航空发动机双转子系统的模态及其表达方法

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (21) : 209-215.

论文

航空发动机双转子系统的模态及其表达方法

王瑞1，廖明夫1，程荣辉2，丛佩红2，黄江博1

作者信息 +

Modal characteristics and their expression method for aeroengine dual-rotor system

WANG Rui1, LIAO Mingfu1, CHENG Ronghui2, CONG Peihong2, HUANG Jiangbo1

Author information +

文章历史 +

摘要

为解决双转子系统模态特征无法清晰表达，高、低压转子主激励的幅频特性在振动信号中不易识别的问题，以典型的发动机双转子系统为对象，建立有限元模型，分析双转子系统模态特性。基于进动分析理论，建立双转子系统正、反进动模态判断方法。建立了双转子自振频率和临界转速的“两面三维”表达方法，以及双转子不平衡响应的“三面三维”表达方法，并应用于双转子实验器。理论分析与实验结果表明：双转子自振频率和临界转速“两面三维”表达方法能将自振频率与高、低压转子转速和共同工作线清晰地关联在一起；双转子不平衡响应“三面三维”表达方法将双转子的振动与转速、转向和转速控制律清晰地描绘在一起，便于理解和分析转子的振动特性。本文的研究结果对于分析和表征双转子系统的动力学特性有重要的支撑作用。
关键词：航空发动机；双转子系统；进动分析；临界转速；“两面三维”； “三面三维”

Abstract

In order to solve the dual-rotor system modal characteristics that cannot be clearly expressed, high- and low-pressure rotor main incentives were difficult to identify in the vibration signal, the finite element model was established with a typical aero-engine dual-rotor system to analyze the modal characteristics of the dual-rotor system. Based on the theory of whirl analysis, the forward whirl modal and backward whirl modal judgment method of the dual-rotor system was established. The "2 plane 3 dimension" interpretation method of the dual-rotor self-vibration frequency and the critical speed was established. The "3 plane 3 dimension" interpretation method of the dual-rotor unbalanced response was established，which was applied to a dual-rotor test rig system. The results show that dual-rotor self-vibration frequency and critical speed "2 plane 3 dimension" interpretation method can clarify the self-vibration frequency, high and low pressure rotor speed, and common lines together; dual-rotor unbalance response "3 plane 3 dimension" interpretation method clearly depicts the vibration and speed, steering and common lines of the dual-rotor, which is convenient to understand and analyze the vibration characteristics of the rotor. The results of this paper have important support for the analysis and characterization of the kinetic properties of the dual-rotor system.
Key words: aero-engine; dual-rotor system; whirl analysis; critical speed; "2 plane 3 dimension"; "3 plane 3 dimension"

导出引用

王瑞1，廖明夫1，程荣辉2，丛佩红2，黄江博1. 航空发动机双转子系统的模态及其表达方法[J]. 振动与冲击, 2022, 41(21): 209-215

WANG Rui1, LIAO Mingfu1, CHENG Ronghui2, CONG Peihong2, HUANG Jiangbo1. Modal characteristics and their expression method for aeroengine dual-rotor system[J]. Journal of Vibration and Shock, 2022, 41(21): 209-215

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