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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。
Aiming at the problem that the single-layer porous asphalt pavement is easy to block, a double-layer porous asphalt pavement structure is proposed. The finite element method is used to solve the problem of single-layer porous asphalt pavement with acoustic-solid coupling model of air medium and sound absorption structure. The acoustic performance of asphalt pavement acoustic structure was numerically simulated. The combination of void ratio and thickness reduction of double-layer porous asphalt pavement was analyzed, and the appropriate structural parameters of double-layer porous asphalt pavement were calculated. The results show that the sound absorption effect of double-layer porous asphalt pavement structure is better when the upper layer porosity is 10%, the lower layer porosity is 25%, the upper layer thickness is 2 cm and the lower layer thickness is 4 cm. Conclusion can provide theoretical basis for the application of double-layer porous asphalt pavement.