船用高速发电机基波磁场下机座电磁振动

发布时间：2018-06-03 05:07

  本文选题：电磁振动 + 基波磁场　； 参考：《振动与冲击》2016年02期

【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]:The electromagnetic vibration characteristics of marine high speed synchronous generator are analyzed. A finite element method is used to calculate the vertical vibration acceleration of the radial electromagnetic force wave caused by the air-gap magnetic field of the fundamental wave of the motor at the base of the machine. By comparing the vibration simulation of different mounting modes, material stiffness and structural damping, the main factors affecting vibration acceleration and the effect of simplified finite element model on the calculation results are analyzed. Three dimensional harmonic field and transient field finite element method were used to measure the vibration acceleration of the computer foot, and the motor operation method was used to measure the vibration acceleration of the engine foot. The results show that the simulation results are in good agreement with the test results. The vibration of the base and foot is greatly affected by the mounting mode of the base, and the amplitude of the stator is more responsive to the elastic modulus of the material. The deformation distribution of the base is mainly affected by the structural damping under the elastic installation / free state. The results can be used as a reference for the design of vibration and noise reduction of marine high speed motor.
【作者单位】： 海军工程大学舰船综合电力技术国防科技重点实验室;
【基金】：国家自然科学重点基础研究发展计划973项目(2013CB035601) 国家自然科学基金资助项目(51137005;51222705)
【分类号】：U665.1
，

本文编号：1971583