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EFFICIENCY OF AN OFF-ROAD HEAVY-DUTY SERIES HYBRID DRIVE BASED ON A MODIFIED WORLD HARMONIZED TRANSIENT CYCLE 基于改进世界协调瞬态循环的越野重型串联混合动力传动效率
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-12-01 DOI: 10.20858/tp.2022.17.4.16
Ugnė Koletė Medževeprytė, R. Makaras, Alfredas Rimkus
As electric drives slowly replace passenger cars and light special vehicles, electric drives in the heavy-duty road sector have started to emerge. As for off-road vehicles, there is some effort to reduce the amount of fossil fuel used. In this study, the series hybrid application for a heavy-duty tractor is investigated. Work conditions are described using modified worldwide transient vehicle cycle to evaluate the efficiency of an energy management system applied, as well as the overall vehicle performance and efficiency. As a result, in some test scenarios, smaller-than-expected energy outputs were identified and new ways to improve energy management were found.
随着电力驱动逐渐取代乘用车和轻型特种车辆,重型道路领域的电力驱动已经开始出现。至于越野车,有一些努力,以减少化石燃料的使用量。本文研究了串联混合动力在某重型拖拉机上的应用。使用改进的全球瞬态车辆循环来描述工作条件,以评估所应用的能源管理系统的效率,以及整体车辆性能和效率。结果,在一些测试场景中,确定了低于预期的能量输出,并找到了改进能源管理的新方法。
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引用次数: 1
IMPROVEMENT OF THE MECHANICAL PROPERTIES OF MOBILE PLATFORM STAINLESS CONSTRUCTION ELEMENTS 移动平台不锈钢构件力学性能的改进
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-12-01 DOI: 10.20858/tp.2022.17.4.08
B. Szczucka-Lasota, T. Wȩgrzyn
Stainless steel could be treated as the main material used to construct various means of transport, including mobile platforms and tank trucks. An austenitic steel known as 316L steel (1.4401) has high resistance to atmospheric corrosion, natural waters, water vapor, alkaline solutions, and acids, even at elevated temperatures. This steel is weldable, although it is also prone to various types of welding cracks. Many factors influence the quality and mechanical properties of a joint. The most significant of these is the appropriate selection of welding parameters, which should be determined precisely and separately for each type of sheet, depending on its thickness and geometric features. The aim of the present article is to study the influence of main TIG (Tungsten inert gas) welding parameters on the creation of proper joints used in the construction of mobile truck platforms or tank trucks. The proper selection of parameters enables the production of welds with good functional properties. A novelty of this article is the proposal to weld each layer of a thick joint with different parameters, which has an important influence on the mechanical properties of the joint. It is expected that the new material and technological solution will yield a joint with good corrosion resistance and increased mechanical properties. This is important in the responsible construction of means of transport, using the example of mobile platforms and tank trucks. Different tests verifying the properties of joints, including non-destructive testing, tensile strength tests, and fatigue tests, as well as a hardness probe, were applied.
不锈钢可以作为主要材料用于建造各种运输工具,包括移动平台和油罐车。一种被称为316L(1.4401)的奥氏体钢具有很高的抗大气腐蚀、天然水、水蒸气、碱性溶液和酸的能力,即使在高温下也是如此。这种钢是可焊接的,尽管它也容易产生各种类型的焊接裂纹。影响接头质量和力学性能的因素很多。其中最重要的是适当选择焊接参数,应根据其厚度和几何特征,对每种类型的薄板分别精确确定焊接参数。本文的目的是研究主要TIG(钨惰性气体)焊接参数对创建用于移动卡车平台或油罐车的适当接头的影响。合理选择参数,可以生产出具有良好功能性能的焊缝。本文的新颖之处在于提出了厚接头各层焊接参数的不同,这对接头的力学性能有重要影响。预计新材料和技术解决方案将产生具有良好耐腐蚀性和提高机械性能的接头。以移动平台和油罐车为例,这在负责任的运输工具建设中非常重要。应用了不同的测试来验证接头的性能,包括无损测试、拉伸强度测试和疲劳测试,以及硬度探头。
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引用次数: 0
HUMAN AS A MAIN RISK DRIVER: UNDECLARED DANGEROUS GOODS IN MARITIME TRANSPORT & AVIATION 人是主要风险驱动因素:海上运输和航空中未申报的危险货物
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-12-01 DOI: 10.20858/tp.2022.17.4.17
Andrea Maternová, Matúš Materna
Dangerous goods (DGs) not declared for transport as required by the regulations can give rise to risks, as they can endanger public safety or the environment. This study explains the risks posed by undeclared shipments by providing information about the most common undeclared DGs aboard aircraft and maritime ships, legal frameworks regulating the proper transportation of DGs, and key mechanisms for preventing the occurrence of undeclared DG shipments. This paper identifies the responsibilities of each stakeholder involved in the process of DG transportation. The main objective of this paper is to reveal human errors and dishonest techniques within the supply chain when DGs are transported by air and sea.
未按规定申报运输的危险货物可能会引发风险,因为它们可能危及公共安全或环境。本研究通过提供有关飞机和海运船舶上最常见的未申报DG的信息、监管DG正确运输的法律框架以及防止未申报DG货运发生的关键机制,解释了未申报货运带来的风险。本文确定了DG运输过程中每个利益相关者的责任。本文的主要目的是揭示DG通过空运和海运运输时供应链中的人为错误和不诚实技术。
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引用次数: 0
PREDICTION OF FINE PARTICULATE MATTER IN LOW-EMISSION ZONES USING A MODIFIED NUMERICAL METHOD FOR A SYSTEM OF ORDINARY DIFFERENTIAL EQUATIONS 用常微分方程组的修正数值方法预测低排放区细颗粒物
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.17
A. Asenov, I. Georgiev, V. Pencheva, Kremena Mineva
Currently, many European cities have severely exceeded the EU air quality standards and are struggling with high concentrations of fine particulate matter PM10 and PM2.5 in the air, with road transport often being one of the major polluters. One of the forms for correction of the problem that many cities in the EU are currently using is the construction of low-emission zones. For the prediction of PM10 and PM2.5, a modified numerical method for a system of ordinary differential equations has been proposed. In the right part of this system, in addition to the main trend and the periodicity of PM10 and PM2.5, their correlation is taken into account. Against the background of the best solution obtained, a forecast is made for the emission levels in a period of one week in the town of Ruse.
目前,欧洲许多城市的空气质量严重超过欧盟标准,空气中存在高浓度的细颗粒物PM10和PM2.5,而道路运输往往是主要污染源之一。欧盟许多城市目前正在采用的一种纠正这一问题的形式是建设低排放区。针对PM10和PM2.5的预测,提出了一种常微分方程组的修正数值方法。在该系统的右侧,除了PM10和PM2.5的主要趋势和周期性外,还考虑了它们的相关性。在获得最佳解决方案的背景下,对Ruse镇一周内的排放水平进行了预测。
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引用次数: 1
EVALUATION OF THE RATIOS OF THE MAIN INDICATORS OF THE DRY SEALING OF THE CYLINDER-PISTON GROUP OF INTERNAL COMBUSTION ENGINES USING A SOLID LUBRICANT 用固体润滑剂对内燃机缸-活塞组干密封主要指标比值的评价
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.09
B. Nuralin, M. Kuanyshev, A. Murzagaliev, A. Kaukarov, Isatai Utebayev
This article presents the results of a study of an alternative method for reducing friction losses in the cylinder-piston group of internal combustion engines based on an experimental installation, taking into account changes in the real state of the working surfaces of the mating parts of the piston ring-cylinder pair depending on the operating time. The factors with a progressive effect on the operation of engine friction units as they wear out are studied, and the degree of their influence on wear is estimated. A model of the friction unit of a cylinder-piston group (piston-piston ring pair) of an internal combustion engine based on a solid antifriction material operating without the use of a lubricating fluid is developed and investigated. Comparative results of determining the wear indicators of sealing rings by various methods of wear control are presented. A method for predicting the resource and the real state of the engine is proposed.
本文介绍了一种基于实验装置的减少内燃机气缸-活塞组摩擦损失的替代方法的研究结果,该方法考虑了活塞环-气缸副配合部件的工作表面的实际状态随工作时间的变化。研究了发动机摩擦单元在磨损过程中对其工作产生渐进式影响的因素,并估计了这些因素对磨损的影响程度。建立了一种基于固体减摩材料的内燃机气缸-活塞组(活塞-活塞环副)摩擦单元模型,并对其进行了研究。介绍了各种磨损控制方法确定密封圈磨损指标的比较结果。提出了一种预测引擎资源和真实状态的方法。
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引用次数: 1
PROBLEM WITH DETERMINING THE VEHICLE IMPACT VELOCITY FOR CAR BODIES BREAKING APART 确定车身解体时车辆撞击速度的问题
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.07
P. Aleksandrowicz, I. Aleksandrowicz, Krzysztof Kukiełka, R. Patyk, Piotr Stanowski
This article investigates the impact of a passenger car on a tree, which resulted in the car body breaking apart. A side impact of the car on a tree at high driving speeds is not a standard test in the provisions of the applicable Directives of the European Economic Community, even though the impact poses a serious threat to the driver and the passengers. The threat comes from a deep impaction of the barrier into the body which damages the safety cage. For such impacts, it is very difficult for the vehicle speed to be reconstructed. In practice, expert witnesses and appraisers usually disregard the body-breaking-apart-related energy due to a difficulty in establishing the data for such calculations, which leads to simplifications and speed underestimates. Performing the right simulation of such impacts with accident reconstruction programs without determining the adequate input data for calculations is also impossible to calculate. This paper presents a range of studies and calculations for such incidents and for identifying the input parameters for collision simulations. The approach presented in this article should be used by expert witnesses and researchers. Therefore, this paper provides insights into theory and practice.
这篇文章调查了一辆客车撞上一棵树,导致车身破裂的情况。在欧洲经济共同体(European Economic Community)的适用指令中,汽车在高速行驶时对树上的侧面撞击不是标准测试,即使这种撞击对驾驶员和乘客构成严重威胁。这种威胁来自于屏障对人体的深度撞击,从而损坏了安全笼。由于这种冲击,车辆的速度很难重建。在实践中,专家证人和鉴定人通常忽略与身体分裂有关的能量,因为很难建立这种计算的数据,这导致了简化和速度低估。在没有确定足够的计算输入数据的情况下,用事故重建程序对这种影响进行正确的模拟也是不可能计算出来的。本文提出了一系列关于此类事件的研究和计算,并确定了碰撞模拟的输入参数。本文提出的方法应由专家证人和研究人员使用。因此,本文具有一定的理论和实践意义。
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引用次数: 1
TRANSPORT MODE CHOICE AMONG OFF-CAMPUS STUDENTS IN A HILLY ENVIRONMENT: THE CASE OF AIZAWL, INDIA 丘陵环境下校外学生交通方式的选择&以印度艾扎沃为例
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.14
Benjamin L Saitluanga, Lal Hmangaihzela
In recent years, the transport mode choice of students of higher educational institutions has become a subject of increasing interest. Investigating the modal choice of students, who form a considerable section of the population, is crucial for sustainable urban transport planning and understanding the quality of life of students. Reviews of previous studies have indicated that hilly cities in less developed countries are neglected in transportation studies. The present paper investigates the travel behaviour of non-local, off-campus college students in Aizawl – a fast-growing hilly city in northeast India. The study found that transport mode choices are influenced by interrelated factors, including socio-economic background, demographic, availability of transport mode and location of housing. It was also found that walking and public buses are the most preferred modes of commuting among the studied college students. Female students who rent houses near their colleges are more likely to walk than their male counterparts. On the other hand, male students belonging to high-income families tended to travel by private vehicles from their residences, which are located relatively far away from colleges. The study argues for the enhancement of the intake capacity of residential hostels inside the campus to improve the growing transport problem of off-campus students in the city.
近年来,高校学生交通方式的选择越来越受到人们的关注。调查学生的出行方式选择,对于可持续城市交通规划和了解学生的生活质量至关重要。对以往研究的回顾表明,在交通研究中,欠发达国家的丘陵城市被忽视了。本文调查了印度东北部快速发展的丘陵城市Aizawl的非本地校外大学生的旅行行为。研究发现,交通方式的选择受到相互关联的因素的影响,包括社会经济背景、人口、交通方式的可用性和住房位置。研究还发现,步行和公共巴士是被研究大学生最喜欢的通勤方式。在大学附近租房的女生比男生更有可能走路。另一方面,属于高收入家庭的男学生倾向于从他们的住所乘坐私家车出行,因为他们的住所距离大学相对较远。该研究主张提高校园内寄宿宿舍的容纳能力,以改善该市日益严重的校外学生交通问题。
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引用次数: 1
APPLICATION OF TRANSPORT SECURITY SYSTEM SYMBOLOGY FOR EMERGENCY MASS NOTIFICATION SYSTEMS 交通安全系统符号在大规模紧急通知系统中的应用
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.11
Bogusław Jagusiak, Grzegorz Pokorski
The visualisation of resources is becoming an increasingly important factor in the operations of crisis management teams. The efficiency of crisis management processes depends on the possibility of data exchange between crisis management teams and people within the range of expected and actual threats. An important part of the information provided to people is the description of the condition of the transport system. The authors of this work carried out comparative analyses of visualisation standards in terms of a selected transport system for six selected countries and organisations. Based on the survey results, they managed to assess the functionality and usability of the visualisation of the Polish transport system. This research was based on a modified model of assessment of software functionality and usability. Methods of determining the functionality and usability of a transport system visualisation can help crisis management teams assess the suitability of IT tools for use in mass notification systems. The literature on this subject lacks a scientific analysis of the Polish method of the visualisation of the transport system. Therefore, this study will clearly fill this research gap.
在危机管理团队的运作中,资源的可视化正成为一个日益重要的因素。危机管理流程的效率取决于危机管理团队和人员之间在预期和实际威胁范围内交换数据的可能性。提供给人们的信息的一个重要部分是对运输系统状况的描述。这项工作的作者在六个选定的国家和组织的选定运输系统方面进行了可视化标准的比较分析。根据调查结果,他们设法评估了波兰交通系统可视化的功能和可用性。本研究基于一种改进的软件功能和可用性评估模型。确定运输系统可视化的功能和可用性的方法可以帮助危机管理团队评估在大规模通知系统中使用IT工具的适用性。关于这一主题的文献缺乏对波兰运输系统可视化方法的科学分析。因此,本研究将明显填补这一研究空白。
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引用次数: 1
ROAD SAFETY AND THE CAUSES OF ROAD ACCIDENTS IN POLAND 波兰的道路安全和道路事故的原因
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.02
Piotr Gorzelańczyk, M. Jurković, Justyna Skibinska, T. Kalina
The number of road traffic accidents in the world has been increasing. This is mainly related to the constant increase in road traffic. The aim of this article is to examine the causes of road accidents in Poland in terms of road traffic safety. For this purpose, road incidents that occurred in Poland were analysed. In order to verify the presented statistical data on the state of safety in Poland, a survey was carried out to indicate the factors that most often cause traffic accidents. Possibilities for increasing the efficiency of traffic safety and an evaluation of the level of safety in vehicles were also part of the survey. The results showed that the state of RS, in the opinion of the respondents, is poor. The respondents correctly indicated the most frequent causes of road accidents, which confirms their knowledge in the field of road safety. The survey also showed that the activities of the police and programmes for increasing safety need improvement. According to the respondents, the actions that should be taken to improve safety are, first of all, the improvement of the technical condition of roads and the modernisation of road infrastructure. In addition, the survey showed that most men are car drivers, while women primarily travel on foot; the results also showed that the knowledge of RS is better among women.
世界上道路交通事故的数量一直在增加。这主要与道路交通不断增加有关。本文的目的是研究波兰道路交通安全方面的道路事故原因。为此目的,对波兰发生的道路事故进行了分析。为了核实所提出的关于波兰安全状况的统计数据,进行了一项调查,以指出最常引起交通事故的因素。提高交通安全效率的可能性和对车辆安全水平的评价也是调查的一部分。结果显示,在受访者看来,RS的状态很差。受访者正确指出了道路事故最常见的原因,这证实了他们在道路安全领域的知识。调查还显示,警察的活动和加强安全的方案需要改进。根据受访者,应该采取的行动,以提高安全,首先,道路的技术条件的改善和道路基础设施的现代化。此外,调查还显示,大多数男性开车,而女性主要是步行出行;结果还显示,女性对RS的了解程度更高。
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引用次数: 1
EVALUATION OF SOCIO-ECONOMIС VARIABLES FOR THE CONSTANTINE TRAMWAY LINE 康斯坦丁有轨电车线路的社会经济变量评估
IF 0.7 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-30 DOI: 10.20858/tp.2022.17.3.15
Imane Harkat, Nadra NAIT AMAR, Bouba Benrachi, D. Gattuso
The Constantine tramway line in Algeria has many variables that can be analysed to assess the impact of the line. These variables include social ones, such as the rational supply of transport between different modes of travel, the place of people with reduced mobility in the supply and interior and exterior design. Moreover, the economic variables that are the most dominant in relation to its importance in the development of the economy of the city are the reliability and comfort made to the regularity of the transport time in relation to time savings and intermodality at stopping points. To this end, this article examines these different variables during several commissioning periods in order to determine the impact of the introduction of the tramway line in the Constantine metropolitan area. Its approach is carried out through a field survey, interviews and on-site observations with a population made up of users of different travel modes. The results confirm that the tramway line linking the city of Constantine and the new town of Ali Mendjeli has a strong effect on ridership. On the other hand, its effects seem minimal in terms of rational supply and intermodality between different travel modes. Meanwhile, reliability and regularity are topics that deserve to be explored. The accessibility of people with reduced mobility is considered a primary objective of the tramway system.
阿尔及利亚的康斯坦丁有轨电车线路有许多变量,可以对这些变量进行分析,以评估线路的影响。这些变量包括社会变量,如不同出行方式之间的合理交通供应、流动性降低的人在供应中的位置以及内部和外部设计。此外,就其在城市经济发展中的重要性而言,最主要的经济变量是运输时间的规律性相对于停车点的时间节约和多式联运的可靠性和舒适性。为此,本文在几个试运行期间研究了这些不同的变量,以确定有轨电车线路在康斯坦丁大都会区引入的影响。其方法是通过实地调查、访谈和现场观察,对不同旅行方式的用户进行调查。结果证实,连接康斯坦丁市和Ali Mendjeli新城的有轨电车线路对乘客量有很大影响。另一方面,就合理供应和不同旅行方式之间的联运而言,其影响似乎很小。同时,可靠性和规律性也是值得探讨的课题。有轨电车系统的一个主要目标是为行动不便的人提供便利。
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引用次数: 1
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Transport Problems
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