Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra最新文献

{"title":"Calculation of dipole magnetic moment from open-surface measurements","authors":"A. Vishnevsky, A. Firsova","doi":"10.24937/2542-2324-2022-1-399-168-175","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-168-175","url":null,"abstract":"Object and purpose of research. This paper discusses a quadrature-based method of dipole magnetic moment (DMM) calculation as per magnetic field measurement data for the open surface encompassing magnetic field sources. The purpose of the study was to modify this method for the case when measurement data are not available for certain areas on the surface (in other words, when the surface is not closed). Materials and methods. The paper describes magnetic dipole calculation methods, as well as the publications discuss-ing their efficiency. The method suggested in this paper basically substitutes the lacking magnetic field data by the values for pre-defined type of source, thus giving the correction coefficients needed to take into account the contribution of lacking areas. Main results. The paper suggests the methods for taking into account the missing parts of the open measurement surface in quadrature-based DMM calculation procedure. Calculation errors of DMM components for magnetic fields of various structure are estimated as per the solution for a series of test problems. Conclusion. The quadrature method offered in this study offers more accurate DMM calculation. The expressions given in the paper could be used to calculate DMM components as per magnetic field measurements for the generatrices of cylindrical surface, and the approach suggested in this study could be applied to arbitrary open surfaces.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46815626","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}

{"title":"Мгновенное рассеивание мощности в усилителях класса АВ и класса В","authors":"E. Sirakov, G. Evstatiev","doi":"10.24937/2542-2324-2022-1-399-137-140","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-137-140","url":null,"abstract":"This paper presents analysis of class AB and class B amplifiers dissipation calculated by equals (1) and (2) with MathCad. The figure shows works of push-pull audio power amplifier computer simulations with PSpice Student Version.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49182950","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}

{"title":"Effect of porosity and microstructure damage on mechanical properties of polymeric syntactic foam","authors":"P. Dodonov","doi":"10.24937/2542-2324-2022-1-399-65-74","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-65-74","url":null,"abstract":"Object and purpose of research. This paper discusses syntactic foam, a polymeric composite material of heterogeneous composition (polymeric matrix with microspherical inclusions). The purpose of this study was to analyse the data obtained for the structural model of this material, as well as the results of FEM simulations, with comparison between the two. Materials and methods. The inputs for this study were composition and structure of syntactic foam and properties of its components (polymeric matrix and glass microspheres). Main results. Structural model of syntactic foam straining and failure made it possible to estimate how strength and reliability of the entire material depends on the properties of its components. Conclusion. The study yielded analytical expressions for effective properties of syntactic foam taking into account structural defects and porosities.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47486138","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}

{"title":"Load simulation of icebreaker propulsion motors at laboratory and virtual tests of electric propulsion systems","authors":"N. Vasilyev, I. Kalinin, V. Polovinkin, A. Pustoshny, O. Savchenko, K. Sazonov","doi":"10.24937/2542-2324-2022-1-399-15-30","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-15-30","url":null,"abstract":"Object and purpose of research. This paper discusses ice loads on shaft-lines of icebreakers and ice-going ships as their propellers interact with ice. These loads are needed as inputs for development and fine-tuning of electric propulsion control systems, including those involving load test rigs, with the final purpose of ensuring reliable and safe operation of electric propulsion plants in ice navigation conditions. Materials and methods. This study is based on the publications about ice loads on shafting of electric propulsion plants. It analyses the terminology used in the papers on this subject. It also analyses the data on ice-induced shafting torques, as obtained from full-scale trials of Akademik Tryoshnikov ice-class research vessel. Main results. The paper describes typical cases of extreme ice loads on the propulsion system, with the input data characterizing these loads and needed, in particular, for numerical simulation of ice loads on shafting in order to fine-tune electric propulsion control system by means of computer-based simulations or laboratory tests. The paper shows the importance of considering the inertial elements of the shaft line for correct determination of limit loads. It also formulates the challenges that have to be solved in order to obtain efficient control systems for electric propulsion plants of icebreakers and ice-going ships. It determines the requirements to special full-scale trials needed to validate calculation methods for shafting loads. Conclusion. Electric propulsion systems of ice-going ships must have highly efficient control tools for the propulsion motor that would ensure its reliable and safe operation as propeller interacts with ice. Such a tool is quite hard to obtain because shafting loads are quite various and difficult to predict. One of the ways to improve an electric propulsion system is to build up a test rig with the load part simulating various scenarios of shafting loads as per the mathematical model specially developed for this purpose and validated by the accumulated database of full-scale ice loads on shaft lines. The paper also demonstrates that propulsion motor control system must properly take into account not only external loads but also inertial torques of shaft line, motor rotor and propeller with added water mass.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42690283","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}

{"title":"Conceptual development of desalination plant for future nuclear submarines","authors":"V. Kirikova, P. Dmitriev","doi":"10.24937/2542-2324-2022-1-399-125-129","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-125-129","url":null,"abstract":"Object and purpose of research. This paper discusses seawater desalination plants for production of distillate to be used as feed water for main engines of Russian nuclear submarines, as well as the basis of potable water for drinking and household needs. The purpose of this work was to select the type of desalination plant for future nuclear submarines. Materials and methods. Currently, Russian nuclear submarines have two types of desalination plants, i.e. distillers and reverse-osmosis units. Each of these types has its own pros and cons, so the question of desalination plant type selection for future nuclear submarines becomes one of the most relevant. Main results. This paper briefly analyses marine seawater desalination systems in terms of their performance parameters and operation peculiarities (i.e. construction and operation challenges). Conclusion. As a promising path for desalination plants of new-generation submarines the authors recommend reverse-osmosis units.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48737355","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}

{"title":"Universal assessment method for laser detection probability of sunken engineering structures","authors":"A. Zavyalov, Yuri F. Patrakov","doi":"10.24937/2542-2324-2022-1-399-176-188","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-176-188","url":null,"abstract":"Object and purpose of research. Laser diagnostics, analysis of reflected laser signal from fixed underwater objects, improvement of laser optical methods, technologies and tools for underwater object studies, development of laser detection systems, determination of laser indication probability for fixed underwater objects. Materials and methods. Laser detection systems, analytical and computational methods, software programs, analytical tools for measurement data processing, laser diagnostics of reflected laser signal from underwater objects taking into account dissipation and absorption in atmosphere and hydrosphere. Main results. Improvement of technology and methods for diagnostics of reflected laser signal (back-scattering), determination of reliable detection limits for laser signals reflected from fixed underwater objects, software programs, laser diagnostics, efficiency analysis of laser detection systems. Conclusion. The study showed that high efficiency of laser detection systems considerably depends on the selected tech- nology, reflected laser signal display and processing techniques, and also on the probabilistic methods adopted to estimate the reflected signal luminance and the knowledge of hydrodsphere parameters.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44429471","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}

{"title":"Development trends in marine production platform fleet in 2015–2021","authors":"K. Berezhnoy, S. Verbitsky","doi":"10.24937/2542-2324-2022-1-399-189-196","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-399-189-196","url":null,"abstract":"Object and purpose of research. This paper discusses marine oil and gas production platforms splitted into four types depending on their purpose. The study was intended to analyse the changes in global production platform fleet and outline the main trends in its development. Materials and methods. The study was based on the open-access data available with offshore field developers, oil and gas companies, shipyards and design offices. The methods in this study were acquisition, analysis and comparison of the data about the fleet of marine oil and gas production platforms. Main results. The paper presents the results of fleet composition analysis for floating oil and gas production platforms over the period of 2015–2021 characterized by the decline in global oil and gas prices. The study shows that the most common type of marine production platforms is FPSO (213 vessels). The strength of FPU and FPDSO fleets remains the same: 99 and 2 vessels respectively. Their geography has not changed either. The fleet of FLNGs has increased up to 7 ships since the commissioning of first FLNGs in 2014. Conclusion. FPSO platforms of various designs (mostly ship-type) offer high mobility and operational flexibility, i.e. greater project revenues and zero pipeline construction costs in case of remote field developments. It must be noted that water depths at FPSO locations have reached their record highs: 2900 m for production platforms and 3400 m for drilling ones. In future, floating platforms could be replaced by subsea production system but their massive introduction cannot be expected in at least 30–50 years to come.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41416821","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}

{"title":"Расширение компетенций российского морского регистра судоходства. Введение требований к инновационным материалам и технологиям","authors":"C.М. Кордонец, М.А. Кутейников, А.В. Кучапов, М.Е. Юрков","doi":"10.24937/2542-2324-2022-1-s-i-28-32","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-s-i-28-32","url":null,"abstract":"В статье рассматриваются инновационные материалы и технологии для судостроения и внедрение их в нормативную базу Российского морского регистра судоходства (далее-Регистр, РС) в 2020-2021гг. К таким технологиям относятся: сварка трением с перемешиванием, аддитивные технологии, полимерные композиционные материалы. При этом с практическим применением аддитивных технологий и сварки трением с перемешиванием Регистр сталкивается впервые. Опыт применения и нормирования технологий изготовления полимерных композиционные материалов в Регистре уже имелся, в данной статье рассматривается развитие применения данной технологии. В статье также, на примерах с указанными инновациями показан подход РС к их внедрению и совершенствованию Правил.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45103086","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}

{"title":"Жизнь, посвящённая науке (к 100-летию со дня рождения Б.Ф. Титаева)","authors":"Сергей Владимирович Антоненко, В.Г. Бугаев, М.В. Китаев, В. В. Новиков","doi":"10.24937/2542-2324-2022-1-s-i-42-45","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-s-i-42-45","url":null,"abstract":"Статья посвящена 100-летию со дня рождения Б.Ф. Титаева, инженера-кораблестроителя, д.т.н., профессора, бывшего ректора Дальневосточного политехнического института, видного специалиста в области теории оболочек. Приводятся краткие биографические сведения. По инициативе и при личном участии Б.Ф. Титаева был выполнен комплекс работ по созданию необитаемых глубоководных аппаратов. Б.Ф. Титаев занимался также проблемами разработки подводных месторождений железо-марганцевых конкреций и газогидратов, нетрадиционной энергетикой.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49508938","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}

{"title":"Разработка варианта опорного устройства для постановки ледокола «Арктика» в сухой док","authors":"Сергей Владимирович Антоненко, В.М. Дитковская, К.А. Молоков, В. В. Новиков","doi":"10.24937/2542-2324-2022-1-s-i-35-41","DOIUrl":"https://doi.org/10.24937/2542-2324-2022-1-s-i-35-41","url":null,"abstract":"В процессе эксплуатации нового атомного ледокола «Арктика» произошел отказ гребного электродвигателя (ГЭД) правого борта. Для выгрузки ГЭД через вырез в борту было необходимо поставить судно в сухой док Кронштадтского морского завода на опорное устройство (ДОУ) увеличенной высоты. В связи с этим возникла необходимость изготовления большого количества дополнительной оснастки. Для минимизации стоимости и длительности подготовки и последующего демонтажа ДОУ было желательно уменьшить площадь ДОУ до разумного минимума. При этом следовало определить материал и конструкцию деревянных подушек центральной и боковых килевых дорожек с учетом, в частности, того обстоятельства, что допускаемые нагрузки на днище дока вне центральной килевой дорожки достоверно неизвестны и потому требовалось ограничить нагрузки на боковые дорожки. В распоряжении авторов имелись предварительные проработки ДОУ и проектные расчеты реакций кильблоков. Были очевидны значительные резервы прочности. В работе выполнены расчеты ДОУ с использованием известного метода пяти моментов, а также метода проектирования ДОУ на заданную кривую опорных реакций с учетом предполагаемой строительной погиби. По результатам этих расчетов были разработаны конкретные рекомендации по конструкции ДОУ, направленные на снижение количества кильблоков при безусловном выполнении требований прочности.","PeriodicalId":33210,"journal":{"name":"Trudy Krylovskogo gosudarstvennogo nauchnogo tsentra","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43140862","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}