船用高速发电机基波磁场下机座电磁振动

张贤彪,王 东,顾太平,刘德志

振动与冲击 ›› 2016, Vol. 35 ›› Issue (2) : 195-200.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (2) : 195-200.
论文

船用高速发电机基波磁场下机座电磁振动

  • 张贤彪,王  东,顾太平,刘德志
作者信息 +

Electromagnetic vibration characteristics of marine high-speed generator frame derived by fundamental magnetic field

  • ZHANG Xian-biao,WANG Dong,GU Tai-ping,LIU De-zhi
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文章历史 +

摘要

以船用高速同步发电机为对象进行电磁振动特性分析。用有限元法计算空载下电机基波气隙磁场引起的径向电磁力波在机座机脚处垂向振动加速度。通过对不同机座安装方式、材料刚度及结构阻尼的振动仿真对比,分析影响振动加速度主因及有限元模型简化处理对计算结果影响。用三维谐波场及瞬态场有限元法计算机脚振动加速度,用电动机运行法测试发电机空载下机座机脚振动加速度。结果表明,仿真与试验结果基本一致,机座及机脚振动受机座安装方式影响较大,定子振幅受材料弹性模量响应较大,在弹性安装/自由状态下机座形变分布主要受结构阻尼影响。该结果可为船用高速电机减振降噪设计、研究提供依据及参考。

Abstract

With the increase of speed and power-density, the vibration problem of marine high-speed generator has become much more severe. Aiming at this problem, the vertical vibration acceleration at the machine feet of a marine high-speed synchronous generator is studied by finite element method (FEM), which is derived fromradial electromagnetic pull due tofundamental air-gap magnetic fieldwithout load. Theanalysis of vibration characteristicsis conducted under different installations of frame, material stiffness and structural damping. The main influence factors are classified clearly by comparative analysis. Moreover, the simplification of finite element model is introduced. At last, vibration acceleration at the machine feet is calculated by three dimensional harmonic fieldFEM and transient field FEM respectively. The tested vertical vibration acceleration atmachine feet of marine high-speed synchronous generator running as motor without load is presented. The simulation results are compared with test results, where a substantial agreement is achieved. The results show that frame and feet’s vibrations are impacted by installations greatly and the material stiffness is the main influence factor of stator’s vibrationamplitude. Moreover, the frame’s damping has a significant effect on the vibration amplitude distribution at free or flexible installation. The results can provide theoretical reference for marine high-speed generator vibration and noise reduction research.

关键词

电磁振动 / 基波磁场 / 船用发电机 / 有限元法

Key words

electromagnetic vibration / fundamental magnetic field / marine generator / finite element method

引用本文

导出引用
张贤彪,王 东,顾太平,刘德志. 船用高速发电机基波磁场下机座电磁振动[J]. 振动与冲击, 2016, 35(2): 195-200
ZHANG Xian-biao,WANG Dong,GU Tai-ping,LIU De-zhi. Electromagnetic vibration characteristics of marine high-speed generator frame derived by fundamental magnetic field[J]. Journal of Vibration and Shock, 2016, 35(2): 195-200

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