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  • 1
    Online Resource
    Online Resource
    CALCULATION OF DISPLACEMENT WITH DEADWAIGHT USAGE
    Astrakhan State Technical University ; 2018
    In:  Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies
    Details
    In: Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies, Astrakhan State Technical University
    Abstract: When designing the capacity of a ship power plant, displacement is a key parameter both in calculations using the formulas of admiralty coefficients, and using diagrams of model tests. Taking into consideration physical essence of vessel displacement and deadweight, it has been assumed that there is a close correlation between them. On the basis of the analysis of 45 vessels including tankers, gas carriers, transport carriers, transport refrigerators, and 36 fishing vessels there has been carried out the analysis of correlation between deadweight and displacement. Advanced Grapher computer program has been used to reveal correlation between these two parameters, which allows to reveal correlation between two parameters using seven functions: linear, hyperbolic, logarithmic, power, exponential, indicative, and polynomial. All vessels have been divided into four groups: tankers and gas carriers, transport vessels (bulk carriers, motor ships, timber carriers, container ships), transport refrigerators, fishing fleet vessels (supertrawlers, big freezing fishing trawlers, full freezer trawlers, mid-size full freezer trawlers). For each group there was found the best correlation formula describing relation between deadweight and displacement. Following the analyses it has been stated that polynomial function is the best to describe correlation for transport vessels, and power function answers the others. Correlation coefficient values are within R = 0.962 ÷ 0.998. The dependences obtained are quite exact, so they are recommended to use in practice of schematic design of new vessels, and in preparing the final qualification papers for training area 26.00.00 "Technique and technology of shipbuilding and the water transport".
    Type of Medium: Online Resource
    ISSN: 2073-1574 , 2225-0352
    Uniform Title: РАСЧЁТ ВОДОИЗМЕЩЕНИЯ СУДНА ПО ЗНАЧЕНИЮ ЕГО ДЕДВЕЙТА
    URL: Article
    DOI: 10.24143/2073-1574-2018-2-55-61
    Language: English , Russian
    Publisher: Astrakhan State Technical University
    Publication Date: 2018
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  • 2
    Online Resource
    Online Resource
    ESTIMATION OF FUEL AND MOTOR OIL CONSUMPTION BY MARINE DIESELS SUBJECT TO ENVIROMENT CHANGES
    Astrakhan State Technical University ; 2017
    In:  Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies
    Details
    In: Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies, Astrakhan State Technical University
    Abstract: Present methods of fuel and motor oil consumption calculation are executed with assumption that navigation conditions are invariable during the whole voyage. But environmental changes may affect the actual consumption of fuel and motor oil. The most probable range of environment parameter changes makes: environmental temperature -20°C - 40°C, barometrical pressure 660-775 millimeters of mercury, relative air humidity 35-100%, salt-water temperature 5-30°C. The correction of real tests results to standard normal environmental conditions in accordance with GOST R 525217-2005 (ISO 3046-1:2002) has been recalculated. The results of diesel Cummins type KTA G3 test with nominal power Ne = 1227 kW and speed output n =1500 min-1 have been presented. The correction of the results to normal condition for this engine has been made. According to the statistics of atmospheric environment in the port of Vladivostok, specific effective fuel consumption has been calculated. The comparison of real test results and calculation results showed that deviations due to environment change in Vladivostok does not exceed 4.7%. The calculation of fuel consumption changes under extreme environmental conditions has been executed. The proposed method of fuel and motor oil consumption calculation can be applied to standard rates and real consumption during a voyage.
    Type of Medium: Online Resource
    ISSN: 2073-1574 , 2225-0352
    Uniform Title: ОПРЕДЕЛЕНИЕ РАСХОДА ТОПЛИВА И МОТОРНОГО МАСЛА СУДОВЫМИ ДИЗЕЛЯМИ С УЧЕТОМ ИЗМЕНЕНИЯ ВНЕШНИХ УСЛОВИЙ ЭКСПЛУАТАЦИИ
    URL: Article
    DOI: 10.24143/2073-1574-2017-3-62-73
    Language: English , Russian
    Publisher: Astrakhan State Technical University
    Publication Date: 2017
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  • 3
    Online Resource
    Online Resource
    CALCULATING SPECIFIC HEAT OF COMBUSTION PRODUCTS IN GAS MODE DIESEL ENGINES
    Astrakhan State Technical University ; 2019
    In:  Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies
    Details
    In: Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies, Astrakhan State Technical University
    Abstract: The task of using natural gas-engine fuel in transport diesel engines (marine and automobile) is very actual. The trends of converting diesel engines to gas mode on ships of the port fleet and fishing vessels are becoming widespread. The importance to clarify the calculation methods of the working process for gas mode diesel engines is growing. Natural gas has been stated to comprise different gases - methane, ethane, propane, butane, carbon monoxide, etc., the percentage correlations of which being presented. There has been studied the method of calculating heat capacity of “pure” combustion products, i.e. under fuel combustion with excessive air coefficient α =1. The chemical reactions of oxidation elements of gas fuel components during its combustion determine the amount of kilomole of combustion products. To determine the heat capacity of the components of the combustion products - CO2, H2O and N2, the known tables of gases and water vapor properties were used. As a result of data processing, approximating linear and quadratic dependences were obtained. Нeat capacities are calculated in the linear formula of the specific heat of “pure” combustion products as the heat capacity of the gas mixture. As a result, a formula for determining the heat capacity of “clean” combustion products of gas fuel has been obtained: CVG = 25.03 + 0.0065· T . For determining the heat capacity of “clean” combustion products of gas fuel with 10% additive of ignition diesel fuel the formula has the following form CVGZH = 24.57 + 0.006· T . The dependences obtained are fairly accurate and recommended for using in the practice of converting diesel engines to gas-engine fuel, as well as when carrying out works and watercraft technology in building the ships and water transport.
    Type of Medium: Online Resource
    ISSN: 2073-1574 , 2225-0352
    Uniform Title: РАСЧЕТ ТЕПЛОЕМКОСТИ ПРОДУКТОВ СГОРАНИЯ ГАЗОМОТОРНОГО ТОПЛИВА В ДИЗЕЛЯХ
    URL: Article
    DOI: 10.24143/2073-1574-2019-2-48-55
    Language: English , Russian
    Publisher: Astrakhan State Technical University
    Publication Date: 2019
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  • 4
    Online Resource
    Online Resource
    ANALYSIS OF TECHNICAL FAILURES ON FISHING VESSELS IN THE FAR EAST
    Astrakhan State Technical University ; 2019
    In:  Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies
    Details
    In: Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies, Astrakhan State Technical University
    Abstract: The article focuses on the main factors influencing the safety of navigation, such as natural factors, man-made impact, depreciation aspect, operational impact and human factor. The analysis of marine accidents in the far East region determined the value of its technical component. The statistics of the machinery failures on fishing vessels is given. One out of ten accidents has been stated to occur as a result of force majeure events, three quarters of the accidents are related to the human factor in the form of personnel erroneous actions, the rest happen due to technical imperfection of the ships. The chart shows the distribution of accidents by years due to failures and breakdowns of ship technical equipment given in percentage figures. Breakdowns of the main engines, auxiliary mechanisms and their elements, including their systems, annually make up 33.9 - 40.7% of the total number of accidents. Characteristic failures of ship technical equipment are: breakdowns of the main engines, auxiliary diesel generators, auxiliary mechanisms, electrical equipment, screw-steering complex with the shaft line, automation systems. Statistics of the causes of breakdowns of propulsion plant, auxiliaries, main systems and their elements is proportional to the data of similar studies. An attempt has been made to evaluate the importance of the operator-machine link at all levels of responsibility for coastal personnel and ship crews. The impact on the man-machine link in the whole chain of operation of the vessel is important; thus, there was set a task to carry out a quantitative investigation of the reliability of this link. In terms of the ergotechnical component of the fishing fleet operation there has been substantiated the necessity of developing measures (technical, economic, informational, legal) to improve the quality of the vessel activity.
    Type of Medium: Online Resource
    ISSN: 2073-1574 , 2225-0352
    Uniform Title: АНАЛИЗ ТЕХНИЧЕСКИХ ОТКАЗОВ НА ПРОМЫСЛОВЫХ СУДАХ В ДАЛЬНЕВОСТОЧНОМ РЕГИОНЕ
    URL: Article
    DOI: 10.24143/2073-1574-2019-3-48-55
    Language: English , Russian
    Publisher: Astrakhan State Technical University
    Publication Date: 2019
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