Transport Operations Research Articles

ОПРЕДЕЛЕНИЕ РАЦИОНАЛЬНОГО ПЕРИОДА ЭКСПЛУАТАЦИИ КАРЬЕРНЫХ ТРАНСПОРТНЫХ СРЕДСТВ И ОЦЕНКА ЭФФЕКТИВНОСТИ ИХ ИСПОЛЬЗОВАНИЯ

The paper defines the rational period of operation of quarry motor transport. It is established that the use of the obtained results of calculating the rational period of operation makes it possible to achieve maximum efficiency of technical operation of quarry equipment, while minimizing financial costs for the maintenance and replacement of transport.

Modern approach in railcar fleet management

The operation of railway transportation has a number of peculiarities. The transfer of the railcar fleet to the ownership of operating companies has obviously led to changes in the management of railway transportation. The analysis of the total freight turnover and the number of managed railcars shows that 20 largest railcar fleet operators are market leaders. Despite a number of advantages, the ownership of rolling stock by private companies causes a number of problems, the most acute of which are surplus and deficit of the railcar fleet, accumulation of “abandoned” trains. Such problems are especially evident in the logistics chains of international transportation corridors. In this regard, it is advisable to analyze the controlling actions of all participants of the transportation process, to assess the degree of participation of each operator. Solving the problems of railcar fleet management using the restrictions of pulling cars on the main infrastructure tracks with seeming advantages leads to the increasing railcar turnover and, as a consequence, the growth of the operating railcar fleet, i. e. potential surplus. Regulation of the railcar fleet should be carried out using the system of technical standardization. However, the system itself is subject to revision, especially with regard to the planning period by reducing the latter. Increasing the dynamics of regulation will make it possible to meet the transportation needs in time, avoid accumulation of “abandoned” trains, specify the operating car fleet managed by companies - operators and bring railway transportation closer to the logistic principles of freight delivery. For this purpose, it is expedient to study in detail the technology of interaction of all railway transportation participants, especially including them in multimodal transport corridors.

ОБЗОР ПРОБЛЕМЫ ИСПОЛЬЗОВАНИЯ ГАЗОТУРБИННОЙ УСТАНОВКИ ДЛЯ ЗАРЯДКИ АККУМУЛЯТОРНЫХ СИСТЕМ ГРАЖДАНСКОГО ЭЛЕКТРОТРАНСПОРТА

The issues of energy saving are considered on the example of the operation of urban electric transport. The review of various chargers, stations for electric transport is carried out, various comparative characteristics of microturbine and gas piston installations are presented. The technical features of electric vehicles of various manufacturers are analyzed, the classification of electric vehicle power plants is given, the results of using prototypes of urban electrical engineering are indicated, and a review of microturbine technologies on the Russian market is given.

ОПРЕДЕЛЕНИЕ РАЦИОНАЛЬНОГО ПЕРИОДА ЭКСПЛУАТАЦИИ КАРЬЕРНОГО АВТОМОБИЛЬНОГО ТРАНСПОРТА

The paper considers the main measures aimed at determining the rational period of operation of quarry road transport. It is established that when using the developed structure for carrying out repairs with effective frequency, volume and content of work, the operational life of cars increases, which makes it possible to achieve maximum efficiency of technical operation of quarry equipment for mining and processing plants and reduce transport downtime during repair.

Modernization of skidding and primary removal of wood in the Vologda Region through the use of relevant domestic solutions

In the paper on the basis of the analysis of technical indicators and the aggregates used of the applied and introduced forest machinery (multi-operational forest machines) a study was carried out on the efficiency of variants in the sorting of logs during the implementation of technological operations in skidding and primary timber transportation under typical natural and production conditions Totemsky Forestry - a branch of the company SAU Forestry of the Vologda region “Vologda Forestry Association” (Vologda region, Russian Federation). As a result of analyzing the ratio of torque and other given dimensional and qualitative indicators, recommendations are given on the use of wheeled picker “Trom 20” for more efficient work in conditions of insufficient bearing capacity of the forest harvesting area soil.

Co2 Transport and Storage Network Operation

Co2 Transport and Storage Network Operation

Modeling compartmentalization within intracellular signaling pathway

We present a novel approach to modeling receptor-activated signaling pathways that take into account the compartmentalization of receptors and their effectors, both on the cell surface and in dynamic intracellular vesicles called endosomes. The first building block of the model concerns compartment dynamics. It takes into account creation of de novo endosomes, i.e. endocytosis, and further recycling of endosomes to the cell surface or degradation, as well as fusion of endosomes via coagulation dynamics. The second building block concerns biochemical reactions on the cell surface and within intra-cellular compartments. Both building blocks are coupled by the transfer of molecules that occurs at each event that modifies the compartments. The model is formulated as a integro-partial differential equation, with transport and coagulation operators, and source terms, coupled to an integro-differential equation. In this work, we prove sufficient conditions to obtain exponential ergodicity for the size distribution of intracellular compartments. We further design a finite volume scheme to simulate our model. Finally, we show two application cases that show qualitative agreement with recently published data, proving that our model can help capture the spatio-temporal complexity of receptor-activated signaling pathway.

ОПРЕДЕЛЕНИЕ ПОЦИЛИНДРОВОЙ МОЩНОСТИ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ ПРИ РАБОТЕ В РЕЖИМЕ СВОБОДНОГО РАЗГОНА

Efficient operation of transport and technological machines for agricultural purposes is impossible without a timely assessment of the energy performance of their internal combustion engines. The torque and power of each cylinder can be estimated by the magnitude of the reactions of the engine support when operating in free acceleration mode with some of the cylinders disconnected. (Research purpose) The research purpose is improving the method of determining the cylinder-by-cylinder power of an internal combustion engine in the free acceleration mode by the magnitude of the reactions on its supports. (Materials and methods) Developed a methodology for estimating the power of each engine cylinder by the magnitude of the reactions on its supports and the current value of the crankshaft speed. Experimental studies were carried out on a diesel four-cylinder four-stroke engine D-243. During the execution of the research program, the fuel supply to one or two cylinders was gradually turned off, the engine operation mode was set to free acceleration, and forces arising in the supports were recorded using strain gauges and a set of measuring equipment. The following research methods were applied: a priori ranking, regression and computational analysis. (Results and discussion) It was found that the maximum torque is reached in the crankshaft speed range of 1298-1467 revolutions per minute and is 285 nanometers when all cylinders are running, 219 - when three cylinders are running and 148 - when two cylinders are running. The maximum value of the effective power was 57.8 kilowatts for all cylinders, 34 for three cylinders and 22 for two cylinders. It was determined when assessing engine power during the alternate shutdown of one of the cylinders that the effective engine power varies in the range of 33-33.4 kilowatts. (Conclusions) The obtained results of experimental studies can be used in the implementation of a method for operational control of the power of each cylinder of an internal combustion engine under operating conditions.

Диагностика неисправностей тягового электродвигателя электропоезда ЭД9Т методом спектрального анализа тока в обмотке якоря

The results of the research in the sphere of the efficiency increase of functioning of the traction electric motor of the ED9T electric train have been presented. Smooth and sustainable railway transport operation depends greatly on the reliability of the traction motor of the ED9T electric train and its efficiency of use. The most widespread damages in the armature winding of the traction motor of ED9T electric train are violations of the terms of the armature commuting, inter-winding faults because of the damage of the insulation of coil turns, closure of winding on the case («ground») and double closures on the ground. The authors offered a logarithmical spectral method of diagnostics allowing to determine malfunctions on the results of mathematical spectrogram processing for rapid clarification of the faults of the armature windings of the traction electric motor.

Research on Fuzzy Logic Approach to Cost-Benefit Analysis of Multimodal Transportation for China-Europe Liner Game

Abstract The implementation of the “Belt and Road” initiative provides unprecedented development opportunities for China-Europe liner multimodal transportation. In this paper, we constrain the cost-effectiveness of multimodal transportation between China and Europe using linear games from three perspectives: transportation cost, transportation time, and cargo time value. We also establish a cost-effective decision-making model. At the same time, a simulated annealing algorithm is introduced on the basis of a genetic algorithm, an adaptive genetic algorithm based on simulated annealing is designed to solve the model, and the optimal cost-benefit path assessment of China-Europe liner multimodal transportation is carried out based on the fuzzy logic method. Example analysis is carried out with three demands, and the advantages and disadvantages of the set of transportation route schemes are obtained. The optimal cost-effective scheme is selected as Scheme III, which has the highest scheme sticker schedule of 0.841, which verifies the feasibility of the model. The sensitivity analysis of transportation costs and transportation time shows that different transportation costs and times have certain influences on the transportation route selection of other goods. The cost-benefit analysis method for China-European liner multimodal transportation constructed in this paper provides scientific and reasonable guidance for multimodal transportation operators on path selection, which is of certain practical significance.

Information models for ensuring the sustainability of transport operations formation in the context of digitalization

The conditions for the formation of an information model for ensuring transport activities in the context of digitalization and the digital transformation of the transport industry are considered. It is shown that the development of information support will allow switching to transport from information systems that perform a passive function and information support for management, to active, predictive management systems based on increasing the degree of use of available information and its verification.

Optimization of logistics intermodal scheduling model based on counting and efficiency in the context of low carbon economy

Abstract It is of great significance to study how to reasonably allocate materials and optimize distribution routes in the context of a low-carbon economy to improve the efficiency of logistics work. This paper constructs a low-carbon economy logistics intermodal dispatch optimization model on the basis of the counting and efficiency model. It carries out the optimization of transport routes under the consideration of logistics transportation externality cost. Its total generalized transportation cost is minimized as the goal of optimization modeling, establishing the cargo transportation operation flow, and outputting the logistics flow distribution and path optimization scheme under the whole integrated transportation network. The multimodal transportation optimization model is solved by using triangular fuzzy theory to select the optimal scheduling scheme, and simulation analysis is carried out using an earthquake-stricken area as an example. The results show that the comprehensive satisfaction degree of the disaster victims of the rescue plan obtained by the proposed intermodal logistics scheduling optimization model is 0.9022. At the same time, the value of GAP obtained by this paper’s method for optimization in a multi-scenario deterministic environment is smaller than that of the traditional method by 0.002~0.068, and the running time of this paper’s method is less than that of the conventional algorithm by 81.9~1400.5 s. The study verifies the validity of the proposed intermodal logistics scheduling model and is useful for improving logistics dispatching and path optimization. The study confirms the effectiveness of the model proposed in this paper, which has some applications and promotion potential for improving logistics deployment and other auxiliary decision-making.

ПАРАМЕТРЫ КИНЕМАТИКИ И ДИНАМИКИ ЭЛЕКТРИФИЦИРОВАННОЙ ПЛАТФОРМЫ ДЛЯ ПОСТРОЕНИЯ МОДЕЛИ АДАПТИВНОГО УПРАВЛЕНИЯ

Increasing the efficiency of transport operations at agribusiness enterprises is inextricably linked with the introduction of automated, including adaptive control systems. This makes it possible to optimize and expand the functions of vehicles, improve the quality of their performance in conditions of significant unpredictable changes in the parameters of the control object and the external environment. The realization of the advantages of adaptive control is possible when using methods based on the laws of mechanics and taking into account all the essential features of both the vehicle design and its interaction with the external environment. (Research purpose) The research purpose is analyzing and substantiating the parameters that determine the kinematics and dynamics of a four-wheeled vehicle with independent drive of all propellers, an electrified platform, and building adaptive control algorithms. (Materials and methods) Using the methods of theoretical mechanics, the main groups of parameters describing the static and dynamic loading of an electrified platform, as well as its interaction with the environment, are considered. (Results and discussion) Based on the performed analysis of the proposed design of the electrified platform, its functionality and control features, groups of parameters are given that fully characterize the properties of the vehicle itself and its interaction with the environment. (Conclusions) The use of vehicles with a fully independent drive of rotational and rotary movement of the wheels allows you to get a number of advantages. To implement them, it is necessary to use adaptive control systems that must take into account all the groups of parameters considered.

ECONOMIC IMPACT OF COMMUTERS AND DRIVERS’ PERCEPTION OF MINIBUS (KOROPE) AS A MEANS OF PUBLIC TRANSPORTATION IN OSOGBO, OSUN STATE, NIGERIA

The Osogbo metropolitan has seen several transportation-related problems due to its dense population, limited road space, land-use characteristics, absence of mass transit, poorly executed development plans, and encroachments on private property. The specific objectives are to identify the socioeconomic characteristics of the participants in Osogbo, Osun state; investigate commuters' and drivers' perceptions of Korope transport services in Osogbo, Nigeria; and evaluate the function of Korope transport services in the study area concerning public transportation. Data was gathered using a structured survey design questionnaire. The purposive sampling method was employed. In Osogbo, Osun state, Nigeria, commuters, passengers, and Korope transport operators and owners make up the study's population. However, 1,500 of those commuters, passengers, and Korope transport operators reside in Osogbo, Osun state, Nigeria. The study's sample frame consists of passengers in Osogbo, Osun state, Nigeria, as well as Korope transport providers and owners. A sample of 177 respondents was chosen at random. Both inferential and descriptive statistics were used in the data analysis. The findings show that the F test yields asymptotic significance values of 0.000 (less than p value of 0.05) and 54.534 (more than the tabulated f-value of 2.32). Consequently, the null hypothesis is disproved and the alternative is approved. There is evidence to support the effects of connectivity, affordability, dependability, accessibility, and ease of use on intraurban mobility in Osogbo. Korope, or minibuses, are a crucial component of Osogbo, Osun State's public transportation network. Despite their increased security and overall quality, minibuses as a mode of transportation nevertheless have several obvious drawbacks. However, the report recommended that stricter safety regulations be implemented and upheld for minibuses. Frequent car inspections, driver education programs, strict adherence to speed limits and other traffic rules should all be part of these laws.

Construction of a model for data processing in the settlement of the costs of public transport operating in the municipalities of the Upper Silesian Metropolitan Union – part two

Construction of a model for data processing in the settlement of the costs of public transport operating in the municipalities of the Upper Silesian Metropolitan Union – part two

Increasing Community Satisfaction through the Free School Transport Subsidy Program

One form of public service the community needs is transportation services. However, public transportation (city transportation) tends to be abandoned by the public due to the minimal service provided by city transportation operators. Seeing the low and uneven condition of city transportation services influences students who prefer private vehicles to go to school rather than city transportation. Many underprivileged school students need the means to use private vehicles. Besides that, the high use of private vehicles, especially motorbikes, causes increasingly high traffic violations and accidents. Responding to this phenomenon, the Pasuruan Regency Government and the Pasuruan Regency Transportation Service provided free school transportation facilities. In implementing the free school transportation service, its effectiveness needs to be measured using indicators from Law No. 22 of 2009 concerning Road Traffic and Transportation and Minister of Transportation Regulation No. 29 of 2015, which consistof security, safety, comfort, affordability, and equality. , and regularity. Therefore, this research raises a problem formulation regarding the effectiveness of free school transportation services by the Pasuruan Regency Transportation Service. This typeof research is descriptive qualitative, and it was conducted at Free School Transport using questionnaire, observation, and interview data collection techniques. The sampling technique used in this research was incidental. The sample used was 201 free school transportation passengers. Data analysis techniques used in this research include qualitative and descriptive data analysis. From the results of this research, it was concluded that the free school transportation service by the Pasuruan Regency Transportation Service was running well. However, improvements were needed in several aspects that were deemed to be lacking in service.

Modeling External and Empty Freight Truck Trips using Agent-Based Simulation

Modeling external and empty freight trips helps in better planning and scheduling of transportation operations. This can lead to more effective route planning, load consolidation, and overall optimization of transportation networks. In this study external and empty truck trips modeled using Freight Analysis Framework (FAF) and Highway Performance Measurement System (HPMS) data with generating trip outputs from POLARIS agent-based simulation framework. The model then applied to the Austin metropolitan area, Texas, USA. The model estimated single and multi-unit AADT values with 91% and 93.4% accuracy compared with the HPMS volume, respectively. The estimated error – 9% and 6.6% - is due to the shortest path routing that may prefer faster routes on certain highways. Truck trips on large volume links tend to be overestimated while short links underestimate truck trips to some extent.

Macroeconomic determinants of maritime transport development – VAR models for the Polish economy

World trade in goods is largely based on maritime transport. Virtually all groups of goods are transported by sea, from general cargo to heavy machinery, equipment, raw materials, etc. The conducted research is focused both on the impact of maritime transport on the economy and the impact of the economy on maritime transport. Mutual interactions are often emphasized. Hence, the aim of the research conducted in this paper was to determine the impact of fuel prices, economic growth and inflation on the volume of transshipments in Polish seaports. The research was based on GUS data for the years 2000-2023. The VAR models were chosen as the analysis method. The research was conducted for the levels and increments of variables. Although the problems posed were formulated as one-sided, the research tool used allows to verify the two-sided dependencies.This research is relevant by offering a comprehensive examination of how intelligent data analysis can enhance our understanding of complex economic and logistical interactions. The findings provide actionable insights for policymakers and industry stakeholders, suggesting strategies to optimize maritime transport operations and economic planning based on the identified interactions. By integrating advanced modeling techniques with real data, this study contributes to the development of smarter, more efficient information systems in the context of maritime transport and economic analysis.

Route capacity in designing urban public passenger transportation

Public transport is of crucial importance for urban agglomerations - it is the only transport system that can satisfy the mobility of the population with acceptable quality at minimum cost with less negative impact on the environment. In the tasks of designing public transport, ensuring the capacity of the routes is of particular relevance. This problem does not have an unambiguous solution, and in the majority of research, possible excess of capacity of vehicles, as a rule, are ignored. The paper presents the developed mathematical model, which allows us to calculate the highest intensity passenger flow from the transport demand for a day of transport operation and on this basis to determine the necessary throughput capacity at the established limits of rolling stock capacity. An example of calculation of dependence of intensity and interval of movement on nominal capacity of rolling stock is given, in which an example of the performance of restrictions of the capacity of rolling stock is provided on a section of a route with passenger flow of the greatest capacity.

Justification of the design and technological scheme of a new type of machine for applying mineral fertilizers

Annotation Purpose. Rationale for the structural and technological scheme of the transport-technological machine for the application of solid mineral fertilizers, which will ensure the improvement of the quality of the application of mineral fertilizers by stabilizing the dose of their application as the body of the machine is emptied and its annual load increases. Methods. Analysis of known designs of machines for applying solid mineral fertilizers, theoretical based on the laws of mechanics and experimental using standard methods. Results. The structural and technological scheme of a new type of machine for applying mineral fertilizers and dependencies for determining the main parameters and modes of operation of its working bodies are substantiated. Its experimental sample was created, the results of which in the process of laboratory and field studies confirmed the independence of the dose of mineral fertilizers from the filling (emptying) of the car body with mineral fertilizers. In addition, the possibility of using the machine in the operations of transporting loose technological materials and transshipping them to other technical means and stationary capacities, as well as unloading to the site, was confirmed, which ensured an increase in its annual loading by more than 4 times. Conclusions. The creation of body-type machines for applying solid mineral fertilizers according to the principle of transport-technological machines, which include a body equipped with a feeder, a screw conveyor, a hopper with a dispenser and sorting working bodies, ensures: - exclusion of the influence of the degree of filling (emptying) of the body machines with mineral fertilizers for the dose of their introduction; - expansion of the scope of application of the machine thanks to its additional use in transportation operations of loose technological materials and their transshipment into other technical means and stationary capacities, as well as unloading at the site, which in general leads to an increase in its annual loading more than 4 times.