热力透平2026，Vol.55Issue(3)：208-212,258,6.DOI:10.13707/j.cnki.31-1922/th.2026.03.007
半开式叶轮模态敏感性分析和失谐识别
Modal Sensitivity Analysis and Mistuning Identification of Semi-Open Impeller
周亚锋 1张小龙 1李浦2
作者信息
- 1. 西安陕鼓动力股份有限公司,西安 710075
- 2. 西安交通大学 能源与动力工程学院,西安 710049
- 折叠
摘要
Abstract
Mistuning in turbomachinery bladed disks is highly prone to inducing high-cycle fatigue damage.Therefore,mistuning identification is of great significance for the safe and reliable operation of rotating components in turbomachinery.Although the added mass detuning modal measurement is a commonly used method for bladed disk mistuning identification,it fails to achieve absolute decoupling of bladed disk vibrations.In this study,an added mass detuning modal analysis was conducted on a semi-open impeller,and the quantitative coupling relationships of the bladed disk in different vibration modes were derived based on the strain energy distribution.Added mass detuning modal tests were performed to obtain the mistuning coefficients of the first four modes.Meanwhile,considering the uncertainty of the added mass,a sensitivity analysis of the modal frequency to the added mass was carried out.Based on this,an influence coefficient calculation method considering both the inherent mistuning of the blades and the added mass was proposed to evaluate the blade mistuning.The research findings provide an analytical method for bladed disk mistuning identification considering the uncertainty of added mass.关键词
半开式叶轮/敏感性分析/失谐识别/影响系数计算法/模态实验Key words
semi-open impeller/sensitivity analysis/mistuning identification/influence coefficient calculation method/modal experiment分类
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周亚锋,张小龙,李浦..半开式叶轮模态敏感性分析和失谐识别[J].热力透平,2026,55(3):208-212,258,6.
