噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2014年
6期
33-36
,共4页
田科技%孙首群%栾本言%曲兆晖
田科技%孫首群%欒本言%麯兆暉
전과기%손수군%란본언%곡조휘
振动与波%汽轮发电机%定子绕组端部%固有频率%有限元%加固结构
振動與波%汽輪髮電機%定子繞組耑部%固有頻率%有限元%加固結構
진동여파%기륜발전궤%정자요조단부%고유빈솔%유한원%가고결구
vibration and wave%turbo-generators%stator end winding%natural frequencies%finite element%fixed structures
结构振动问题在大型汽轮发电机中普遍存在，尤其定子端部绕组的振动问题最为突出。定子绕组端部的振动模态分析是减小端部振动的有效手段。利用三维有限元法模态分析，通过比较、分析发电机定子绕组端部振动系统的固有频率在不同模型结构和绕组安装工艺条件下的变化，总结出线棒的截面结构和加固结构对电机固有频率的影响规律。通过比较完整系统的模态分析计算结果和实测结果，证实了模态分析计算的有效性。分析结果对定子绕组端部结构设计和安装工艺有很大指导意义。
結構振動問題在大型汽輪髮電機中普遍存在，尤其定子耑部繞組的振動問題最為突齣。定子繞組耑部的振動模態分析是減小耑部振動的有效手段。利用三維有限元法模態分析，通過比較、分析髮電機定子繞組耑部振動繫統的固有頻率在不同模型結構和繞組安裝工藝條件下的變化，總結齣線棒的截麵結構和加固結構對電機固有頻率的影響規律。通過比較完整繫統的模態分析計算結果和實測結果，證實瞭模態分析計算的有效性。分析結果對定子繞組耑部結構設計和安裝工藝有很大指導意義。
결구진동문제재대형기륜발전궤중보편존재，우기정자단부요조적진동문제최위돌출。정자요조단부적진동모태분석시감소단부진동적유효수단。이용삼유유한원법모태분석，통과비교、분석발전궤정자요조단부진동계통적고유빈솔재불동모형결구화요조안장공예조건하적변화，총결출선봉적절면결구화가고결구대전궤고유빈솔적영향규률。통과비교완정계통적모태분석계산결과화실측결과，증실료모태분석계산적유효성。분석결과대정자요조단부결구설계화안장공예유흔대지도의의。
There usually exists the problem of structural vibration in large turbo-generators, especially the vibration of the stator end winding. In this paper, modal analysis of the stator end winding is done. Three-dimensional finite element model for the stator end winding system is established and its natural frequencies and the corresponding modals are obtained. Then, the natural frequencies of the system with different structure and winding assembly process are analyzed and compared. The influence of the cross-section of the winding bar and the reinforcement of the structure on the natural frequencies is summarized. The validity of modal analysis is proved by comparing the results of the modal analysis with the measured results of a complete structure. The research work is helpful for design and assembly of the stator end winding.
