以一款传统后轴驱动柴油物流车为原型,在保证动力性的前提下,为了改善整车排放性能,降低燃油消耗,设计了一款搭配汽油机的混合动力物流车.通过理论匹配计算设计了新的动力系统,同时制定了合理的动力分配控制策略.利用AVL Cruise软件搭...以一款传统后轴驱动柴油物流车为原型,在保证动力性的前提下,为了改善整车排放性能,降低燃油消耗,设计了一款搭配汽油机的混合动力物流车.通过理论匹配计算设计了新的动力系统,同时制定了合理的动力分配控制策略.利用AVL Cruise软件搭建了整车模型,进行了加速与爬坡仿真试验,并基于CWTVC工况进行了循环工况仿真分析,得到了整车动力性仿真结果及经济性仿真结果.最后基于多目标粒子群算法,在保证电池SOC(state of charge)平衡前提下,对整车结构参数及控制参数等进行了优化.结果表明:理论匹配计算结果较合理,设计的混动车优化前,爬坡性能、加速性能以及最高车速均满足动力性能指标,整车燃油消耗较原车降低了28.00%;优化后,整车综合能耗较优化前降低了15.00%.展开更多
To improve the safety of trains running in an undesirable wind environment,a novel louver-type wind barrier is proposed and further studied in this research using a scaled wind tunnel simulation with 1:40 scale models...To improve the safety of trains running in an undesirable wind environment,a novel louver-type wind barrier is proposed and further studied in this research using a scaled wind tunnel simulation with 1:40 scale models.Based on the aerodynamic performance of the train-bridge system,the parameters of the louver-type wind barrier are optimized.Compared to the case without a wind barrier,it is apparent that the wind barrier improves the running safety of trains,since the maximum reduction of the moment coefficient of the train reaches 58%using the louver-type wind barrier,larger than that achieved with conventional wind barriers(fence-type and grid-type).A louver-type wind barrier has more blade layers,and the rotation angle of the adjustable blade of the louver-type wind barrier is 90–180°(which induces the flow towards the deck surface),which is more favorable for the aerodynamic performance of the train.Comparing the 60°,90°and 120°wind fairings of the louver-type wind barrier blade,the blunt fairing is disadvantageous to the operational safety of the train.展开更多
文摘以一款传统后轴驱动柴油物流车为原型,在保证动力性的前提下,为了改善整车排放性能,降低燃油消耗,设计了一款搭配汽油机的混合动力物流车.通过理论匹配计算设计了新的动力系统,同时制定了合理的动力分配控制策略.利用AVL Cruise软件搭建了整车模型,进行了加速与爬坡仿真试验,并基于CWTVC工况进行了循环工况仿真分析,得到了整车动力性仿真结果及经济性仿真结果.最后基于多目标粒子群算法,在保证电池SOC(state of charge)平衡前提下,对整车结构参数及控制参数等进行了优化.结果表明:理论匹配计算结果较合理,设计的混动车优化前,爬坡性能、加速性能以及最高车速均满足动力性能指标,整车燃油消耗较原车降低了28.00%;优化后,整车综合能耗较优化前降低了15.00%.
基金Project(2017T001-G)supported by the Science and Technology Research and Development Program of China Railway CorporationProject(2017YFB1201204)supported by the National Key Research and Development Program of China+2 种基金Project(U1534206)supported by the National Natural Science Foundation of ChinaProject(2015CX006)supported by the Innovation-driven Plan in Central South University,ChinaProject(2017zzts521)supported by the Fundamental Research Funds for the Central Universities,China
文摘To improve the safety of trains running in an undesirable wind environment,a novel louver-type wind barrier is proposed and further studied in this research using a scaled wind tunnel simulation with 1:40 scale models.Based on the aerodynamic performance of the train-bridge system,the parameters of the louver-type wind barrier are optimized.Compared to the case without a wind barrier,it is apparent that the wind barrier improves the running safety of trains,since the maximum reduction of the moment coefficient of the train reaches 58%using the louver-type wind barrier,larger than that achieved with conventional wind barriers(fence-type and grid-type).A louver-type wind barrier has more blade layers,and the rotation angle of the adjustable blade of the louver-type wind barrier is 90–180°(which induces the flow towards the deck surface),which is more favorable for the aerodynamic performance of the train.Comparing the 60°,90°and 120°wind fairings of the louver-type wind barrier blade,the blunt fairing is disadvantageous to the operational safety of the train.
