The paving segregation of asphalt mixture was closely related to the structure size and using parameters for the screw distributor of paver,and the paving uniformity of the mixture was determined by the screw blade di...The paving segregation of asphalt mixture was closely related to the structure size and using parameters for the screw distributor of paver,and the paving uniformity of the mixture was determined by the screw blade diameter,pitch,and the position of the mixture in the screw distributor.Through researching the kinematics of the mixture in the screw distributor,the mathematical model was established,and the mathematical model was related with structural parameters,used parameters and material parameters.Through the mathematical model,the various parameters on the screw distributor job performance were analyzed,and the unstable area,meta-stable area and stable area were determined.In the project,the full-scale test in actual project was conducted by using the AC25 mixture.By changing the using parameters compare the paving operations,the results show that,the reasonable parameter will greatly improve the uniformity of paving,and the surface proportion of structural depth of mixture decrease from the 2.13 to 1.60.展开更多
针对沥青洒布车横向洒布不均匀现象,对喷嘴的结构参数进行优化,以改善沥青洒布过程中的雾化质量。基于正交试验原理设计以喷嘴半球直径、切槽深度、切槽角为优化参数,以索特尔平均直径D_(32)及分布均匀性指数N为雾化特性指标的仿真方案...针对沥青洒布车横向洒布不均匀现象,对喷嘴的结构参数进行优化,以改善沥青洒布过程中的雾化质量。基于正交试验原理设计以喷嘴半球直径、切槽深度、切槽角为优化参数,以索特尔平均直径D_(32)及分布均匀性指数N为雾化特性指标的仿真方案。将VOF(Volume of Fluid)方法与DPM(Discrete Phase Model)方法进行耦合,通过VOF-to-DPM方法对喷嘴的试验方案进行仿真分析,并结合响应面法建立回归模型,优化求解获得最佳参数组合。结果表明:喷嘴的半球直径、切槽深度、切槽角对雾化特性有显著影响,且半球直径与切槽角之间存在显著的交互作用;喷嘴优化后在雾化质量上有显著提升,D_(32)减小了25.26%,N增加了10.27%。展开更多
基金Funded by the Special Fund for Basic Scientific Research of Central Colleges,Chang'an University and Basic Research Support Program of Chang'an University(CHD2011SY005)
文摘The paving segregation of asphalt mixture was closely related to the structure size and using parameters for the screw distributor of paver,and the paving uniformity of the mixture was determined by the screw blade diameter,pitch,and the position of the mixture in the screw distributor.Through researching the kinematics of the mixture in the screw distributor,the mathematical model was established,and the mathematical model was related with structural parameters,used parameters and material parameters.Through the mathematical model,the various parameters on the screw distributor job performance were analyzed,and the unstable area,meta-stable area and stable area were determined.In the project,the full-scale test in actual project was conducted by using the AC25 mixture.By changing the using parameters compare the paving operations,the results show that,the reasonable parameter will greatly improve the uniformity of paving,and the surface proportion of structural depth of mixture decrease from the 2.13 to 1.60.
文摘针对沥青洒布车横向洒布不均匀现象,对喷嘴的结构参数进行优化,以改善沥青洒布过程中的雾化质量。基于正交试验原理设计以喷嘴半球直径、切槽深度、切槽角为优化参数,以索特尔平均直径D_(32)及分布均匀性指数N为雾化特性指标的仿真方案。将VOF(Volume of Fluid)方法与DPM(Discrete Phase Model)方法进行耦合,通过VOF-to-DPM方法对喷嘴的试验方案进行仿真分析,并结合响应面法建立回归模型,优化求解获得最佳参数组合。结果表明:喷嘴的半球直径、切槽深度、切槽角对雾化特性有显著影响,且半球直径与切槽角之间存在显著的交互作用;喷嘴优化后在雾化质量上有显著提升,D_(32)减小了25.26%,N增加了10.27%。
