Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-115-119
A. Andreev
Object and purpose of research. This paper presents analytical estimates for emission characteristics of foreign low-probability-of-intercept (LPI) radars. It also gives a quantitative assessment to the possibility of detecting the operation of these radars by standard naval EW tools. Subject matter and methods. This paper reviews the publications of leading foreign experts in order to analyse performance parameters of existing foreign LPI radars and ESM tools. Emission characteristics of these “stealthy” radars in marine conditions were calculated by means of the four-beam model of electromagnetic wave scattering over an underlying surface developed by Krylov State Research Centre researchers. Main results. The study yielded a quantitative estimate for the possibility to detect the emission of radar homing head for RBS-15 anti-ship missile by standard naval tools of radioelectronic surveillance. Conclusion. The study has shown that ESM tools currently available with foreign navies cannot reliably detect the operation of LPI radars.
{"title":"Naval LPI radars: ways to detect their operation","authors":"A. Andreev","doi":"10.24937/2542-2324-2022-4-402-115-119","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-115-119","url":null,"abstract":"Object and purpose of research. This paper presents analytical estimates for emission characteristics of foreign low-probability-of-intercept (LPI) radars. It also gives a quantitative assessment to the possibility of detecting the operation of these radars by standard naval EW tools. Subject matter and methods. This paper reviews the publications of leading foreign experts in order to analyse performance parameters of existing foreign LPI radars and ESM tools. Emission characteristics of these “stealthy” radars in marine conditions were calculated by means of the four-beam model of electromagnetic wave scattering over an underlying surface developed by Krylov State Research Centre researchers. Main results. The study yielded a quantitative estimate for the possibility to detect the emission of radar homing head for RBS-15 anti-ship missile by standard naval tools of radioelectronic surveillance. Conclusion. The study has shown that ESM tools currently available with foreign navies cannot reliably detect the operation of LPI radars.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44790373","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-141-156
V. Magarovsky, V. Polovinkin, A. Pustoshny, O. Savchenko
Object and purpose of research. This paper is intended to analyse new provisions of IMO policy towards reduction of greenhouse gas emission from international ship traffic, as well as Russian and EU documents governing the environmental policy in the marine industry towards implementation of the Paris Agreement of 2015. This publication is the first in the series of three articles tackling various aspects of new shipbuilding policy and tasks that have to be accomplished to meet IMO directives. Subject matter and methods. This paper is an analytical review of documentation and publications on this topic. It relies on IMO documents, EU directives and governing documents of the Russian Federation. Main results. This paper analyses the novelties in the IMO policy towards mitigation of greenhouse gas emissions in the light of the set-out task, i.e. to achieve 70% reduction in the emissions from marine ship traffic by the year 2050 as compared to 2008. To this effect, it is suggested to introduce power efficiency indexes not only for newbuildings, as it was before, but also for the ships already in service. Along with this, another novelty was the introduction of Carbon Intensity Indicator (CII) understood as the result of year-toyear fuel consumption monitoring and assigned as per the rating system. In the new system, CII rating requirements will progressively become more and more stringent so as to create a stimulus for ship owners to take new measures towards reduction of ship emissions every several years. The analysis has shown that emission reduction for both newbuildings and in-service ships requires more research and development. Conclusion. The analysis has shown that the reduction in greenhouse gas emissions from marine traffic stipulated in the new governing documents of IMO and European Union prescribes emission reduction to the levels several times lower than those currently achieved through considerable efforts of shipbuilders and used as reference points in ship design progress in the years 2010–2025. Newly introduced actual emission ratings for each given ship enforced by the threat of its banning from international voyages requires periodic upgrade of the ships in service, with implementation of new technical measures. At this stage, shipbuilding industry must identify above-mentioned measures (they will be analysed in Part II and Part III of this series) and prepare their implementation.
{"title":"Novelties in the international policy towards mitigation of greenhouse gas emissions from ships and necessary measures in marine industry. Part 1. Analysis of regulatory documents governing the new policy of greenhouse gas emission mitigation","authors":"V. Magarovsky, V. Polovinkin, A. Pustoshny, O. Savchenko","doi":"10.24937/2542-2324-2022-4-402-141-156","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-141-156","url":null,"abstract":"Object and purpose of research. This paper is intended to analyse new provisions of IMO policy towards reduction of greenhouse gas emission from international ship traffic, as well as Russian and EU documents governing the environmental policy in the marine industry towards implementation of the Paris Agreement of 2015. This publication is the first in the series of three articles tackling various aspects of new shipbuilding policy and tasks that have to be accomplished to meet IMO directives. Subject matter and methods. This paper is an analytical review of documentation and publications on this topic. It relies on IMO documents, EU directives and governing documents of the Russian Federation. Main results. This paper analyses the novelties in the IMO policy towards mitigation of greenhouse gas emissions in the light of the set-out task, i.e. to achieve 70% reduction in the emissions from marine ship traffic by the year 2050 as compared to 2008. To this effect, it is suggested to introduce power efficiency indexes not only for newbuildings, as it was before, but also for the ships already in service. Along with this, another novelty was the introduction of Carbon Intensity Indicator (CII) understood as the result of year-toyear fuel consumption monitoring and assigned as per the rating system. In the new system, CII rating requirements will progressively become more and more stringent so as to create a stimulus for ship owners to take new measures towards reduction of ship emissions every several years. The analysis has shown that emission reduction for both newbuildings and in-service ships requires more research and development. Conclusion. The analysis has shown that the reduction in greenhouse gas emissions from marine traffic stipulated in the new governing documents of IMO and European Union prescribes emission reduction to the levels several times lower than those currently achieved through considerable efforts of shipbuilders and used as reference points in ship design progress in the years 2010–2025. Newly introduced actual emission ratings for each given ship enforced by the threat of its banning from international voyages requires periodic upgrade of the ships in service, with implementation of new technical measures. At this stage, shipbuilding industry must identify above-mentioned measures (they will be analysed in Part II and Part III of this series) and prepare their implementation.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44898053","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-161-172
N. Anjum, Muhammad Ashikur Rahman, Md. Mynul Islam, M. Hasan
One of the key driving factors of Human development has been our ability to traverse and conquer new ground. The Shipbuilding industry has played a significant role in this aspect by providing the aptest mode of transportation, our floating vessels, which has served us well throughout history and partaken in many revolutions. The materials for building such vessels have seen many variations and iterations stretching from Tree barks & wood to the modern use of Alloy and other synthetic materials. Many supplementary materials are also used nowadays for building a well-functioning vessel and the trade of these materials among various nations also plays a key part in moving its industry forward. The prices of these materials also see many variations, as many contributing factors allocate in their procurement and handling. But, the recent outbreak of the Corona virus pandemic has created many implications with the shipbuilding industry also being largely affected in many ways. In these trying times, Bangladesh has remained strong with a solid base and good initiatives could play a significant role in further enhancing this country’s shipbuilding industry. This paper tries to highlight the popular trends in the Shipbuilding market and plot a series of sustainable approaches which could ensure Bangladesh’s progress in the long run.
{"title":"Overview of Popular Raw Materials in Ship Building and a Sustainable approach for this Industry in Bangladesh","authors":"N. Anjum, Muhammad Ashikur Rahman, Md. Mynul Islam, M. Hasan","doi":"10.24937/2542-2324-2022-4-402-161-172","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-161-172","url":null,"abstract":"One of the key driving factors of Human development has been our ability to traverse and conquer new ground. The Shipbuilding industry has played a significant role in this aspect by providing the aptest mode of transportation, our floating vessels, which has served us well throughout history and partaken in many revolutions. The materials for building such vessels have seen many variations and iterations stretching from Tree barks & wood to the modern use of Alloy and other synthetic materials. Many supplementary materials are also used nowadays for building a well-functioning vessel and the trade of these materials among various nations also plays a key part in moving its industry forward. The prices of these materials also see many variations, as many contributing factors allocate in their procurement and handling. But, the recent outbreak of the Corona virus pandemic has created many implications with the shipbuilding industry also being largely affected in many ways. In these trying times, Bangladesh has remained strong with a solid base and good initiatives could play a significant role in further enhancing this country’s shipbuilding industry. This paper tries to highlight the popular trends in the Shipbuilding market and plot a series of sustainable approaches which could ensure Bangladesh’s progress in the long run.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48550726","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-49-64
K. Sazonov, G. Kanevsky, A. Klubnichkin, A. Dobrodeev
Object and purpose of research. This paper discusses crash-stop of ship propellers. The puspose of the study was to investigate a number of relevant challenges in this process, i.e. to refine the methods of crash-stop distance calculation, to update the scenarios for which crash-stop strength of propeller blades has to be verified, as well as to determine operational parameters and algorithms for automatic control systems of electric power plants in crash-stop conditions. Subject matter and methods. The study was based on the results of quasi-crash-stop model tests, as well as on previous publications about crash-stop maneuvers of ships and operations of their propulsion systems in these conditions. Main results. To obtain more accurate crash-stop distance estimates, it was suggested to use an alternative, bollard-pull system of propeller-hull interaction coefficients for crash-stop conditions. It was also suggested to perform crash-stop strength check of propellers not only for the scenarios with maximum hydrodynamic load, but also for the moment of propeller rotation direction reversal because it might be accompanied by considerable inertial loads. It is shown that model testing is not helpful in determination of operational parameters and automatic control system algorithms for electric power plants because shaft lines cannot be simulated correctly. These parameters can be obtained through calculations, but this will require more refined expressions for shaft line friction moments. Conclusion. The actual problems of ship reverse propulsion theory is presented in the paper. The possible approaches to their solution are proposed.
{"title":"Relevant challenges in crash-stop studies","authors":"K. Sazonov, G. Kanevsky, A. Klubnichkin, A. Dobrodeev","doi":"10.24937/2542-2324-2022-4-402-49-64","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-49-64","url":null,"abstract":"Object and purpose of research. This paper discusses crash-stop of ship propellers. The puspose of the study was to investigate a number of relevant challenges in this process, i.e. to refine the methods of crash-stop distance calculation, to update the scenarios for which crash-stop strength of propeller blades has to be verified, as well as to determine operational parameters and algorithms for automatic control systems of electric power plants in crash-stop conditions. Subject matter and methods. The study was based on the results of quasi-crash-stop model tests, as well as on previous publications about crash-stop maneuvers of ships and operations of their propulsion systems in these conditions. Main results. To obtain more accurate crash-stop distance estimates, it was suggested to use an alternative, bollard-pull system of propeller-hull interaction coefficients for crash-stop conditions. It was also suggested to perform crash-stop strength check of propellers not only for the scenarios with maximum hydrodynamic load, but also for the moment of propeller rotation direction reversal because it might be accompanied by considerable inertial loads. It is shown that model testing is not helpful in determination of operational parameters and automatic control system algorithms for electric power plants because shaft lines cannot be simulated correctly. These parameters can be obtained through calculations, but this will require more refined expressions for shaft line friction moments. Conclusion. The actual problems of ship reverse propulsion theory is presented in the paper. The possible approaches to their solution are proposed.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44250965","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-41-48
V. Bushkovsky, Y. Yegorov
Object and purpose of research. This paper discusses blade systems of propellers and water jets. The purpose of the study was to outline the ways to mitigation of high-frequency non-cavitation noise of marine propulsors. Subject matter and methods. The study analyses Russian and foreign publications on aero- and hydroacoustics of propellers and foil systems. It also determines the parameters of turbulent boundary layer on propeller blades with respect to its effect upon propeller noise radiation. Noise assessment methods obtained for aerodynamics of foil systems have been applied to marine propulsors. Main results. Theoretical studies have shown that marine propellers with fewer blades tend to have lower radiation of high-frequency noise. Direct noise measurements of propulsor models performed under this study have confirmed this trend. Conclusion. In contrast to the low-frequency propeller noise, high-frequency acoustic radiation can be achieved through reduction of propeller blade number.
{"title":"Blade number effect upon high-frequency marine propulsor noise: model test data","authors":"V. Bushkovsky, Y. Yegorov","doi":"10.24937/2542-2324-2022-4-402-41-48","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-41-48","url":null,"abstract":"Object and purpose of research. This paper discusses blade systems of propellers and water jets. The purpose of the study was to outline the ways to mitigation of high-frequency non-cavitation noise of marine propulsors. Subject matter and methods. The study analyses Russian and foreign publications on aero- and hydroacoustics of propellers and foil systems. It also determines the parameters of turbulent boundary layer on propeller blades with respect to its effect upon propeller noise radiation. Noise assessment methods obtained for aerodynamics of foil systems have been applied to marine propulsors. Main results. Theoretical studies have shown that marine propellers with fewer blades tend to have lower radiation of high-frequency noise. Direct noise measurements of propulsor models performed under this study have confirmed this trend. Conclusion. In contrast to the low-frequency propeller noise, high-frequency acoustic radiation can be achieved through reduction of propeller blade number.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46203373","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-19-32
V. Magarovsky, K. Kurchukov, V.G. Platonov, V. Sokolov, M.S. Rudenko
Object and purpose of research. The purpose of this study was to develop a bow shape with increased block coefficient for river-sea vessels so as to improve their seakeeping at high sea states. Subject matter and methods. This paper qualitatively analyses the physics of wave effects upon a moving ship, ranking the contribution of specific factors and solving the task of improving the seakeeping performance through optimization of hull lines. Main results. The study highlighted the peculiarities of intense wave effects upon ship bow and suggested the hull lines offering a good seakeeping performance for a hull with high block coefficient. Seakeeping tests of initial and modified hull models at Krylov State Research Centre Seakeeping Basin have confirmed the theoretical results. Conclusion. The study outlined one of the ways to improve seakeeping performance of river-sea ships with increased block coefficient at high sea states.
{"title":"Bow shape design for river-sea vessels with increased seakeeping performance","authors":"V. Magarovsky, K. Kurchukov, V.G. Platonov, V. Sokolov, M.S. Rudenko","doi":"10.24937/2542-2324-2022-4-402-19-32","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-19-32","url":null,"abstract":"Object and purpose of research. The purpose of this study was to develop a bow shape with increased block coefficient for river-sea vessels so as to improve their seakeeping at high sea states. Subject matter and methods. This paper qualitatively analyses the physics of wave effects upon a moving ship, ranking the contribution of specific factors and solving the task of improving the seakeeping performance through optimization of hull lines. Main results. The study highlighted the peculiarities of intense wave effects upon ship bow and suggested the hull lines offering a good seakeeping performance for a hull with high block coefficient. Seakeeping tests of initial and modified hull models at Krylov State Research Centre Seakeeping Basin have confirmed the theoretical results. Conclusion. The study outlined one of the ways to improve seakeeping performance of river-sea ships with increased block coefficient at high sea states.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68974808","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-157-160
Y. Zhilkina
Object and purpose of research. Weather factor is relevant for almost all branches of economy. In electric power industry, the demand for energy becomes higher in autumn and winter because houses need heating. In the last decades, the topic of climate change and its implications for various industries has evolved from a theoretical question to one of the most important factors in global agenda. This paper will discuss climatic risks and their implications for the activities of FGC UES. Subject matter and methods. The organizational part of this work analyses and classifies climatic risks and discusses their contribution. Data analysis and development of analytical relationships were based on the calculation principles for technical parameters and integrated reliability indicators. Main results. The analysis of climatic effects upon electric power industry delineates the mechanism for finding the events that ensure trouble-free operation of power grid components. Climatic risks are tackled not only as hazards but also as opportunities. Conclusion. The analysis of climatic risks enables the adjustment of FGC UES power saving strategy, as well as adaptation of its power generation assets to consumer demands.
{"title":"Climatic risks in electric power industry","authors":"Y. Zhilkina","doi":"10.24937/2542-2324-2022-4-402-157-160","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-157-160","url":null,"abstract":"Object and purpose of research. Weather factor is relevant for almost all branches of economy. In electric power industry, the demand for energy becomes higher in autumn and winter because houses need heating. In the last decades, the topic of climate change and its implications for various industries has evolved from a theoretical question to one of the most important factors in global agenda. This paper will discuss climatic risks and their implications for the activities of FGC UES. Subject matter and methods. The organizational part of this work analyses and classifies climatic risks and discusses their contribution. Data analysis and development of analytical relationships were based on the calculation principles for technical parameters and integrated reliability indicators. Main results. The analysis of climatic effects upon electric power industry delineates the mechanism for finding the events that ensure trouble-free operation of power grid components. Climatic risks are tackled not only as hazards but also as opportunities. Conclusion. The analysis of climatic risks enables the adjustment of FGC UES power saving strategy, as well as adaptation of its power generation assets to consumer demands.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48370028","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}
Pub Date : 2022-10-14DOI: 10.24937/2542-2324-2022-4-402-120-125
S. Zenchenko
Object and purpose of research. This paper discusses infrared signature measurements for test targets. The purpose of the study was to control and investigate infrared signature and its dynamics in different conditions of its generation by a simulator of an absolutely black body. Subject matter and methods. The measurement was performed with a set of automatically rotating 4-slot targets. From one side, these targets were subject to the radiation from an absolutely black body and a 7–14 μm IR thermal imager. On the other side, the targets had the instrumentation that recorded infrared signals. Main results. The study yielded infrared signature estimates for six different targets. It also yielded the expressions linking the parameters of the target field, the field around target slots and the initial field generated by the absolutely black body. It was also possible to obtain the parameters that determine the efficiency of IR imager in the detection of targets of different size. The study established the boundaries for 50 % loss of target structure detection and investigated the methods that maintain the applicability of this technique. Conclusion. The study yielded the data about acceptable resolution parameters of the IR imager, as well as the methods for maintaining its capabilities and further development paths for this control technology based on test targets.
{"title":"Peculiarities and results of infrared signature measurement on 4-slot disk target and absolutely black body at wavelengths 7–14 μm","authors":"S. Zenchenko","doi":"10.24937/2542-2324-2022-4-402-120-125","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-4-402-120-125","url":null,"abstract":"Object and purpose of research. This paper discusses infrared signature measurements for test targets. The purpose of the study was to control and investigate infrared signature and its dynamics in different conditions of its generation by a simulator of an absolutely black body. Subject matter and methods. The measurement was performed with a set of automatically rotating 4-slot targets. From one side, these targets were subject to the radiation from an absolutely black body and a 7–14 μm IR thermal imager. On the other side, the targets had the instrumentation that recorded infrared signals. Main results. The study yielded infrared signature estimates for six different targets. It also yielded the expressions linking the parameters of the target field, the field around target slots and the initial field generated by the absolutely black body. It was also possible to obtain the parameters that determine the efficiency of IR imager in the detection of targets of different size. The study established the boundaries for 50 % loss of target structure detection and investigated the methods that maintain the applicability of this technique. Conclusion. The study yielded the data about acceptable resolution parameters of the IR imager, as well as the methods for maintaining its capabilities and further development paths for this control technology based on test targets.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49416554","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}
Pub Date : 2022-09-02DOI: 10.24937/2542-2324-2022-1-s-i-80-84
А.Н. Дмитриев, Елена Алексеевна Морозова, Д.Д. Кудряшов
Численное моделирование посадки на грунт железобетонного судна-накопителя нефтепродуктов с определением напряженно-деформированного состояния для оценки прочности и трещиностойкости элементов его конструкции. Численное моделирование с использованием метода конечных элементов с последующей оценкой результатов в соответствии с критериями прочности и трещиностойкости, предъявляемыми к железобетонным конструкциям. Разработана конечно-элементная модель железобетонного судна-накопителя нефтепродуктов с представленным в явном виде армированием. Выполнен анализ напряженно-деформированного состояния конструкции железобетонного судна-накопителя под действием внешних нагрузок, включая нагрузки согласно правилам NAABSA. Полученные результаты подтверждают достаточную прочность и трещиностойкость элементов конструкции железобетонного судна-накопителя при посадке на грунт.
{"title":"Оценка прочности и трещиностойкости железобетонного судна-накопителя нефтепродуктов с использованием численного моделирования","authors":"А.Н. Дмитриев, Елена Алексеевна Морозова, Д.Д. Кудряшов","doi":"10.24937/2542-2324-2022-1-s-i-80-84","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-s-i-80-84","url":null,"abstract":"Численное моделирование посадки на грунт железобетонного судна-накопителя нефтепродуктов с определением напряженно-деформированного состояния для оценки прочности и трещиностойкости элементов его конструкции. Численное моделирование с использованием метода конечных элементов с последующей оценкой результатов в соответствии с критериями прочности и трещиностойкости, предъявляемыми к железобетонным конструкциям. Разработана конечно-элементная модель железобетонного судна-накопителя нефтепродуктов с представленным в явном виде армированием. Выполнен анализ напряженно-деформированного состояния конструкции железобетонного судна-накопителя под действием внешних нагрузок, включая нагрузки согласно правилам NAABSA. Полученные результаты подтверждают достаточную прочность и трещиностойкость элементов конструкции железобетонного судна-накопителя при посадке на грунт.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42251560","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}
Pub Date : 2022-07-05DOI: 10.24937/2542-2324-2022-3-401-39-46
V. Korshunov, М. Kuteinikov, R.S. Мudrik, D. A. Ponomarev, А.А. Rodionov
Object and purpose of research. The investigation considers approaches for inclusion of sloshing and ship speed and discusses their influence on estimation of hull responses to external loads. Materials and methods. The 3D panel method is used to solve a hydrodynamic problem of potential flow around ship hull in regular waves. The sloshing is included by direct modeling of inner tanks also containing potential fluid. The ship speed is taken into account by additional potential of inflow. Main results. Analysis of response amplitude operators (RAO) and bending moments with and without additional factors introduced in the mechanical model. Conclusion. The problem of ship motions in regular waves taking into account sloshing and ship speed was solved in the work process. The influence on responses of the considered mechanical system for taking these factors into considerations is analysed. The applied panel method shows flexibility regarding additional factors of modeling and offers a prospect for further investigation of non-linear effects associated with ship motions in waves.
{"title":"Application of numerical procedures for assessment of tanker wave loads including sloshing and ship speed","authors":"V. Korshunov, М. Kuteinikov, R.S. Мudrik, D. A. Ponomarev, А.А. Rodionov","doi":"10.24937/2542-2324-2022-3-401-39-46","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-3-401-39-46","url":null,"abstract":"Object and purpose of research. The investigation considers approaches for inclusion of sloshing and ship speed and discusses their influence on estimation of hull responses to external loads. Materials and methods. The 3D panel method is used to solve a hydrodynamic problem of potential flow around ship hull in regular waves. The sloshing is included by direct modeling of inner tanks also containing potential fluid. The ship speed is taken into account by additional potential of inflow. Main results. Analysis of response amplitude operators (RAO) and bending moments with and without additional factors introduced in the mechanical model. Conclusion. The problem of ship motions in regular waves taking into account sloshing and ship speed was solved in the work process. The influence on responses of the considered mechanical system for taking these factors into considerations is analysed. The applied panel method shows flexibility regarding additional factors of modeling and offers a prospect for further investigation of non-linear effects associated with ship motions in waves.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45044147","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：