多物理场下超薄吸波磨耗层微波加热性能研究  

Microwave heating performance of ultra-thin microwave absorbing wear layer based on multi-physical field

作　　者：彭东黎[1] 张细和 丁俊剑 刘小明[4] 刘旭 PENG Dongli;ZHANG Xihe;DING Junjian;LIU Xiaoming;LIU Xu(Institute of Road and Bridge Engineering,Hunan Communication Polytechnic,Changsha 410132,China;Power Construction Corporation of China Guiyang Engineering Corporation Limited,Guiyang 550081,China;Hunan Tonghe Engineering Co.,Ltd.,Changsha 410121,China;School of Civil Engineering,Central South University,Changsha 410075,China;Hunan Litan Expressway Construction and Development Co.,Ltd.,Zhuzhou 412000,China)

机构地区：[1]湖南交通职业技术学院路桥工程学院,湖南长沙410132 [2]中国电建集团贵阳勘测设计院有限公司,贵州贵阳550081 [3]湖南省通和工程有限公司,湖南长沙410121 [4]中南大学土木工程学院,湖南长沙410075 [5]湖南省醴潭高速公路建设开发有限公司,湖南株洲412000

出　　处：《铁道科学与工程学报》2024年第2期648-658,共11页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(52078499);湖南省自然科学基金资助项目(2022JJ30730);湖南省交通科技项目(202246)。

摘　　要：微波加热技术在沥青路面除冰中的应用得到了广泛的关注,然而目前多对沥青路面整体进行微波加热增强,从而导致路表加热效率提升缓慢。为了进一步提高沥青路面路表的微波加热性能,采用碳化硅(SiC)微波增强集料制备了一种超薄吸波磨耗层,通过微波加热以及除冰试验分析了超薄吸波磨耗层的微波加热性能以及加热耐久性,确定了超薄吸波磨耗层的最佳厚度。并采用COMSOL Multiphysics有限元软件建立了多物理场沥青混凝土微波加热模型,分析了超薄吸波磨耗层的设置对微波加热过程中电磁场的强度与分布以及温度场的影响。研究结果表明:在2.45 GHz频率的微波加热下,超薄吸波磨耗层具有良好的微波加热性能,10 mm厚的超薄吸波磨耗层的微波加热效率相比于普通沥青混合料以及整体微波增强的沥青混合料提高了4.47倍和1.40倍。SiC稳定的微波吸收性能保证了超薄吸波磨耗层具有良好的微波除冰耐久性,在经过反复的微波加热除冰后超薄吸波磨耗层的除冰时间仍然可以保持在45 s左右。数值仿真模拟结果表明超薄吸波磨耗层较强的微波吸收能力可以局部增强试件表层的电磁场强度,从而使更高的温度分布在试件表层。超薄吸波磨耗层内部的电场强度和磁场强度分别比普通沥青混合料试件提高了50.9%和15.7%。综上可知,超薄吸波磨耗层的设置可以提高沥青路面表面的微波加热性能。The application of microwave heating technology in asphalt concrete pavement deicing has attracted much attention.However,the current approach often involves enhancing the entire asphalt pavement with microwave heating,leading to poor heating efficiency of the road surface.An ultra-thin microwave absorbing wear layer was prepared using silicon carbide(SiC)microwave enhanced aggregate to improve the microwave heating efficiency of road surface.The microwave heating efficiency and heating durability of ultra-thin microwave absorbing wear layer were investigated by microwave heating and deicing tests,and the optimum thickness of ultra-thin microwave absorbing wear layer was determined.The muti-physics microwave heating model established by COMSOL Multiphysics was used to analyze the influence of ultra-thin microwave absorbing wear layer on the intensity and distribution of electromagnetic field and temperature field during microwave heating.The results show that the ultra-thin microwave absorbing wear layer exhibits excellent microwave heating performance at a frequency of 2.45 GHz.The 10mm ultra-thin microwave absorbing wear layer has better microwave heating performance,and its temperature rate was 4.47 times and 1.40 times higher than that of the ordinary asphalt mixture and overall microwave-enhanced asphalt mixture.The stable microwave absorption property of SiC ensured that ultra-thin microwave absorbing wear layer had better microwave deicing durability,and the deicing time of ultra-thin microwave absorbing wear layer could still be maintained for about 45 s after repeated microwave heating.The numerical simulation results show that the strong microwave absorption capacity of the ultra-thin absorbing wear layer could partly enhance the electromagnetic field strength of the surface layer of the specimen,leading higher temperature on the surface of the specimen.The electric field intensity and magnetic field intensity inside the ultra-thin wave-absorbing wear layer increased by 50.9%and 15.7%,respectively,compa

关 键 词：沥青混凝土 微波加热 超薄吸波磨耗层 温升速率 多物理场 

分 类 号：TU418[建筑科学—岩土工程]