失谐整体叶盘的改进子结构建模方法

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (12) : 299-308.

论文

失谐整体叶盘的改进子结构建模方法

贾子初，梁道森，曹芝腑，姚建尧

作者信息 +

An improved substructure modeling method for mistuned blisk

JIA Zichu, LIANG Daosen, CAO Zhifu, YAO Jianyao

Author information +

文章历史 +

摘要

针对复杂失谐叶盘结构振动分析中的计算效率问题，提出一种改进的子结构建模及分析方法。根据整体叶盘结构的几何特征，将其划分为轮盘及叶片子结构。然后，对叶片-轮盘交界面均匀选取减缩自由度;通过转换矩阵将减缩自由度转换为子结构的内部自由度。最后，使用子结构模态综合法完成减缩自由度的凝聚，建立整体叶盘结构的减缩模型。以某型整体叶盘为例，利用改进的子结构分析模型，在典型危险工况下评估了结构的失谐水平。研究结果表明该方法在确保计算精度的前提下能够高效求解随机失谐整体叶盘的振动响应。

Abstract

An improved substructure modeling and analysis method is proposed to reduce the computational cost in vibration analysis of a complex mistuned blisk. The blisk is divided into blade substructures and a disk substructure according to the geometric feature. Then, the reduced interfacial degrees of freedom are evenly selected and transformed into internal degrees of freedom of substructure by the coordinate transformation matrix. Finally, the substructure method is used to condense the internal degrees of freedom of the substructure and the interface, and the reduction model of the blisk is established. The mistuning level of the blisk was evaluated under typical hazardous excitation cases by using the improved substructure analysis model. The results show that this proposed method can efficiently analyze the dynamic response of the mistuned blisk while ensuring computational accuracy.

导出引用

贾子初，梁道森，曹芝腑，姚建尧. 失谐整体叶盘的改进子结构建模方法[J]. 振动与冲击, 2023, 42(12): 299-308

JIA Zichu, LIANG Daosen, CAO Zhifu, YAO Jianyao. An improved substructure modeling method for mistuned blisk[J]. Journal of Vibration and Shock, 2023, 42(12): 299-308

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