scholarly journals Resistance of Repaired Pipeline Transport Systems to Damage to Network Structure Elements

2021 ◽  
Vol 132 (1) ◽  
pp. 41-47
Author(s):  
I. A. Tararychkin ◽  
Keyword(s):  
Current System ◽  
Resistance Index ◽  
Transport Systems ◽  
Quantitative Composition ◽  
Progressive Damage ◽  
Network Structures ◽  
Pipeline Transport ◽  
Repair Work ◽  
Structural Applications ◽  
Linear Elements

It is shown that the set of all linear elements of the system can be divided into 5 subsets G1...G5, depending on which specific nodes a particular pipeline connects. It was established that the greatest influence on the growth of resistance index values is exerted by the effect of an increase in the quantitative composition of the subset G1, and the smallest one is the increase in the composition of the subset G5. In this case, the degree of influence decreases with the transition from the elements of the subset G1 to G5. During repair operations, individual fragments or pipelines are usually excluded from the current system. Such structural applications can lead to a situation where accidental damage to several or even one pipeline will lead to disconnection of some consumers from the source. The specified feature should be taken into account when planning, preparing and conducting repair work. The existence of rational and irrational network structures, characterized by the greatest and least resistance to progressive damage, is proved. The planning and organization of repair work of pipeline transport systems is recommended to be carried out with a preliminary assessment of their resistance to progressive damage and taking into account the possibility of using rational network structures.

scholarly journals Specificity of the development and characteristics of mixed damage to network structures of pipeline transportation systems

Dependability ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 4-11
Author(s):  
I. A. Tararychkin
Keyword(s):  
Emergency Situation ◽  
Random Order ◽  
Transportation Systems ◽  
Pipeline System ◽  
Progressive Damage ◽  
Network Structures ◽  
Pipeline Transportation ◽  
Pipeline Systems ◽  
Linear Elements ◽  
Correct Comparison

Pipeline transportation systems are used in various industries for the purpose of delivering various substances and materials to consumers. If, as the result of an accident development, a certain number of random linear elements (pipelines) consecutively fail, such scenario of events is called progressive damage. If several pipelines converging at a node fail simultaneously, such point element of the system is blocked. Progressive blocking of a certain set of nodes of a pipeline system in random order is called a progressive blocking. Simultaneous development within a system of progressive damage to linear elements and blocking of transportation nodes represents mixed damage. Mixed damage is a hazardous form of emergency, and its development causes fast degradation of a system’s transportation capabilities.The Aim of the paper is to study the characteristic properties and patterns of the progress of mixed damage affecting network structures of pipeline systems, as well as evaluating such systems’ capability to resist its development.Methods of research. The characteristics of network entities’ resilience to the development of mixed damage were identified by means of computer simulation. The nature of the effects to which a system is exposed was defined with a cyclogram, whose integer parameters indicate the alternation of the process of sequential damage of linear elements and nodes of a network structure.Results. It has been established that a correct comparison of the resilience of various network structures to mixed damage is only possible with regard to comparable facilities. For that purpose, the analyzed systems must have identical numbers of nodes, linear elements and end product consumers. Additionally, such systems must be exposed to effects with identical cyclograms. It is shown that the correlation of the resilience of comparable network structures does not depend on the specific type of mixed damage cyclogram, but is defined by the nature of the connections within a particular system.Conclusions. Mixed damage is a hazardous development scenario of an emergency situation that is associated with rapid degradation of the transportation capacity of pipeline systems. The ability of network structures of pipeline systems to resist mixed damage is evaluated based on indicators that are defined by means of simulation. A correct comparison of the resilience of various structures to mixed damage is only possible in case they are comparable. For that purpose, they must have identical numbers of nodes, linear elements and product consumers. Additionally, such systems must be exposed to damage procedures with identical cyclograms. The correlation of the resilience of network structures that comply with the comparability conditions does not depend on the adopted damage cyclogram, but is defined by the existing set of connections within a particular system.

scholarly journals Specificity of the development of the damage process to network structures of pipeline transportation systems

Dependability ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 9-16
Author(s):  
I. A. Tararychkin
Keyword(s):  
Network Structure ◽  
Limit State ◽  
Transportation Systems ◽  
Pipeline System ◽  
Progressive Damage ◽  
Network Structures ◽  
Pipeline Transportation ◽  
Linear Elements ◽  
System Resilience ◽  
Maintenance Activities

Introduction. Industrial pipeline transportation systems are complex, potentially hazardous engineering facilities that ensure the delivery of specified amounts of a target product to consumers. The development of emergencies associated with the transition to the down state of a certain number of pipelines may result in the disconnection of some or all the product consumers from the source. If the system’s linear elements transition to the down state in a random order, such a change of the network structure is called a progressive damage. A progressive damage is especially hazardous if, in the course of maintenance activities, a part of the system or a set of process pipelines is disconnected.The Aim of the work is to identify the change patterns of pipeline system resilience when affected by progressive damage and to develop practical recommendations for ensuring the resilience of such systems in operation and during maintenance operations.Methods of research. The resilience of systems as the capability to resist progressive damage was evaluated with an indicator that represents the average fraction of pipelines whose transition into the down state causes the disconnection of all consumers from the source of the product. The resilience values were defined by means of computer simulation. The network structure and the nature of the existing intersystem communications were defined using an adjacency matrix.Results. Damage to a transportation network structure is regarded as a result of a two-stage process. At the stage of target transformation, linear elements are purposefully excluded from a full graph-based structure, bringing the network to a certain initial state. At the second stage, the original structure is transformed according to the mechanism of progressive damage. Such approach allows correctly assessing the changes in the resilience of complex network structures and their ability to resist the development of the processes of damage. The paper sets forth calculated characteristics that allow predicting the behaviour of pipeline networks affected by emergencies. The existence of limit network structures is demonstrated that prove to be very vulnerable to the development of progressive damage.Conclusions. As the process of targeted transformation goes on, the ability of newly formed network structures to resist the development of progressive damage progressively diminishes. The lowest level of pipeline system resilience against the development of the process of progressive damage can be observed as the structure of the network nears the limit state. When preparing maintenance activities with scheduled exclusion of a number of linear elements from an active pipeline system, the proximity of the newly built network structure to the limit state should be assessed along with the resilience of the restored system to possible development of progressive damage.

Experimental study of the transmission of energy of a microwave electromagnetic field into the oil environment employing a submersible emitter

2021 ◽  
pp. 120-129
Author(s):  
A. F. Sekachev ◽  
V. V. Shalai ◽  
Yu. D. Zemenkov ◽  
A. F. Fitzner ◽  
A. E. Yakovlev
Keyword(s):  
Experimental Study ◽  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
Thermal Process ◽  
Oil Industry ◽  
Coaxial Cable ◽  
Transport Systems ◽  
Thermal Imager ◽  
Pipeline Transport ◽  
Optically Transparent

The supply of heat to oil media pumped by pipeline transport systems is one of the main problems in the oil industry. The article describes a method for supplying heat to oil-containing media using the energy of an electromagnetic field. The possibility of releasing surfaces in contact with oil sludge under the influence of electromagnetic fields has been shown by experiment. We describe the design and parameters of a biconical horn radiator of a microwave electromagnetic field operating at a frequency of 2 450 MHz. A method for generating energy and transmitting it to the emitter by means of a coaxial cable is shown. Testing the emitter in oil placed in an optically transparent and radio-tight double-walled tank is presented. The design of the stand allows us to safely examine the thermal process using a thermal imager. The installation made it possible to heat 7 liters of oil at 15 °C in 12 minutes.

scholarly journals Application of intelligent systems in transport

2019 ◽  
Vol 20 (3) ◽  
pp. 236-243
Author(s):  
Irina M. Popova ◽  
Sergey V. Timofeev ◽  
Igor K. Danilov
Keyword(s):  
Fuel Consumption ◽  
Intelligent Systems ◽  
Transport Systems ◽  
Railway Transport ◽  
Intelligent Transport Systems ◽  
Repair Work ◽  
Intelligent Transport ◽  
Operational Life ◽  
Transport Safety ◽  
Accounting Control

The article discusses the application of intelligent transport systems for railway transport. The purpose of developing intelligent transport systems on railway transport is to strictly comply with the requirements for ensuring transport safety, reducing the level of environmental impact, significantly improving the efficiency of production activities. The software makes automatic accounting, control and analysis of fuel and energy resources consumption on the basis of the obtained data. At the same time, the dynamics of changes in fuel consumption indicators, actual and estimated costs of diesel fuel are visually reflected in real time on the monitor screen. If necessary, the system will help to identify the reasons for non-matching of these parameters and quickly contact the locomotive team to provide qualified assistance in their elimination. It is important that the hardware structure and the structure of the system software expand functionality, providing continuous operation and repair work, increasing the number of measured parameters, creating a closed fuel consumption control system in a locomotive economy. The use of these systems makes it possible to obtain an integrated assessment of the heat engineering condition of a locomotive with further scientifically substantiated correction of overhaul runs, to control its location and solve many other problems, which contributes to an increase in overhaul runs and the operational life of the locomotive.

scholarly journals “...TEACHERS WORK ENTHUSIASTICALLY AND HAVE NO COMPLAINTS...”: ETHNOGRAPH M. N. KHANGALOV IN THE SERVICE OF EDUCATION

2021 ◽  
Vol 2 ◽  
pp. 20-27
Author(s):  
Zhukova Natalya E. ◽  
◽  
Palkhaeva Elizaveta N. ◽  
Palikova Tatyana V. ◽  
◽  
...  
Keyword(s):  
Educational Activity ◽  
Rural Life ◽  
Quantitative Composition ◽  
Daily Routine ◽  
Educational Facilities ◽  
Repair Work ◽  
Famous Scientist ◽  
The Third ◽  
Shed Light

The article presents to the reader’s attention the famous scientist-ethnographer Mat-vey Nikolaevich Khangalov as an enthusiastic, talented teacher. The key source for the analysis and description of Khangalov’s activities as the head of the Bilchir School was his diary of 1910–1911. It is divided into three parts: the first is devoted to the description of shamanic rituals, the second is an illustration of school daily routine, the third is a demonstration of fragments of rural life in Bilchir village. The description of school daily routine included various issues of the educa-tional process from problems with the schedule to repair work. Diary shed light on the small number and poor qualification of teachers, the mobility of the quantitative composition of pupils, the constant shortage of educational facilities and their actual unsuitability, which significantly complicated the work of Matvey Nikolaevich. In conclusion, we come to the conclusion that educational activity was M. N. Khangalov’s lifework.

scholarly journals The development of a performance measurement system for the South African container shipping industry

2012 ◽  
Vol 6 (1) ◽  
Author(s):  
Taryn Hector ◽  
George Ruthven
Keyword(s):  
South African ◽  
Measurement System ◽  
Distribution System ◽  
Current System ◽  
Transport Systems ◽  
Performance Measurement System ◽  
Air Distribution ◽  
Container Shipping ◽  
Shipping Industry ◽  
A Performance

Globalisation is dependent on efficient supply chains and a variety of transport systems. South Africa participates in the world’s economy with an extensive container shipping industry, as well as a road/rail/air distribution system. One of the aims of this research study was to develop a measurement system, or model, that may assist in measuring the performance of a container shipping service, from the time a ship arrives in the harbour, through the process in the container depot until the container arrives at the final customer for imports, and the other way round for exports. The objective was to develop a performance index that would assist management in assessing and/or improving the current system. It is a global phenomenon that inefficiencies cannot be eliminated by a single organisation; it requires the cooperation of all the parties in a supply chain.

Carbon dioxide transport pipeline systems: overview of technical characteristics, safety, integrity and cost, and potential application of digital twin

2021 ◽  
pp. 1-41
Author(s):  
Ahmad Sleiti ◽  
Wahib Al-Ammari ◽  
Ladislav Vesely ◽  
Jayanta Kapat
Keyword(s):  
Carbon Dioxide ◽  
High Reliability ◽  
Systems Design ◽  
Data Driven ◽  
Transport Systems ◽  
Transport Sector ◽  
Future Research ◽  
Pipeline Transport ◽  
Carbon Dioxide Transport ◽  
Co2 Transport

Abstract Carbon dioxide transport from capture to utilization or storage locations plays key functions in carbon capture and storage systems. In this study a comprehensive overview and technical guidelines are provided for CO2 pipeline transport systems. Design specifications, construction procedures, cost, safety regulations, environmental and risk aspects are presented and discussed. Furthermore, challenges and future research directions associated with CO2 transport are sorted out including the large capital and operational costs, integrity, flow assurance, and safety issues. A holistic assessment of the impurities' impacts on corrosion rate and phase change of the transported stream is required to improve pipeline integrity. The influence of impurities and the changes in elevation on the pressure drop along the pipeline need to be further investigated to ensure continuous flow via accurate positioning of pumping stations. Although the long-experience in oil and gas pipeline industry forms powerful reference, it is necessary to develop particular standards and techno-economic frameworks to mitigate the barriers facing CO2 transport systems. Digital twins (DT) have potential to transform CO2 transport sector to achieve high reliability, availability and maintainability at lower cost. Herein, an integrated 5-component robust DT framework is proposed for CO2 pipeline transport systems and the future directions for DT development are insinuated. Data-driven-algorithms capable of predicting system's dynamic behavior still need to be developed. The data-driven approach alone is not sufficient and low-order physics based models should operate in tandem with the updated system parameters to allow interpretation and result's enhancing. Discrepancies between dynamic-system-models, anomaly-detection and deep-learning require in-depth localized off-line simulations.

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