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首页> 外文期刊>The Aeronautical Journal >Analysis of mistuned forced response in an axial high-pressure compressor rig with focus on Tyler-Sofrin modes
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Analysis of mistuned forced response in an axial high-pressure compressor rig with focus on Tyler-Sofrin modes

机译：以Tyler-Sofrin模式为重点的轴向高压压缩机装置的失谐力响应分析

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This paper aims at contributing to a better understanding of the effect of Tyler-Soft in Modes (TSMs) on forced vibration responses by analysing a 4.5-stage research axial compressor rig. The first part starts with a brief review of the involved physical mechanisms and necessary prerequisites for the generation of TSMs in multistage engines. This review is supported by unsteady CFD simulations of a quasi 2D section of the studied engine. It is shown that the amplitude increasing effect due to mistuning can be further amplified by the presence of TSMs. Furthermore, the sensitivity with respect to the structural coupling of the blades and the damping as well as the shape of the expected envelope is analysed.The second part deals with the Rotor 2 blisk of the research compressor rig. The resonance of a higher blade mode with the engine order of the upstream stator is studied in two different flow conditions realised by different variable stator vane (VSV) schedules which allows to separate the influence of TSMs from the impact of mistuning. A subset of nominal system modes representation of the rotor is used to describe its mistuned vibration behaviour, and unsteady CFD simulations are used to characterise the present strength of the TSMs in the particular operating conditions. Measured maximum amplitude vs blade pattern and frequency response functions are compared against the predictions of the aeromechanical models in order to assess the strength of the TSMs as well as its influence on vibration levels.
机译：本文旨在通过分析4.5阶段的研究轴向压缩机装置，为更好地理解Tyler-Soft in Modes（TSM）对强迫振动响应的影响做出贡献。第一部分从简要回顾所涉及的物理机制和在多级发动机中生成TSM的必要前提开始。这项研究得到所研究发动机的准2D截面的非稳态CFD模拟的支持。结果表明，由于TSM的存在，可以进一步放大由于模糊引起的幅度增加效应。此外，分析了叶片在结构耦合和阻尼方面的敏感性以及预期包络线的形状。第二部分研究了研究型压缩机装置的转子2叶盘。在通过不同的可变定子叶片（VSV）时间表实现的两种不同的流动条件下，研究了较高叶片模式与上游定子的发动机共振的情况，这可以将TSM的影响与雾化的影响分开。转子的名义系统模式表示的子集用于描述其失谐的振动行为，不稳定的CFD仿真用于表征TSM在特定操作条件下的当前强度。为了评估TSM的强度及其对振动水平的影响，将测得的最大振幅对叶片模式和频率响应函数与航空力学模型的预测进行了比较。

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