沈阳航空航天大学学报2026，Vol.43Issue(4)：80-87,8.DOI:10.3969/j.issn.2095-1248.2026.04.009
燃气涡轮叶片高温蠕变致振机理与控制优化
Mechanism and control optimization of vibration induced by high-temperature creep in gas turbine blades
摘要
Abstract
To reveal the root cause of the sudden vibration-exceedance fault during the 150h endurance test of a certain type of turboshaft engine,the physicochemical inspection was combined with thermal-mechanical coupling simulation to carry out a full-chain mechanism analysis.The results show that severe transient thermal shocks induced by the anti-icing system's intervention cause typical γ ′-phase rafting degradation and accelerated creep elongation in DZ22 alloy blades.This excessive radial growth then triggered intense rotor-stator rubbing,generating an unbalance exceeding 60 g·cm and ultimately causing a sudden rotor vibration exceedance.Larson-Miller model calculations confirm that the extreme thermal load drastically reduces the local creep life from 150 h to approximately 80.5 h,precisely matching the actual removal timing and location.Based on these findings,a sequential control strategy of"reduce operating condition first,then activate anti-icing"was developed.Bench test results demonstrate that this strategy completely suppresses thermal overshoot at the source,eliminates the risk of rotor rubbing,and successfully ensures the safety of subsequent endurance tests for the same engine type.关键词
涡轴发动机/振动超限/失效分析/高温蠕变/不控制优化Key words
turboshaft engine/vibration exceedance/failure analysis/high-temperature creep/control optimization分类
能源科技引用本文复制引用
孙伟,李建华,张凤玲,姚玉东..燃气涡轮叶片高温蠕变致振机理与控制优化[J].沈阳航空航天大学学报,2026,43(4):80-87,8.基金项目
辽宁省国际科技合作计划项目(项目编号:2025JH2/101900009). （项目编号:2025JH2/101900009）
