|
|
论文:2013,Vol:31,Issue(6):926-930 |
|
|
引用本文： |
|
|
任兴民, 卢娜, 岳聪, 南国防, 邓旺群. 考虑转速及碰摩的带冠涡轮叶片动力特性研究[J]. 西北工业大学 |
|
|
Ren Xingmin, Lu Na, Yue Cong, Nan Guofang, Deng Wangqun. Dynamic Characteristics of Flexible Shrouded Blades in Aero-engines[J]. Northwestern polytechnical university |
|
|
|
|
|
|
|
| 考虑转速及碰摩的带冠涡轮叶片动力特性研究 |
|
| 任兴民1, 卢娜1, 岳聪1, 南国防1, 邓旺群2 |
|
1. 西北工业大学 振动工程研究所, 陕西 西安 710072;
2. 中国航空动力机械研究所, 湖南 株洲 412002 |
| 摘要: |
| 研究了考虑旋转及碰摩复合作用的带冠叶片振动特性。建立了模拟带冠涡轮叶片循环对称结构的梁-质量-弹簧模型;采用欧拉-贝努利梁理论,将系统放入转速引起的离心力场中,研究旋转状态下带冠叶片的动力特性;推导出了考虑离心力、气流激振力及碰摩复合作用的系统动力学方程;基于推导出的方程,研究了叶冠接触角、气流激振力、摩擦因数、刚度比和间隙等参数对系统稳态响应的影响规律。此外,还对系统的非线性特性进行了一定的研究。文中的分析方法及数值结果对于叶冠设计及振动控制有一定的参考价值。 |
| 关键词:
转速
碰摩
带冠叶片
系统参数
动力特性
|
|
| Dynamic Characteristics of Flexible Shrouded Blades in Aero-engines |
|
| Ren Xingmin1, Lu Na1, Yue Cong1, Nan Guofang1, Deng Wangqun2 |
|
1. Institute of Vibration Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
2. AVIC Aviation Power Plant Research Institute, Zhuzhou 412002, China |
| Abstract: |
| The effect of impact and friction between shrouded blades in aero-engines under rotational speed is in-vestigated to analyze the influence of parameters of shrouded blade system on dynamic characteristics of the system. To investigate the impact and friction, a model composed of springs and a cantilever beam carrying a mass is devel-oped to simulate the cyclic symmetry structure of the shrouded blade in aero-engines.The model is placed into a centrifugal force field caused by a high rotational speed, and the centrifugal force is taken into account.The Euler-Bernoulli beam theory is employed to get the equation of motion by considering the centrifugal forces, the gas exci-tation forces and the combined effect of the impact and friction between shrouds.Based on the equation of motion, parametric analysis is performed to study the effect of the contact angle, the gas excitation force, the friction coeffi-cient, the stiffness and the gap between shrouds on the steady-state responses of the system.Numerical results and their analysis show preliminarily that the parameters have effects on the dynamic characteristics of the system.The results of the analysis are meaningful to the design of the shrouds and the control of the vibrations. |
| Key words:
aircraft engines
design
dynamic response
equations of motion
friction
mathematical models
numerical methods
stiffness
turbomachine blades
vibration analysis
vibration control
dynamic characteristics
impact
parameters of system
rotational speed
shrouded blades
|
|
| 收稿日期: 2012-12-08
修回日期:
|
| DOI: |
| 基金项目: 航空科学基金(20112108001)资助 |
| 通讯作者:
Email： |
| 作者简介: 任兴民(1960-),西北工业大学教授、博士生导师,主要从事转子动力学、振动测试等研究。
|
|
| 相关功能 |
|
|
|
|
| 作者相关文章 |
|
| 任兴民 在本刊中的所有文章 |
| 卢娜 在本刊中的所有文章 |
| 岳聪 在本刊中的所有文章 |
| 南国防 在本刊中的所有文章 |
| 邓旺群 在本刊中的所有文章 |
|
|
|
|
|
|
|
|
参考文献: |
|
|
[1] Yang B D, Menq C H. Characterization of 3D Contact Kinematics and Prediction of Resonant Response of Structure Having 3D Friction Constraint. Journal of Sound and Vibration, 1998, 217(5): 909-925
[2] Menq C H, Chidamparam P, Griffin J H. Friction Damping of Two Dimensional Motion and Its Application in Vibration Control. Journal of Sound and Vibration, 1991, 144(3): 427-447
[3] Choi S T, Chou Y T. Vibration Analysis of Elastically Supported Turbo-Machinery Blades by the Modified Differential Quadrature Method. Journal of Sound and Vibration, 2001, 2-5
[4] 丁千, 黄毅, 孙艳红. 干摩擦阻尼叶片多谐波激振的共振响应. 振动与冲击, 2005, 24(4): 103－105 Ding Qian, Huang Yi, Sun Yanhong. Resonances of Dry Friction Damped Turbine Blades under Multi-Frequencies Excitation. Journal of Vibration and Shock, 2005, 24(4): 103-105 (in Chinese)
[5] 谢永慧, 张荻. 汽轮机阻尼围带长叶片振动特性研究. 中国电机工程学报, 2005, 25(18): 86-90 Xie Yonghui, Zhang Di. Numerical Model for Vibration Characteristic of Steam Turbine Blade with Damped Shroud. Proceedings of the CSEE, 2005, 25(18): 86-90 (in Chinese)
[6] Cao Dengqing, Gong Xiaochun, Wei Dong, et al. Nonlinear Vibration Characteristics of a Flexible Blade with Friction Damping Due to Tip-Rub. Shock and Vibration, 2011, 18(1/2): 105-114 |
|
|
|
|
|
|
|
