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IMPACT ANALYSIS OF MICRO-JET COOLING FOR STRESS CONCENTRATION IN A CRANE BUMPER DURING A COLLISION 微射流冷却对起重机保险杠碰撞应力集中的影响分析
IF 0.7
Transport Problems Pub Date : 2023-06-30 DOI: 10.20858/tp.2023.18.2.09
T. Haniszewski, T. Wȩgrzyn, B. Szczucka-Lasota
{"title":"IMPACT ANALYSIS OF MICRO-JET COOLING FOR STRESS CONCENTRATION IN A CRANE BUMPER DURING A COLLISION","authors":"T. Haniszewski, T. Wȩgrzyn, B. Szczucka-Lasota","doi":"10.20858/tp.2023.18.2.09","DOIUrl":"https://doi.org/10.20858/tp.2023.18.2.09","url":null,"abstract":"In the structure of crane bumpers, there is a need to join various types of steel. Usually, low-alloy steel structures are used for this purpose, which can be represented by S355J2 steel. The tensile strength of S355J2 low-alloy steel is slightly below 600 MPa, and the tensile strength of S355J2 steel is at the high level of 200 J at ambient temperature. The impact strength of this steel in negative temperatures is also good at over 47 J at -60 °C, so it meets the 6th class of impact toughness. Welding structures, after classic gas metal arc welding (GMAW) processes, meet only the second impact toughness class. An improved GMAW process was used by micro-jet cooling application to raise the mechanical properties of the joints. The microstructure and main properties of the joints were carefully analyzed. The influence of using the new suggested welding process on the various properties of the welds is presented (UTS – ultimate tensile strength, YS – yield strength, Poisson ratio, elongation, Young’s modulus). Then, the effects of tests for use in crane bumper construction were checked by using a hybrid finite element method (FEM) analysis.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43084893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PRECISION DIAGNOSTICS OF A DIESEL ENGINE UNDER AGRICULTURAL TRACTOR OPERATING CONDITIONS 农用拖拉机工况下柴油机的精确诊断
IF 0.7
Transport Problems Pub Date : 2023-06-30 DOI: 10.20858/tp.2023.18.2.16
O. Vrublevskyi, J. Gonera, J. Napiórkowski
{"title":"PRECISION DIAGNOSTICS OF A DIESEL ENGINE UNDER AGRICULTURAL TRACTOR OPERATING CONDITIONS","authors":"O. Vrublevskyi, J. Gonera, J. Napiórkowski","doi":"10.20858/tp.2023.18.2.16","DOIUrl":"https://doi.org/10.20858/tp.2023.18.2.16","url":null,"abstract":"This paper presents a method for the precise diagnosis of a diesel engine in an agricultural tractor based on the analysis of efficiency changes and parameters characterizing the process of fuel-air mixture preparation. We proposed that the technical condition be identified based on available data from the engine controller, as this enables the implementation of precise online diagnostics of an agricultural tractor. The method was verified using the original cycle, during which we simulated several engine defects leading to a change in conditions and quality of the processes of creating and burning the fuel/air/flue gas mixture. In the paper, we justified the selection of the points at which the engine parameters were measured, as they provide the most information and allow for efficient identification of damage. These results indicate the possibility of damage identification without the use of the diagnostic cycle in the operation of operator-driven vehicles and autonomous vehicles.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43286983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NEW FUNCTIONALITIES OF THE WEIGH-IN-MOTION SYSTEM: iWIM SOLUTION 运动称重系统的新功能:iWIM解决方案
IF 0.7
Transport Problems Pub Date : 2023-06-30 DOI: 10.20858/tp.2023.18.2.14
A. Konior, T. Konior, K. Brzozowski, A. Maczyński, Artur Ryguła
{"title":"NEW FUNCTIONALITIES OF THE WEIGH-IN-MOTION SYSTEM: iWIM SOLUTION","authors":"A. Konior, T. Konior, K. Brzozowski, A. Maczyński, Artur Ryguła","doi":"10.20858/tp.2023.18.2.14","DOIUrl":"https://doi.org/10.20858/tp.2023.18.2.14","url":null,"abstract":"This paper presents new functionalities for systems weighing vehicles in motion, which result from the integration of various measurement technologies and the use of a precise registration and data processing system. The utilized registration track provides accurate measurements of basic vehicle parameters such as axle load and vehicle speed and makes it possible to determine the location of the vehicle passing the weighing station, calculate the width of the tire tread, and detect twin (double) wheels. A key functionality is the assessment of the reliability of the measurement, taking into account, among other factors, vehicle movement dynamics and the ambient conditions during the measurements. For this purpose, additional measurements of road surface temperature and wind speed and direction were introduced. The technological solutions used and the proprietary data processing algorithms are described. Tests carried out to verify the effectiveness of the proposed algorithms and to assess the significance of the influence of the isolated factors permitted confirmation of the validity of the proposed solutions.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44419754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ENGINE FLEXIBILITY FOR SI ENGINES FUELED BY LIQUID GAS WITH DIMETHYL ETHER BLEND 发动机灵活性的硅发动机燃料的液体气体与二甲醚混合物
IF 0.7
Transport Problems Pub Date : 2023-06-30 DOI: 10.20858/tp.2023.18.2.01
P. Fabiś
{"title":"ENGINE FLEXIBILITY FOR SI ENGINES FUELED BY LIQUID GAS WITH DIMETHYL ETHER BLEND","authors":"P. Fabiś","doi":"10.20858/tp.2023.18.2.01","DOIUrl":"https://doi.org/10.20858/tp.2023.18.2.01","url":null,"abstract":"The aim of the study is to present the changes in the vehicle dynamics that occur in connection with the use of various fuels that power the engine. The article presents the effect of gaseous fuels being mixtures of LPG and BioDME on the flexibility of the vehicle. In previous studies, not much attention has been paid to the problem of changing the performance of the vehicle with the use of various fuels supplying the engine. It is a new approach that allows to determine the advantages and disadvantages of using alternative fuels, including mixtures using BioDME. The study was conducted for a four-cylinder SI engine with a displacement of 1.6 dm3, installed in a passenger vehicle. The mixture of LPG and DME was assessed, and the results compared to the parameters obtained for the LPG-powered engine. Received results have been made it possible to determine changes in the value of the engine flexibility for selected engine loads and various DME shares in the mixture. The thesis that DME can be considered as an activator of the combustion process and may have an impact on the vehicle dynamics is confirmed.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48080252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
OCTAVE BAND ANALYSIS OF CAR NOISE EMISSIONS AT DIFFERENT SPEEDS AND ON DIFFERENT PAVEMENTS 不同车速和不同路面汽车噪声排放的倍频程分析
IF 0.7
Transport Problems Pub Date : 2023-06-30 DOI: 10.20858/tp.2023.18.2.06
G. Staneva, R. Ivanov, G. Kadikyanov
{"title":"OCTAVE BAND ANALYSIS OF CAR NOISE EMISSIONS AT DIFFERENT SPEEDS AND ON DIFFERENT PAVEMENTS","authors":"G. Staneva, R. Ivanov, G. Kadikyanov","doi":"10.20858/tp.2023.18.2.06","DOIUrl":"https://doi.org/10.20858/tp.2023.18.2.06","url":null,"abstract":"Noise from cars is one of the main sources of harmful pollution. In the presented paper, an octave frequency band analysis is conducted according to standard methods of external and internal noise measurement. Experiments at different speeds, with three types of cars—conventional gasoline (GV), hybrid (HEV) and pure electric (BEV)— were carried out on two types of pavement—damaged coarse-grained and smooth finegrained asphalt. The results show variations in external and internal noise levels vs. speed in different octave bands. At each speed, a spectral analysis was done. The diagrams with results show changes in noise level vs. speed and the positions of noise maximums. Regression models for the octave spectrum at different speeds and pavements are developed.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48246340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
THE EFFECT OF TRAM MANAGEMENT ON ROAD TRAFFIC FLUIDITY AND ITS INFLUENCE ON DRIVERS’ BEHAVIORS AT A CRITICAL JUNCTION IN ALGERIA 阿尔及利亚关键路口有轨电车管理对道路交通流动性的影响及其对驾驶员行为的影响
IF 0.7
Transport Problems Pub Date : 2023-06-30 DOI: 10.20858/tp.2023.18.2.03
M. Khelf, S. Boukebbab, N. Bhouri
{"title":"THE EFFECT OF TRAM MANAGEMENT ON ROAD TRAFFIC FLUIDITY AND ITS INFLUENCE ON DRIVERS’ BEHAVIORS AT A CRITICAL JUNCTION IN ALGERIA","authors":"M. Khelf, S. Boukebbab, N. Bhouri","doi":"10.20858/tp.2023.18.2.03","DOIUrl":"https://doi.org/10.20858/tp.2023.18.2.03","url":null,"abstract":"This research paper aims to study the effect of tram management on traffic fluidity and its impact on car drivers’ behaviors at junctions crossed by trams. The methodology used in this research is based on a mathematical model and an investigation of car drivers. The first step is to analyze the data of annual travelers’ attendance and assess the number of trams offered and needed in operation to respond adequately to the factual demand. The second step proceeds to show how the previous results of the trams’ fleet influence traffic jams. That is, this step identifies how the number of trams used in operation blocks other motorists and reduces traffic flow capacity at junctions. Finally, the purpose of the questionnaire is to determine car drivers’ opinions of the causes of traffic congestion at junctions and understand how this phenomenon affects their behaviors. The outcomes demonstrate that tram management is ineffective because there is a considerable gap between the annual offered tram fleet and the actual one needed according to the real statistical data. The high number of trams utilized is the leading cause of traffic congestion. Furthermore, this situation disturbs the control of traffic lights at common intersections. Unfortunately, this outcome is the main reason for drivers’ poor behavior, as 75.20% of car drivers are always stressed. These issues have intensified traffic jams in several junctions along the tram line. The article recommends some solutions to improve tram management and traffic fluidity to avoid the substandard behavior of car drivers at junctions.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41921888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
AN ALGORITHM FOR GARBAGE TRUCK ROUTING IN CITIES WITH A FIXATION ON CONTAINER FILLING LEVEL 考虑集装箱装卸量的城市垃圾车路径算法
IF 0.7
Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.07
M. Oliskevych, Victor Danchuk
{"title":"AN ALGORITHM FOR GARBAGE TRUCK ROUTING IN CITIES WITH A FIXATION ON CONTAINER FILLING LEVEL","authors":"M. Oliskevych, Victor Danchuk","doi":"10.20858/tp.2023.18.1.07","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.07","url":null,"abstract":"An algorithm for optimizing the routes of a set of vehicles used for the collection and removal of municipal solid waste in a metropolis is proposed. The algorithm eliminates the problem of applying heuristic methods for multi-agent optimization, which is NP non-deterministic polynomial-time-hard. The application of the algorithm leads to a guaranteed exact solution. Through the application of restrictions on the carrying capacity of vehicles, the size of the input matrix representing the transport network can be reduced to an adequate size. This process uses statistical information about the filling levels of container waste bins. The algorithm is applied to an example of two megacities. The shortest routes are built for different numbers of points (from 12 to 72) on the route. The dependence of the total mileage on the number of involved vehicles is studied.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41783709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ASSESSMENT OF THE APPLICABILITY OF BASALT FIBER-REINFORCED EPOXY COMPOSITES IN VEHICLE CONSTRUCTION 玄武岩纤维增强环氧树脂复合材料在汽车结构中的适用性评价
IF 0.7
Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.04
J. Ćwiek, Ł. Wierzbicki
{"title":"ASSESSMENT OF THE APPLICABILITY OF BASALT FIBER-REINFORCED EPOXY COMPOSITES IN VEHICLE CONSTRUCTION","authors":"J. Ćwiek, Ł. Wierzbicki","doi":"10.20858/tp.2023.18.1.04","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.04","url":null,"abstract":"This article presents a description of the properties of basalt fibers and polymer composites containing basalt fibers. Basalt fibers are seen as a potentially beneficial component in composite development, especially for vehicles in transport applications. The article also presents the results of the mechanical properties investigation of the glass-epoxy and basalt-epoxy composites. The composites for testing were prepared using the popular hand lay-up method. The samples were cut from prepared plates using abrasive water jet methods. The obtained samples were tested to evaluate their flexural strength and interlaminar sharing strength. The achieved mechanical properties were compared.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48472194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CHANGES IN THE PERCEPTION OF TELEMATICS TECHNOLOGY BY ROAD TRANSPORT COMPANIES: AN EMPIRICAL ANALYSIS IN 2020-21 道路运输公司对远程信息处理技术感知的变化:2020-21年的实证分析
IF 0.7
Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.01
W. Zalewski, M. Osińska, Mirosława Żurek
{"title":"CHANGES IN THE PERCEPTION OF TELEMATICS TECHNOLOGY BY ROAD TRANSPORT COMPANIES: AN EMPIRICAL ANALYSIS IN 2020-21","authors":"W. Zalewski, M. Osińska, Mirosława Żurek","doi":"10.20858/tp.2023.18.1.01","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.01","url":null,"abstract":"We present a novel study concerning the attitudes of road transport enterprises towards a broad application of telematics in operational management in road transportation. The study aims to assess telematics application in road transport and its changes over time while showing the factors most likely to determine the systems’ use. Unobserved categories defined in the technology acceptance model (TAM) are adjusted to measure perceived usefulness, perceived ease of use, and attitudes toward using telematics systems by road transport managers. The study is based on 323 transport enterprises analyzed in two waves in 2020 and 2021. The use of two different time points is motivated by an observed increase in the digitalization of transport documents caused by the COVID-19 pandemic. The empirical findings support the TAM’s usefulness in evaluating IT in transport business management. The findings also reveal that the significantly increased telematics use in 2020 was observed while it was endured. The results are checked for robustness and used for simulations. The study compares managers’ behaviors over time and simulates the effect of individual (observed) variables on unobserved TAM categories.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45597589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ALGORITHM FOR THE EXTRACTION OF SELECTED RAIL TRACK BALLAST DEGRADATION USING MACHINE VISION 基于机器视觉的轨道道碴劣化提取算法
IF 0.7
Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.11
P. Lesiak, P. Bojarczak, Aleksander Sokołowski
{"title":"ALGORITHM FOR THE EXTRACTION OF SELECTED RAIL TRACK BALLAST DEGRADATION USING MACHINE VISION","authors":"P. Lesiak, P. Bojarczak, Aleksander Sokołowski","doi":"10.20858/tp.2023.18.1.11","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.11","url":null,"abstract":"A number of physical methods are used to survey railway track ballast to assess its degradation as a function of deposition. Simulation tests on track models are also conducted. These testing methods, which are generally labour-intensive and expensive, provide an accurate understanding of the extent of ballast degradation. However, the impact of inadequate maintenance can be observed, even on the surface. Therefore, it seems natural in this case to use image registration. State-of-the-art machine vision systems of track geometry cars provide the means to do this. Obtained ballast images provide a baseline for evaluating its level in relation to sleepers. However, no information is available on other signs of track degradation, such as overgrown vegetation (weeds) or the so-called local muddy areas, which are generally a consequence of poor drainage and a lack of subgrade insulation. These degradations are observed to generate distinctive colour images that are superimposed on the overall image of the ballast surface. They differ in colour and shape. Hence, the authors used this phenomenon to develop an algorithm for the extraction of ballast degradation images based on RGB imaging. Surface descriptors have also been offered to assess these degradations. Extensive measurement material from the railway lines was used to conduct survey experiments based on the examples. The results clearly demonstrate the high success rate of the applied method.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46911677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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