大型汽轮发电机定子端部绕组的数字化建模及振动特性分析

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (7) : 143-153.

论文

王頲1，2，王惠3，赵洋3，4，李星虹3

作者信息 +

Digital mechanism modeling and vibration characteristic analysis for stator end winding of large turbo-generator

WANG Ting1,2, WANG Hui3, ZHAO Yang3,4, LI Xinghong3

Author information +

文章历史 +

摘要

以600MW大型汽轮发电机为研究对象。首先，建立了汽轮发电机定子端部绕组的高精度有限元模型并进行模态分析，得到与实测结果吻合较好的模态参数；然后，对定子端部绕组进行数字化机理建模，将双层绕组结构视为壳体，内外层支撑结构作为环肋与筋条，基于离散单元法可将端部绕组等效为叠层加筋加肋圆锥壳模型。借助适用于各种复杂弹性边界条件的改进傅里叶级数的瑞利-里兹法，建立了端部绕组的固有、受迫振动方程。通过计算得到端部绕组模态参数的解析解，并与有限元仿真结果进行对比，验证了所建立等效数字化机理模型的合理性与正确性，可为后续端部绕组电磁振动的研究打下基础。

Abstract

A high-precise finite element model of a 600MW large turbo-generator stator end winding is established. The modal parameters are obtained by modal analysis, which are in good agreement with the experimental data. Then, the digital mechanism model of stator end winding is set up. In the model, the shell is used to model double-layer winding and the supporting structures are treated as ring stiffeners and stringer stiffeners. Based on the discrete element method, the equivalent model of stiffened and ribbed conical shell for end winding can be established. After that, the natural and forced vibration equations of the end winding are established by Rayleigh- Ritz method with improved Fourier series which is suitable for different complex elastic boundary conditions. With the digital mechanism model, the modal parameters of end winding are determined. Comparing with the simulation results obtained by the finite element model, the rationality and correctness of the proposed digital mechanism model are verified.

导出引用

王頲1，2，王惠3，赵洋3，4，李星虹3. 大型汽轮发电机定子端部绕组的数字化建模及振动特性分析[J]. 振动与冲击, 2023, 42(7): 143-153

WANG Ting1,2, WANG Hui3, ZHAO Yang3,4, LI Xinghong3. Digital mechanism modeling and vibration characteristic analysis for stator end winding of large turbo-generator[J]. Journal of Vibration and Shock, 2023, 42(7): 143-153

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