BLISK WITH SMALL GEOMETRY MISTUNING AND BLEND REPAIR: AS-MEASURED FE MODEL AND EXPERIMENTAL VERIFICATION

被引:0
|
作者
Zhou, Biao [1 ]
Zhao, Jingchao [1 ]
Ye, Nan [2 ]
Berruti, Teresa M. [3 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Peoples R China
[3] Politecn Torino, Dipartimento Ingn Meccan & Aerosp, I-10129 Turin, Italy
来源
PROCEEDINGS OF ASME TURBO EXPO 2022: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, GT2022, VOL 8B | 2022年
基金
中国国家自然科学基金;
关键词
D O I
暂无
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This paper presents an 'As-Measured Model' of a blended blisk, built upon the measurement of the true geometry of the blisk by the 3D optical scanning technology. This high-fidelity model aims to account for the variances of blade frequencies and mode shapes within the real blisk in the presence of both the blend repair and inherent geometry mistuning due to manufacturing, etc. An improved mesh updating strategy is proposed to adapt a seed blisk finite element model to the measured geometry. The resultant 'as-measured model' is therefore able to accurately represent the measured blade-to-blade geometry variances. The classical blade detuning test in combination with a novel 'correction' procedure is employed to experimentally evaluate the 'blade-alone' frequency mistuning pattern in the real blisk. Experimental verification of the 'as-measured model' demonstrates that it is able to not only capture the 'blade-alone' frequency and mode shape variations due to both the blend and intrinsic blade geometry variances, but also to reproduce the global dynamics of the blended blisk with acceptable accuracy.
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页数:13
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