Modeling and Simulation of Railway Network in Compliance with Technical Specifications for Interoperability

Designing a Geo-Strategic Railway Freight Network in Brazil Using GIS

Sustainability ◽

10.3390/su13010085 ◽

2020 ◽

Vol 13 (1) ◽

pp. 85

Author(s):

Cassiano A. Isler ◽

Yesid Asaff ◽

Marin Marinov

Keyword(s):

Transport Networks ◽

Railway Network ◽

The Sustainable Development ◽

Railway Freight ◽

Minimum Number ◽

Technical Specifications ◽

Future Demands ◽

Terminal Operations ◽

Fully Connected ◽

South Brazil

The sustainable development of geo-strategic transport networks plays a key role to meet the current expansion of the demand for commerce and economic growth. In this paper, a new geo-strategic railway network for freight services is designed with the purpose of meeting the needs of current and future demands for freight transport in the state of Santa Catarina, South Brazil. The freight flows of bulk cargo, containers, and refrigerated and liquid cargo observed in 2005 and 2015 and expected for 2023 have been analyzed and assigned to a fully connected railway network. The number of trains to meet all the demands has been identified. The links that would have a minimum number of daily trains running on them have also been identified and analyzed. New assignments are proposed and visualized using GIS. Next, location and technical specifications of specialized intermodal terminals focused on the customers’ and operators’ needs are discussed. The study shows that technological specifications for terminal operations play an important role when dealing with multiple freight types and contribute to better use of the existing infrastructure.

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Modeling and Simulation of an Electric Vehicle with Independent Rear Motors to Estimate the Fuel Economy during EPA Drive Cycles

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.13.1.10 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

W. Browna ◽

Y. Liu

Keyword(s):

Modeling And Simulation ◽

Electric Vehicle ◽

Fuel Economy ◽

Environmental Protection Agency ◽

Hybrid Electric Vehicle ◽

Combustion Engine ◽

Rear Wheel ◽

Wheel Drive ◽

Technical Specifications ◽

Critical Components

The “Car of the Future” project converted a 2015 rear-wheel drive (RWD) Subaru BRZ into a hybrid electric vehicle (HEV) with an intermediate milestone of a battery electric vehicle (BEV). BEV architecture required removal of the conventional powertrain components, such as internal combustion engine, transmission and differential, introduced an electric axle and battery. This intermediate BEV step provided a point at which the vehicle could be evaluated in its all electric operation with the absence of what was once critical components including its original powertrain and powertrain electronics. This step also ensures the electric components are working properly before more complexity is added to the system in building HEV. In our previous work, BEV Vehicle Technical Specifications (VTS) or requirements were developed and an electric axle was appropriately sized and selected to meet these requirements. After selecting the electrical axle with independent rear motors that will meet BEV performance requirements, Environmental Protection Agency (EPA) fuel economy rating of the BEV should be assessed. This paper presents a drive cycle analysis of the BEV vehicle using the EPA Urban Dynamometer Driving Schedule (UDDS) and Highway Fuel Economy Test (HWFET) drive cycles by means of dynamic modeling and simulation. In this study, the power required at the wheels, the efficiency of each motor and the energy required at the selected electrical axle were determined. In addition, the city, highway and combined miles per gallon equivalent (MPGe) fuel economy were determined.

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