tie-rod rotor[J]. Machine Tool & Hydraulics,2020,48(13): 17-21. (in Chinese) doi: 10.3969/j.issn.1001-3881.2020.13.004
|
| [18] |
ZHANG Hongyuan,YUAN Huiqun,YANG Wenjun,et al. Research on vibration localization of mistuned bladed disk system[J]. Journal of Vibroengineering,2017,19(5): 3296-3312. doi: 10.21595/jve.2017.17822
|
| [19] |
王建军,于长波,姚建尧,等. 失谐叶盘振动模态局部化定量描述方法[J]. 推进技术,2009,30(4): 457-461, 473.
WANG Jianjun,YU Changbo,YAO Jianyao,et al. Vibratory mode localization factors of mistuned bladed disk assemblies[J]. Journal of Propulsion Technology,2009,30(4): 457-461, 473. (in Chinese)
|
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