噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
2期
41-43,136
,共4页
振动与波%汽轮发电机%定子绕组端部%有限元%模态分析
振動與波%汽輪髮電機%定子繞組耑部%有限元%模態分析
진동여파%기륜발전궤%정자요조단부%유한원%모태분석
vibration and wave%turbo-generator%end winding%finite element%modal analysis
大型汽轮发电机运行时会受到端部电磁力的作用，当电磁力的频率或者二倍工频与定子绕组端部的固有频率接近时，容易发生较大的振动，产生安全隐患，故需要对定子绕组端部振动情况进行研究。本文建立了定子端部准确的三维模型；为方便计算，对有限元模型进行了简化，进行了模态分析，获得了前两阶的振型；采用试验法进行模态测试，并将仿真计算结果与试验结果进行对比，并进行了误差分析，二者误差在合理范围内，从而验证了本文仿真的合理性，为汽轮发电机的设计和安全运行提供依据。
大型汽輪髮電機運行時會受到耑部電磁力的作用，噹電磁力的頻率或者二倍工頻與定子繞組耑部的固有頻率接近時，容易髮生較大的振動，產生安全隱患，故需要對定子繞組耑部振動情況進行研究。本文建立瞭定子耑部準確的三維模型；為方便計算，對有限元模型進行瞭簡化，進行瞭模態分析，穫得瞭前兩階的振型；採用試驗法進行模態測試，併將倣真計算結果與試驗結果進行對比，併進行瞭誤差分析，二者誤差在閤理範圍內，從而驗證瞭本文倣真的閤理性，為汽輪髮電機的設計和安全運行提供依據。
대형기륜발전궤운행시회수도단부전자력적작용，당전자력적빈솔혹자이배공빈여정자요조단부적고유빈솔접근시，용역발생교대적진동，산생안전은환，고수요대정자요조단부진동정황진행연구。본문건립료정자단부준학적삼유모형；위방편계산，대유한원모형진행료간화，진행료모태분석，획득료전량계적진형；채용시험법진행모태측시，병장방진계산결과여시험결과진행대비，병진행료오차분석，이자오차재합리범위내，종이험증료본문방진적합이성，위기륜발전궤적설계화안전운행제공의거。
Large turbo-generators may suffer electromagnetic forces from the winding ends. When the frequency of the electromagnetic force or twice of operation frequency is close to the inherent frequency of the stator’s end, large vibration will occur which can cause potential risk. So, study on the end winding vibration of the large turbo-generator is important. In this pa-per, a 3D finite element model of the simplified end winding was established. The modal analysis was done and the first two or-der vibration modes were obtained. Then, the modals of the end winding were tested, and the result was compared with that of the simulation. Their difference was found to be allowable. The correctness of this simulation was verified. This work may pro-vide a basis for design and safe operation of turbo-generators.
