【摘要】 变压器铁心的振动将会严重影响其生产质量和使用寿命,针对铁心的振动问题,提出了一种在铁心相邻过渡层之间加入弹性阻尼夹层的方法。采用有限元方法对加入阻尼夹层前后的铁心进行模态分析和谐响应分析,探讨了在加入阻尼夹层前后铁心在不同频率激振力下的振动情况,并利用阻尼夹层实验进行验证。仿真和实验结果均表明,加入阻尼夹层后能有效地降低由于硅钢片磁致伸缩所产生的铁心弯曲振动问题,同时增加阻尼夹层的厚度和层数使得铁心减振效果更明显,这对于指导企业生产低振动的铁心具有参考意义。更多还原

【Abstract】 The vibration of transformer core seriously affects its production quality and service life. Here, aiming at the core vibration problem, a method to add elastic damping interlayer between adjacent transition layers of core was proposed. The finite element method was used to do modal analysis and harmonic response analysis of the core before and after adding damping interlayer, respectively. Vibrations of the core under excitation forces with different frequencies before and after adding damping interlayer were simulated numerically and verified with tests adding damping interlayer. Simulation and test results showed that adding damping interlayer can effectively reduce bending vibration of iron core caused by magnetostriction of silicon steel sheets; increasing thickness and layer number of damping interlayer can make the core vibration reduction effect more obvious; the study results provide a reference for guiding enterprises to produce iron cores with lower vibration.更多还原