A Reduced-Order Model for the Vibration Analysis of Mistuned Blade-Disc-Shaft Assembly

被引:5
|
作者
Wang, Shuai [1 ]
Bi, Chuan-Xing [1 ]
Zheng, Chang-Jun [1 ]
机构
[1] Hefei Univ Technol, Sch Mech Engn, Inst Sound & Vibrat Res, Hefei 230009, Anhui, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2019年 / 9卷 / 22期
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
reduced order model; mistuned blade-disc-shaft assembly; rotordynamic effects; BENDING VIBRATIONS; DYNAMIC-MODEL; SYSTEM; REDUCTION; IMPELLERS; ROTORS;
D O I
10.3390/app9224762
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An effective reduced-order model is presented in this paper for the vibration analysis of a mistuned blade-disc-shaft assembly considering the flexibility of the shaft and the rotordynamic effects. For the sake of accurate modeling and quantitative analysis, three-dimensional (3D) finite element models were employed in obtaining the governing equations of motion with the Coriolis force, centrifugal stiffening, and spin softening effects taken into account. Then, an efficient model order reduction technique based on the coordinate projection by normal modes of tuned assembly and cyclic symmetry analysis was developed for mistuned blade-disc-shaft assembly. The criterion of whether one matrix could be incorporated in cyclic symmetry analysis is presented. During the modeling, the mistuning in blade and disc was taken into account and dealt with independently. In mistuning projection, the blade and disc parts were both projected onto their tuned counterparts of the sector model, where the boundary conditions were set to be fixed and free, respectively. Finally, an example of a blade-disc-shaft assembly was employed to validate the effectiveness of the presented method in free and forced vibration analysis.
引用
收藏
页数:19
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