| 王树慧1，2 ，王维民 1，2 ，李天晴 2 ，张娅1.航空发动机叶片外物打击事件评估方法[J].航空发动机,2025,51(6):120-126 |
| 航空发动机叶片外物打击事件评估方法 |
| Research on the Evaluation Method of Aeroengine Blade Foreign Object Impact Events |
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| DOI： |
| 中文关键词: 外物打击 旋转叶片 振动响应 回溯 叶尖计时 航空发动机 |
| 英文关键词:foreign object impact rotating blades vibration response backtracking blade tip timing aeroengine |
| 基金项目:国家自然科学基金重点项目（92160203）资助 |
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| 摘要点击次数: 2025 |
| 全文下载次数: 407 |
| 中文摘要: |
| 外物打击是影响航空发动机旋转叶片运行状态的重要事件，准确识别外物打击造成的叶片振动及变形可为叶片的损伤
评价提供依据。针对叶尖计时信号严重欠采样，难以直接捕获叶片遭受外物打击时刻的最大位移参数，导致对打击事件严重程度
的判定不准确的问题，提出了一种基于叶尖计时的外物打击叶片位移响应回溯方法。建立了一种考虑叶片失谐、叶片安装间距误
差及叶片同步振动的外物打击响应模型，模拟了叶尖计时采样得到的外物打击事件时叶片位移响应，对仿真所得数据进行了回
溯，并最终利用高速模拟试验台进行多转速工况下的冰块打击试验验证。结果表明：该方法回溯的叶片最大振幅与真实振幅误差
小于1.2%，回溯所得数据与试验所测数据相位基本重合，二者相关系数不低于0.9657，表明该回溯算法具有良好的工程应用价值。 |
| 英文摘要: |
| Foreign object impact is a critical event affecting the operating state of aero-engine rotating blades.Accurate identification
of the resulting blade vibration and deformation provides a basis for blade damage assessment.To address the difficulty in capturing the
maximum blade displacement under foreign object impact due to severe undersampling in blade tip timing(BTT),a displacement backtrack?
ing method based on BTT was proposed.An impact response model considering blade detuning,installation spacing error,and synchronous
vibration was established. Blade displacement response obtained by the BTT during the impact was simulated,and the simulation data was
backtracked. Validation was conducted through ice impact tests under multi-speed operating conditions on a high-speed simulation test
rig.Results show that the error between the backtracked and actual maximum amplitude is below 1.2%,and the phase of the backtracked
data matches experimental measurements with a correlation coefficient no less than 0.9657,demonstrating the engineering applicability of
the method. |
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