Investigation on Energy Visualization of Cracked Bearing Block Based on Finite Element Power Flow

Abstract

本文提出基于有限元功率流的三维轴承座能量分布及传递特性的研究方法。首先介绍了有限元功率流的理论和相关表达式；然后以轴承座为研究对象，比较分析了简谐力作用下有无裂纹轴承座的能量分布和振动传递，实现了载荷冲击下有无裂纹轴承座的功率流可视化研究；最后讨论了裂纹对轴承座功率流的影响。应力云图、功率流云图和功率流矢量图分别用来呈现轴承座应力分布、能量分布和能量传递路径。结果表明简谐载荷下轴承座的应力集中区域和能量集中区域是不同，裂纹影响轴承座的应力分布、能量分布和能量传递，裂纹轴承座含有的能量更大。有限元功率流的可视化分析方法可为结构设计及安全运行提供依据。 The characteristics of energy distribution and transfer in three dimensional bearing block were investigated by finite element power flow technique. Firstly, the calculation process of power flow introduced. The energy distribution and vibration transmission of the bearing block with or without cracks under the action of the harmonic force are compared and analyzed, and the visualization of the power flow of the bearing housings is realized. Finally, the influence of the crack on the power flow of the bearing block is discussed. The stress distribution, energy distribution and energy transfer path are shown by stress nephogram, power flow nephogram and power flow vector diagram, respectively. The results show that the stress and energy distribution is different, the crack impact stress distribution, energy distribution and energy transfer of the bearing housing. The visual analysis method of power flow of finite element can provide the basis for structural design and safe operation.