TE103单模微波谐振腔的有限元数值模拟

采用有限元分析法,推导了TE103单模谐振腔有限元数值模拟的数学模型。运用ANSYS软件进行数值模拟,分析和讨论了微波加热柱状WC-Co时谐振腔和介质内电场分布云图。数值模拟结果表明,空腔有3个大小相近的电场均匀区域,加载柱状WC-Co样品后,由于样品的吸波特性,3个电场均匀区域都有不同程度的缩小,两边的区域明显缩小,中间区域缩小相对不明显,这样就形成了中间电场均匀区域大,两边小的电场分布情况。样品的电场分布为从里到外成梯度的逐渐增强,样品的电场分布不均匀,造成了微波加热不均匀,很好地解释了微波加热WC-Co时容易出现样品开裂的现象。数值模拟结果与实验结果吻合很好。

Finite Element Method Numerical Simulation of TE103 Single Mode Microwave Resonance Cavity

A mathematical model was deduced to describe the element method(FEM) simulation of TE103 single mode microwave resonance cavity.The contour electric field distribution in the microwave resonance cavity and WC-Co when heating it was analyzed and discussed with the ANSYS software.The numerical simulation results show that there are three even electric field regions with the same size in the rectangle microwave resonance cavity without load.These regions will become smaller and the middle region doesn't become smaller conspicuously,while the others are the other way round after putting in cylindrical WC-Co sample.The electric field in the sample becomes bigger gradually from inner to exterior.The contour electric field distribution is uneven,which is the cause of uneven heating that easily contribute to the sample cracking.The simulation result is in accordance with the experimental result.