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941.
三大件转向架货车动力学建模与仿真 总被引:4,自引:2,他引:4
介绍了ADAMS及ADAMS/Rail动力学仿真软件的模块组成及功能,建立了三大件转向架货车的非线性数学模型,其中转向架中央悬挂装置中斜楔摩擦块的建模直接采用更接近实际的接触模型。应用ADAMS/Rail软件对货车系统的运动稳定性、曲线通过性及运行平稳性等动力学性能进行了分析,发现通过一定的技术改造,三大件转向架货车具有良好的动力学性能。结果表明该软件能够建立较复杂的车辆系统仿真模型,分析结果较合理。 相似文献
942.
25t轴重货车的可行性研究 总被引:1,自引:0,他引:1
本文首先分析了带有传统三大件转向架货车的轴重由21t提高为25t后轮轨动力作用的变化情况。通过研究,提出改变我国传统转向架结构和优化参数的途径来降低轮轨的动力作用并探讨在既有线路上实现25t轴重的可行性。 相似文献
943.
加大车辆轴重是提高铁路运输能力的重要方法,但这势必会引起轮轨接触应力的增加。本文从理论计算和实验分析两个方面,研究了加大车轮直径对改善轮轨接触应力的关系,计算及实验结果表明,将货车车轮直径由840mm加大至915mm是有利的。 相似文献
944.
连云港铁路枢纽货场布局规划研究 总被引:1,自引:0,他引:1
文章对连云港铁路枢纽既有货场规模及运力进行综合分析,结合连云港地区城市规划及经济发展状况和"十二五"期间铁路建设状况,提出了连云港地区货场布局规划方案,并且论证了方案的可行性,提出了新建赣榆北、杨集、灌南和灌云货场,改建海州货场的布局方案。 相似文献
945.
This paper reports the results of a stated-preference study aimed at investigating how transport decisions are made by receivers
or by transport operators about the potential use of an urban freight consolidation centre in the city of Fano, Italy. Because
there are no revealed preference data, a stated-choice methodology is used. The stated-choice experiments present two alternatives—one
using a private vehicle subject to various traffic regulations and one using the urban freight consolidation centre with varying
cost and efficiency levels. Conventional discrete choice data modelling shows that the potential demand is influenced mainly
by the distance of the parking bay from the shop, by access permit cost, by the service cost of the urban freight consolidation
centre, and by the delay in delivery time. Simulations are then performed to assess how the potential demand is affected by
various incentives and regulations affecting urban goods distribution.
Edoardo Marcucci is Associate Professor of Applied Economics at the Faculty of Political Sciences, University of Roma Tre, Italy, General Secretary of the Italian Society of Transportation Economists, and co-founder of the Kuhmo—Nectar Conference and Summer School Series on Pricing, Financing, Regulating Transport Infrastructures and Services. He has studied freight transportation concentrating on interactions along logistic supply chains. Romeo Danielis is Full Professor at the University of Trieste, Italy. He is managing editor of European Transport\Trasporti Europei. He has published articles on input-output modelling, regional environmental policy, social costing of transport externalities, EU enlargement and on several transport issues including road pricing, the Down-Thompson paradox, energy use and CO2 emissions, freight transport demand and stated preferences. 相似文献
Edoardo MarcucciEmail: |
Edoardo Marcucci is Associate Professor of Applied Economics at the Faculty of Political Sciences, University of Roma Tre, Italy, General Secretary of the Italian Society of Transportation Economists, and co-founder of the Kuhmo—Nectar Conference and Summer School Series on Pricing, Financing, Regulating Transport Infrastructures and Services. He has studied freight transportation concentrating on interactions along logistic supply chains. Romeo Danielis is Full Professor at the University of Trieste, Italy. He is managing editor of European Transport\Trasporti Europei. He has published articles on input-output modelling, regional environmental policy, social costing of transport externalities, EU enlargement and on several transport issues including road pricing, the Down-Thompson paradox, energy use and CO2 emissions, freight transport demand and stated preferences. 相似文献
946.
基于发货方追踪货物运输全过程的货物运输调查是掌握一个国家或区域综合运输情况以及运输与经济之间关联的重要基础数据来源。在介绍国外基于发货方货物运输调查的概况和方法的基础上,总结其对我国综合运输调查开展的启示具有一定的意义。 相似文献
947.
948.
ABSTRACTExploring route choice in the context of tolled alternatives can support road operators to achieve better utilization of the infrastructure, as well as maximizing revenue collection. The research presented in this paper is conducted in the context of OPTIMUM, a European Union-funded project. The research objectives include a two-component system of models that proactively calculates commercial vehicles’ toll prices. The component presented in this paper rests on the development of a route choice model that estimates the probabilities of using two alternative routes (toll road vs. national road), based on route attributes and user characteristics. To explore the usefulness of the proposed methodology a case study involving 50 truck drivers and 25 freight operators was conducted in Portugal between January 2016 and November 2017. Results from the route choice model reveal interesting insights about the role of incentives in the choice of toll roads, the perspectives of the different decision-makers and produce Values of Time for the study area. 相似文献
949.
This paper looks at the environmental effects of shifting from road to rail freight transportation. Little data is available to shippers to calculate the potential CO2 savings of an intermodal shift. In this paper we analyze a data set of more than 400,000 intermodal shipments to calculate the CO2 intensity of intermodal transportation as a distinct mode. Our results indicate an average intensity of 67 g of CO2 per ton-mile, but can vary between 29 and 220 g of CO2 per ton-mile depending on the specific origin–destination lane. We apply the market area concept to explain the variance between individual lane intensities and demonstrate the complexity in predicting the potential carbon savings in a switch from truckload to intermodal. 相似文献
950.