发动机整机复杂传递和随机噪声影响下的转子等效不平衡量逆推方法26-33395

毕文豪; 江志农; 冯坤; 李想; 左彦飞

doi:10.7527/S1000-6893.2026.33544

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DOI: https://doi.org/10.7527/S1000-6893.2026.33544

发动机整机复杂传递和随机噪声影响下的转子等效不平衡量逆推方法26-33395

毕文豪 ,
江志农 ,
冯坤 ,
李想 ,
左彦飞

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北京化工大学

收稿日期: 2026-03-06

修回日期: 2026-05-20

网络出版日期: 2026-05-25

基金资助

国家自然科学基金青年科学基金资助项目;中央高校基本科研业务费项目

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A reverse method of rotor equivalent unbalance under the influence of complex transmission and random noise of the whole engine26-33395

BI Wen-Hao ,
JIANG Zhi-Nong ,
FENG Kun ,
LI Xiang ,
ZUO Yan-Fei

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Received date: 2026-03-06

Revised date: 2026-05-20

Online published: 2026-05-25

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摘要

航空燃气涡轮发动机装试过程中的整机动平衡可以提高动平衡效率，然而，复杂传递特性和多源激励使得机匣测点振动响应易出现显著的随机性，降低不平衡量逆推的准确性。为此，提出一种基于机匣测点响应，考虑复杂传递特性和随机噪声的发动机转子等效不平衡量逆推方法。通过整机动力学分析获得高压转子不平衡激励到轴承位置及机匣测点响应的传递特性；根据实测响应的概率分布，通过在确定性的仿真计算响应中叠加实测数据底噪及随基频响应变化的比例噪声生成具有不确定性的不平衡响应。然后对仿真与实测响应的幅频特性进行匹配，并对逆推转速进行选择。在此基础上，提出考虑不确定性响应和转速优选的逆推方法，实现具有概率分布的不平衡量逆推。仿真验证结果表明，使用所提方法进行逆推可以减小响应随机性导致的逆推结果偏差，提高逆推的准确性和稳定性；进一步利用实测数据验证，基于逆推所得等效不平衡量计算的响应相对原始响应的差异率与未使用该方法的结果相比显著减小，验证了所提方法的工程应用潜力。

关键词： 随机噪声干扰; 响应不确定性; 转子不平衡; 转速选择; 概率统计

本文引用格式

毕文豪 , 江志农 , 冯坤 , 李想 , 左彦飞 . 发动机整机复杂传递和随机噪声影响下的转子等效不平衡量逆推方法26-33395[J]. 航空学报, 0 : 1 -0 . DOI: 10.7527/S1000-6893.2026.33544

Abstract

Whole engine dynamic balance during the assembly and trial run of aero gas turbine engine can improve the efficiency of dynamic balance. However, the complex transmission characteristics and multi-source excitations tend to induce significant randomness in the vibration responses of casing measuring points, which reduces the accuracy of the unbalance reversion. Therefore, a reverse method of equivalent unbalance of engine rotor based on the response of casing measuring points and considering complex transmission characteristics and random noise is proposed. Through the dynamic analysis of the whole engine, the transmission characteristics of the high-rotor unbalance excitation to the bearing position and the casing measuring point response are obtained. According to the probability distribution of the measured response, the unbalanced response with uncertainty is generated by superimposing the background noise of measured data and proportional noise varying with the fundamental frequency responses in the deterministic simulation response. Then, the response amplitude-frequency characteristics of the simulation and the actual measurements are matched, and the rotational speeds for unbalance reversion are selected. On this basis, A reverse method considering uncertain response and speed optimization is proposed to realize the reverse of unbalance with probability distribution. The simulation results show that the proposed method can suppress the deviation of the reversion results caused by the randomness of the response and improve the accuracy and stability of the reversion. Furthermore, the measured data are adopted for verification. The difference rate between the reversed response based on the equivalent unbalance obtained by the reverse method and the original response is significantly reduced compared with those obtained without this method, which verifies the engineering application potential of the proposed method.

Key words： random noise interference; response uncertainty; rotor unbalance; speed selection; probability and statistics

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