基于Kriging插值的失谐叶盘气动  结构耦合振动特性分析

中国机械工程

基于Kriging插值的失谐叶盘气动结构耦合振动特性分析

杨文军1，2;张锴锋1;王磊1，2;袁惠群3

1.沈阳航空航天大学机电工程学院，沈阳，110136
2.沈阳航空航天大学航空制造工艺数字化国防重点学科实验室，沈阳，110136
3.东北大学机械工程与自动化学院，沈阳，110819

出版日期:2018-06-25 发布日期:2018-06-26
基金资助:
辽宁省教育厅系列项目（L201746）；
沈阳航空航天大学青年人才启动基金资助项目（17YB04）

Aerodynamics-structure Coupling Vibrations of Mistuning Blade-disk Based on Kriging Interpolation

YANG Wenjun1，2;ZHANG Kaifeng1;WANG Lei1，2;YUAN Huiqun3

1.School of Mechatronics Engineering，Shenyang Aerospace University，Shenyang，110136
2.State Key Laboratory for Aviation Digital Manufacturing Process，Shenyang Aerospace University，Shenyang，110136
3.School of Mechanical Engineering and Automation，Northeastern University，Shenyang，110819

Online:2018-06-25 Published:2018-06-26

摘要/Abstract

摘要： 以某型航空发动机压气机转子为研究对象，考虑叶盘间动静干涉的影响，对压气机叶盘转子内部的三维流场进行了模拟。通过静频试验引入叶片失谐量，基于Kriging模型完成了耦合界面载荷数据的传递，分析了压气机转子叶片表面非定常气动载荷的分布规律，并讨论了失谐和气动载荷对压气机转子叶盘系统振动特性的影响。结果表明：压气机叶片受到的气动载荷为非定常脉动压力，主导频率为动静干涉频率f0的倍频；在干涉周期T内，压力面和吸力面气动载荷的变化呈相反趋势，且压力面气动载荷的非定常性明显大于吸力面气动载荷的非定常性；失谐和气动载荷的作用加剧了叶盘系统的振动。研究结果为压气机叶盘转子系统的动力学设计提供了理论依据。

关键词: 压气机转子, 非定常流场, 气动载荷, Kriging插值, 失谐振动

Abstract: Considering the interactions of stator-rotor blade rows，flow characteristics of an aero-engine compressor were simulated with the numerical method.Stiffness mistuning was set by the test of static frequency.Load transfer of aerodynamic pressure was achieved from flow field to blade structure based on the interpolation method of Kriging model.Then distribution law of aerodynamic load was analyzed on compressor blades.In addition，the effects of stiffness mistuning and aerodynamic load on vibration characteristics of blade-disk system were discussed.The results show unsteady aerodynamic load on compressor rotor blades fluctuates periodically，and dominant frequencies are mainly at the frequency doubling of stator-rotor interaction f0.In the interaction period T，variations of aerodynamic load on pressure and suction surfaces take the contrary trend，unsteady characteristics of aerodynamic load are far greater on pressure surface than that on suction surface.By the effects of mistuning factor and aerodynamic load，the vibrations of blade-disk are enhanced seriously.The research results provide the theoretical basis for dynamics design of compressor blade-disk rotor systems.

Key words: compressor rotor system, unsteady flow field, aerodynamic load, Kriging interpolation, mistuning vibration

中图分类号:

V231.3

杨文军1，2;张锴锋1;王磊1，2;袁惠群3. 基于Kriging插值的失谐叶盘气动结构耦合振动特性分析[J]. 中国机械工程.

YANG Wenjun1，2;ZHANG Kaifeng1;WANG Lei1，2;YUAN Huiqun3. Aerodynamics-structure Coupling Vibrations of Mistuning Blade-disk Based on Kriging Interpolation[J]. China Mechanical Engineering.

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