大型汽轮发电机定子端部绕组模型动力特性修改的矩阵分解法

DYNAMIC MODIFICATION OF COIL END BASKET OF LARGE TURBO-GENERATOR'S STATOR USING MATRIX DECOMPOSITION METHOD

本文将大型汽轮发电机定子端部绕组简化成截顶圆锥壳与侧向支承板的组合结构。通过力学的等效原理,合理简化支承板的力学模型,引入结构动力修改概念分析支承板对结构的影响程度,采用矩阵分解技巧处理最终的计算模型,以提高计算效率。

The stator coil end basket of a large turbo-genertor is simplified into composite model formed by a truncated circular conical shell and periodically spaced supporting beams. The equivalence mechanics law is used to process the supporting beams model and the concept of structural dynamic modification is introduced to analyse the influence of supporting beams on the stator coil end basket.The matrix decomposition method is used for computational efficiency.