黄土介质微波加热机理及效果研究  

Microwave Heating Mechanism and Effect in Loess Dielectric

作　　者：李建星 王健合 吴思凡 王志丰[2] 陈娟[1] LI Jianxing;WANG Jianhe;WU Sifan;WANG Zhifeng;CHEN Juan(School of Information and Communications Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Highway,Chang’an University,Xi’an 710018,China)

机构地区：[1]西安交通大学信息与通信工程学院,西安710049 [2]长安大学公路学院,西安710018

出　　处：《现代应用物理》2024年第1期133-138,共6页Modern Applied Physics

基　　金：国家重点研发计划资助项目(2020YFA0709800)。

摘　　要：针对土木工程领域软弱黄土地基热固结效果的问题,基于COMSOL Multiphysics分别建立了电阻式热传导、理想微波辐射、实际天线辐射的黄土加热模型,对加热速率和范围进行了仿真和分析,并探讨了不同微波频率对加热效果的影响。结果表明:微波加热效果优于电阻式热传导,而对于实际天线,由于热传导和微波加热两种机制共同作用,加热效果最佳。此外,通过对工作频率进行分析研究,得出微波加热效果随频率增大不断恶化的特性。在实际工程中,应用天线辐射对黄土地基进行热加固处理,可以提升加热效率,确保黄土地基稳定性。In this paper,the thermal consolidation in collapsible loess foundations in the field of civil engineering is addressed.Three different models,namely,resistive heating,microwave radiation,and antenna radiation,are developed using COMSOL Multiphysics.The heating speed and range are simulated and analyzed for each model,and the influence of different microwave frequencies on the heating model is mechanistically analyzed.The research results show that microwave heating outperforms resistive heating,and the antenna radiation provides the most optimal heating effect due to the combined action of both heating methods.Furthermore,by analyzing the operating frequency,it is found that the microwave heating effect deteriorates continuously with increasing frequency.In practical engineering applications,utilizing antenna radiation for thermal consolidation of collapsible loess foundations can enhance heating efficiency and ensure the safety of superstructures.

关 键 词：微波加热 微波烧结 黄土地基 电磁热耦合 多物理场仿真 

分 类 号：TN99[电子电信—信号与信息处理] O451[电子电信—信息与通信工程]