双层多孔隙沥青路面吸音降噪有限元分析  

Finite element analysis for noise-reducing of double-layer porous asphalt pavement

作　　者：王宏畅[1] 黄晓明[2] 廖公云[2] 薛国强[2] 

机构地区：[1]南京林业大学土木工程学院,南京210037 [2]东南大学交通学院,南京210096

出　　处：《环境工程学报》2011年第12期2910-2914,共5页Chinese Journal of Environmental Engineering

基　　金：江苏省自然科学基金(BK2010568);江苏省高校自然科学研究项目(09KJB580003)

摘　　要：针对单层多孔隙沥青路面容易阻塞的问题,提出双层多孔隙沥青路面结构形式,采用有限元的方法,应用空气介质和吸声结构的声-固耦合模型,通过大型商用软件ABAQUS对多孔隙沥青路面吸声结构的吸声性能进行数值仿真模拟,分析了双层多孔隙沥青路面中空隙率组合以及厚度组合下的降噪特性,据此提出适宜的双层多孔隙沥青路面结构参数,计算结果表明双层多孔隙沥青路面结构,当上层空隙率为10%,下层空隙率为25%,上层厚度为2 cm,下层厚度为4 cm时,吸声效果较好。结论可为双层多孔隙沥青路面的应用提供理论基础。For single-layer porous asphalt pavement easy blocking, double-layer porous asphalt pavement structure was brought out. The numerical simulation for acoustic absorption properties of porous asphalt pavement structure was made with application of finite element method and acoustic-solid coupling model by large-scale commercial software ABAQUS. The noise-reducing feature was analyzed for the double-layer porous asphalt pave- ment in porosity and thickness combinations and then structural parameters suitable for double-layer porous pave- ment was proposed. The result indicated that double-layer porous asphalt pavement has better sound absorption for upper and lower-layer porosity of 10% , 25% , the upper and lower-layer thickness of 2 cm, 4 cm. The con- clusion can provide a theoretical basis for the application of double-layer porous asphalt pavement.

关 键 词：道路工程 沥青路面 多孔隙 双层 降噪 有限元 

分 类 号：U416.2[交通运输工程—道路与铁道工程]