摘要
基于三维有限元法,以某半速核电机组为原型,比较分析了轴承座真实支撑动刚度（轴瓦底部）与轴承座上盖法兰面动刚度的比例关系。有限元计算结果表明：在0~25 Hz内,轴承座真实支撑动刚度与轴承座上盖法兰面动刚度存在简单比例关系,可以由上盖法兰面的动刚度实测值推算轴承座的真实支撑刚度。
Based on 3D finite element method and taking the half-speed nuclear power unit as a prototype, the relationship was analyzed between real dynamic stiffness of bearing pedestal （at bushing bottom） and the dynamic stiffness of top head flange. FEA results show that within 0-25 Hz, there is a simple proportional relationship between above two kinds of dynamic stiffness, therefore the real dynamic stiffness of bearing pedestal can be deduced according to actual measurements of the top head flange.
出处
《发电设备》
2015年第5期316-319,共4页
Power Equipment
基金
国家科技重大专项专题(2012ZX06002-017-01-04)
关键词
汽轮发电机组
落地式轴承座
动刚度
谐响应
turbo-generator set
floor bearing pedestals dynamic stiffness
harmonic response
