失谐叶栅的受迫振动响应特性分析

doi:10.7527/S1000-6893.2017.621018

航空发动机内流与传热技术发展专栏

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失谐叶栅的受迫振动响应特性分析

张伟伟¹, 高弈奇¹, 全金楼², 苏丹¹

1. 西北工业大学翼型叶栅空气动力学国家重点实验室, 西安 710072;
2. 中国航发四川燃气涡轮研究院, 成都 610500

收稿日期:2016-12-05 修回日期:2017-02-26 出版日期:2017-09-15 发布日期:2017-03-20
通讯作者: 张伟伟 E-mail:aeroelastic@nwpu.edu.cn
基金资助:
国家自然科学基金（11172237）

Characteristics analysis of forced vibration response of mistuned cascades

ZHANG Weiwei¹, GAO Yiqi¹, QUAN Jinlou², SU Dan¹

1. National Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical University, Xi'an 710072, China;
2. AECC Sichuan Gas Turbine Establishment, Chengdu 610500, China

Received:2016-12-05 Revised:2017-02-26 Online:2017-09-15 Published:2017-03-20
Supported by:
National Natural Science Foundation of China (11172237)

摘要/Abstract

摘要：

采用基于计算流体力学（CFD）方法的降阶气动力模型并耦合结构运动方程，实现了存在外激励载荷时失谐叶栅受迫振动响应的快速分析。针对典型的跨声速叶栅，通过求解其位移响应幅值较系统地研究了失谐方式、失谐强度和叶片质量比对失谐叶栅受迫振动响应幅值的影响。研究表明文中刚度失谐形式可以改善叶栅振动的稳定性，同时导致系统受迫振动响应局部化程度的增加，并且受迫响应的最大振幅放大因子随失谐强度增加或者质量比降低存在先增大后减小的一个峰值，不同失谐形式则对这个峰值的大小有着明显的影响。由于该方法可高效地分析失谐叶栅受迫振动各参数对模态局部化的影响，在工程上有一定的应用价值。

关键词: 计算流体力学(CFD), 降阶模型(ROM), 流固耦合, 失谐, 受迫响应

Abstract:

This paper employs a reduced order aerodynamic model based on Computational Fluid Dynamics (CFD), coupled with the structural dynamic equation, to analyze the forced vibration response of the mistuned cascade. The displacement amplitude of the typical transonic cascade in the tuned and mistuned cases are calculated by the proposed method, and the effect of mistuning patterns, mistuning strengths and mass ratios on the forced vibration response amplitude of the mistuned cascade are investigated quantitatively. The results show that the stiffness mistuning patterns in this paper can improve the stability of the cascade, but can also result in the increase of the modal localized level. The maximum vibration amplitude magnification factor has a peak value as the mistuning strength increases or the mass ratio decreases, and the peak value is significantly affected by mistuning patterns. Due to its efficiency in the analysis of the modal localization of the mistuned cascade with forced vibration, the proposed method is beneficial for engineering applications.

Key words: computational fluid dynamics (CFD), reduced order model (ROM), fluid-structrual coupling, mistuning, forced response

中图分类号:

V211.47

张伟伟, 高弈奇, 全金楼, 苏丹. 失谐叶栅的受迫振动响应特性分析[J]. 航空学报, 2017, 38(9): 521018-521018.

ZHANG Weiwei, GAO Yiqi, QUAN Jinlou, SU Dan. Characteristics analysis of forced vibration response of mistuned cascades[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(9): 521018-521018.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

失谐叶栅的受迫振动响应特性分析

Characteristics analysis of forced vibration response of mistuned cascades

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