Materials and Methods of Experimental Studies of Welded Metal Structures of Construction Machines

Scherbakov, Alexander; Babanina, Anna; Solovyeva, Elena; Aleksandrovskiy, Maxim

doi:10.1007/978-981-33-6208-6_57

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…For Krasnoyarsk passenger transport at the average coefficient of hourly irregularity of passenger flows (kp), equal to 1.8, and transport movement time of 18 hours a day, the average operating time of rolling stock on the routes should not be less than 10 hours. Otherwise, between-peak times will not provide the rolling stock capacity and the intensity of passenger flows: on the busiest sections of the route network there will be an excess of the nominal (standard) capacity of the vehicle cabins [8][9][10].…”

Section: Methodsmentioning

confidence: 99%

Retracted Article: Calculation of maximum allowable capacity coefficient for urban passenger transport

Scherbakov

Пушкарев²,

Kuzmin³

et al. 2023

E3S Web Conf.

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One of the most important indicators of the quality of transport services to the population is the coefficient of the use of rolling stock capacity. This parameter directly affects economic efficiency of the transport organization: the carrier is concerned with the highest value of the capacity utilization coefficient. The passenger, on the contrary, prefers service without overcrowding of the rolling stock. In practice, the average coefficient of dynamic capacity utilization for the relevant period is calculated, which is used in determining passenger fares, the analysis of the performed traffic in terms of available reserves of carrying capacity, planning of the transportation process. The paper considers the methodology of calculating the maximum permissible value of the coefficient of capacity utilization, on the basis of ensuring the normal occupancy of the cabin throughout the routes during the entire period of transport movement. The solution to determine the maximum permissible occupancy of rolling stock at work on regular city routes is offered, the task on the basis of analysis of dependence of the factor of use of capacity from parameters of passenger flows, average time of work of rolling stock on the route and non-uniformity of speed of communication during the work of passenger transport is offered. It was proposed to estimate the fluctuations of the communication speed during the movement of urban passenger transport by means of the coefficient of non-uniformity of the communication speed. It is established that the coefficient of using the rolling stock capacity depends substantially on the parameters of passenger flows, the average operating time of the rolling stock on the route and the unevenness of the speed of communication during the period of transport operation.The obtained dependencies make it possible to calculate the maximum permissible value of the capacity factor, taking into account the parameters of the planned transport process. Depending on the operating conditions, the capacity utilization factor varies within a significant range from 0.2 to 0.4.

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Section: Methodsmentioning

confidence: 99%

Retracted Article: Calculation of maximum allowable capacity coefficient for urban passenger transport

Scherbakov

Пушкарев²,

Kuzmin³

et al. 2023

E3S Web Conf.

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“…Широкое распространение получил метод ТЦО материалов и их сварных соединений. Теоретические основы данного метода изложены в работах [14,15,16]. Отечественная и зарубежная техническая литература, посвященная прикладному применению данного направления, достаточно обширна.…”

Section: Introductionunclassified

Replacement working body material as a way to increase reliability of road construction machines

2022

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Introduction. On the example of a motor grader knife, ways of increasing the reliability of road construction machines (RCM) operation are evaluated. For this purpose, the analysis of force effects nature on the working body of the RCM is carried out and its design features are highlighted (the presence of a welded joint). Based on the analysis, the range of characteristics necessary for making a decision on the possibility of replacement the material of the RCM working body is determined. Additionally, its thermocyclic treatment (TCT) is carried out. Experimental studies of the effect of this thermal impact type on the structure and properties of steels are described.Materials and methods. With the help of metallographic analysis, the author investigates the influence of the number of thermal effects cycles on the grain size and the complex of various materials physical and mechanical characteristics of road construction machines working body at various stages of the thermocyclic treatment.Results. It is determined that an increase in the level of the investigated steels physical and mechanical characteristics is possible through the use of TCT due to the obtaining of a fine-grained metal structure. The dependences of the main physical and mechanical characteristics of the investigated steels (ultimate strength and yield strength) on the number of thermal effects cycles are considered. Correlation relationships are selected to describe these dependencies. The relationship between the yield strength and ultimate strength of 09G2S and 30MnB5 steels and the grain size is considered. In addition, studies of the steels fatigue characteristics are carried out; data on determining the microhardness are presented for the welded joint. For various operating temperatures, fractographic studies are carried out on samples after cyclic loading.Discussion and conclusion. Based on a comparative analysis of the complex of physical and mechanical characteristics, the author made a conclusion about the possibility of replacing steel 09G2S with steel 30MnB5.

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Experimental Studies of the Effect of Heat Treatment on the Properties of Welded Assemblies of Working Bodies of Road Construction Machines

Scherbakov

Vinogradova

Петров

et al. 2022

Lecture Notes in Networks and Systems

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Materials and Methods of Experimental Studies of Welded Metal Structures of Construction Machines

Cited by 6 publications

References 4 publications

Retracted Article: Calculation of maximum allowable capacity coefficient for urban passenger transport

Retracted Article: Calculation of maximum allowable capacity coefficient for urban passenger transport

Replacement working body material as a way to increase reliability of road construction machines

Experimental Studies of the Effect of Heat Treatment on the Properties of Welded Assemblies of Working Bodies of Road Construction Machines

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