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Wyszukujesz frazę "Offshore" wg kryterium: Temat


Tytuł:
Design of structure of tension leg platform for 6 MW offshore wind turbine based on FEM analysis
Autorzy:
Żywicki, J.
Dymarski, P.
Ciba, E.
Dymarski, C.
Powiązania:
https://bibliotekanauki.pl/articles/260390.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
offshore wind turbine
TLP
support structure
FEM
Opis:
The article presents the calculation and design stages of the TLP platform serving as a supporting construction of a 6 MW offshore wind turbine. This platform is designed to anchor at sea at a depth of 60 m. The authors presented the method of parameterization and optimization of the hull geometry. For the two selected geometry variants, the load and motion calculations of the platform subjected to wind, wave and current under 50-year storm conditions were performed. The maximum load on the structure was determined in these extreme storm conditions. For these loads, the MES calculation of the designed platform was performed for the selected variant. Authors have presented a method for calculating maximum wind, wave and current stresses on the structure during the worst storm in the past 50 years. For these loads the MES endurance calculations of the designed platform were made. Based on the results of these calculations, the required structural changes and recalculations have been made in succession to the structural design of the platform, which meets the design requirements and has the required ad hoc strength. The article contains stress analysis in „difficult” nodes of constructions and discusses ways of solving their problems. The work is part of the WIND-TU-PLA project from the NCBR Research Agreement (Agreement No. MARTECII / 1/2014).
Źródło:
Polish Maritime Research; 2017, S 1; 230-241
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite element local analysis of wave slamming on offshore structure
Autorzy:
Żyliński, B.
Powiązania:
https://bibliotekanauki.pl/articles/258614.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
explicit analysis
FEM
offshore structures
wave slamming
Opis:
Offshore platforms are exposed to waves slamming event. Waves hitting the columns with a high velocity are in many cases the design criteria for column structure. This paper focuses on the analysis of wave slamming on floating platform column. Significant for wave slamming pressure is load history, which is usually based on model test. Wave slamming loads were defined on all four walls of column to assess the worst place. For south wall of column three positions exposed to slamming loads between elevation 21.000 (SWL) and elevation 35.500 were checked. Dynamic analysis has been performed with nonlinear FEM program ABAQUS /explicit. The steel was modeled as an elastic-plastic material with isotropic hardening.
Źródło:
Polish Maritime Research; 2009, 1; 8-12
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survey Smulator – platforma VR dla edukacji w przemyśle morskim
Survey Simulator – VR educational platform for maritime industry
Autorzy:
Żrodowski, C.
Powiązania:
https://bibliotekanauki.pl/articles/267027.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
rzeczywistość wirtualna
symulacja
grafika 3D
oceanotechnika
okrętownictwo
edukacja
virtual reality
simulation
3D graphics
offshore
shipbuilding
education
Opis:
Artykuł przedstawia założenia, architekturę i główne funkcje programu DNVGL Survey Simulator. Program, bazujący na wizualizacji 3D okrętów i platform wiertniczych, został stworzony w celu wspomagania profesjonalnego szkolenia załóg pływających. Realizuje on model kształcenia w znacznej mierze odmienny od akademickiego, skoncentrowany przede wszystkim na problemach praktycznych i procedurach obowiązujących w przemyśle. Przedstawione zostały również pierwsze wyniki jego implementacji w procesie nauczania na Wydziale Oceanotechniki i Okrętownictwa Politechniki Gdańskiej.
The paper presents history, architecture and functionality of Survey Simulator – an innovative solution helping to train in carrying out visual inspections in more comprehensive, efficient and safe way. Various utilities offered by Survey Simulator help trainees with gaining practical knowledge in order to become self-reliant in their future daily tasks. It makes practical training possible without leaving classroom. The second important problem presented in this paper is an implementation of Survey Simulator at Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology. Using teaching tool based on practical approach, quite different than theoretical one, dominating at universities, generates new expectations as well as new opportunities for students, researchers and commercial software vendor. Different aspects of cooperation between academia and industry were described as well as first conclusions after few months of intensive usage of the program by students.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 41; 77-84
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and optimization design of offshore drilling seal
Autorzy:
Zhang, Y.
Zhang, X.
Chang, X.
Wu, Q.
Powiązania:
https://bibliotekanauki.pl/articles/260627.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
offshore drilling
design optimization
seals
finite element analysis
MATLAB
Opis:
Three-cone bit is the key equipment in the exploration of the oil in offshore drilling and exploration, the bearing system and the seal system are the critical components for the bit. Especially in the offshore drilling environment, the seal design need to be carefully considered. A multi-objective optimization design including orthogonal design method and F-test with finite element analysis for a three-cone bit seal is proposed. Firstly, the calculation method of optimization targets are given, including the minimization of maximum contact pressure and leakage rate analyzed by ANSYS and MATLAB respectively, to maximize seal life and reliability. Then, an orthogonal experiment approach is used to investigate the effects of the eleven parameters on the seal performance, and the influence degrees of the seal factors on the optimization targets have been confirmed by F-test, and the reasonable factors can be determined by the trend of the targets. Finally, in order to validate the analysis results, a new seal was designed and tested on a seal tester compared to the previous seal. In this test, the seal maximum interface temperature that reflects the position of maximum contact pressure can be obtained by using three high precision thermocouples. Both the experiment results and the numerical analyses proved that the maximum contact pressure and leakage rate of the improved seal have been reduced compared to the previous.
Źródło:
Polish Maritime Research; 2017, S 3; 72-78
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability based analysis and design of a tripod offshore wind turbine structure assuring serviceability performance
Autorzy:
Zhang, J.
Kang, W. H.
Zhang, C.
Sun, K.
Powiązania:
https://bibliotekanauki.pl/articles/259493.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
offshore wind turbine
tripod foundation
serviceability limit state
statistical correlation analysis
reliability analysis
Opis:
Typical tripod foundations are designed using deterministic computational models according to relevant standards and codes. However, for more cost-safety balanced design, uncertainties in significant parameters should be considered in preliminary design to ensure meeting a specific probabilistic safety target in the context of the complex configuration of a tripod structure. In this article, uncertainties associated with design parameters and modelling errors are considered using Monte Carlo simulations, in order to determine the key structural design parameters, and to determine the optimal balance between design parameters and design requirements. A Spearman rank-order correlation based analysis is carried out to understand the effects of design variables on maximum deformation, total weight, and natural frequency, and to have insight about important design parameters for improvement of a preliminary design. It is found that the tower diameter has the most significant effect on the maximum displacement on the hub as validated through engineering case studies. In addition, a statistical framework, which identifies influential design parameters and provides reliability evaluation, is proposed for the structural design of a tripod OWT system. The design cases considered in this study indicate that a simple deterministic design check cannot guarantee the required reliability level of the structure, and the cost-safety balance can be achieved by a reliability analysis with the consideration of the uncertainties in the structure.
Źródło:
Polish Maritime Research; 2018, 4; 139-148
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrodynamic load and parametric design of grouted clamp used on offshore jacket
Autorzy:
Zhang, B
Wang, Z.
Wang, T.
Powiązania:
https://bibliotekanauki.pl/articles/259702.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
offshore jacket
grouted clamp
parameterized design
mechanics experiment
Opis:
The reliability and safety of offshore platform are an important research aspect in marine engineering. The jacket platform is mainly used for oil development and submarine drilling, and the long-term work in the marine environment will be subjected to different loads, which will lead to the damage of the structure part of the offshore platform. It affects the structural strength of the platform. For the repair of jacket damage, grouted reinforcement technology is adopted, which has the advantages of simple underwater installation and low cost. The reinforcement technology of the grout hoop has been applied to the engineering projects abroad, but the stress and serialization design of the hoop in the marine environment need further study. This paper will combine the ocean current and wave force to carry out the research of underwater work and prevent loosening, and put forward the parametric design method for the specific size of the hoop. Two types of experimental models are designed: short bolt form clamp and long bolt form clamp. The mechanical experiment of the long bolt clamp is carried out, and the relationship between the slipping force and the bolt preload is analyzed, so as to verify the theoretical analysis.
Źródło:
Polish Maritime Research; 2018, S 3; 154-165
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Practical aspects of the cone penetration tests CPTU as used in the Polish Exclusive Economic Zone of the Baltic Sea
Praktyczne aspekty sondowań statycznych CPTU w Polskiej Wyłącznej Strefie Ekonomicznej Morza Bałtyckiego
Autorzy:
Załęski, K.
Juszkiewicz, P.
Szypulski, P.
Powiązania:
https://bibliotekanauki.pl/articles/111498.pdf
Data publikacji:
2015
Wydawca:
Instytut Morski w Gdańsku
Tematy:
offshore cone penetration test
CPTU units
CPTU procedures
morskie sondowania CPTU
sondy CPTU
procedury CPTU
Opis:
The cone penetration test is one of the most widely used methods in land and marine geotechnical site investigations. CPTU allows for a determination of in-situ geotechnical properties of soils, and recognizing soil stratigraphy. This article provides an overview of the CPTU testing equipment that is used for seabed investigation in the Polish Exclusive Economic Zone. It is largely based on experience gained while performing and supervising the tests. The authors describe the proper procedure of testing, and provide detailed information on preparation of the equipment (calibration, placing CPTU unit on seabed).
Sondowanie statyczne CPTU jest jednym z najczęściej stosowanych narzędzi we współczesnych lądowych i morskich badaniach geotechnicznych. Daje możliwość rozpoznania podłoża pod kątem stratygrafii oraz parametrów gruntów warunkach in situ. Niniejszy artykuł zawiera przegląd urządzeń wykorzystywanych do sondowań CPTU dna morskiego w Polskiej Wyłącznej Strefie Ekonomicznej. W znacznej mierze oparty jest na doświadczeniach własnych, zdobytych podczas wykonywania i nadzorowania badań. Autorzy opisując procedurę sondowania, zwracają szczególną uwagę na odpowiednie przygotowanie sprzętu (kalibracja, ustawienie sondy CPTU na dnie).
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2015, 30, 1; 96-103
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An expert elicitation analysis for vessel allision risk near the offshore wind farm by using fuzzy rule-based bayesian network
Autorzy:
Yu, Q.
Liu, K.
Powiązania:
https://bibliotekanauki.pl/articles/117215.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
offshore wind farms
expert elicitation analysis
Bayesian network model
fuzzy rule-based bayesian network
Failure Modes and Effects Analyses (FMEA)
Bayesian Networks
vessel allision risk
risk analysis
Opis:
This paper develops an expert based framework for analysing and synthesising the ship allision risk near the offshore wind farm (OWF) on the basis of a generic Fuzzy Bayesian network and FMEA analysis. This framework is specifically intended to overcome the difficulty of using traditional risk assessment methods in OWF allision. Under the introduced framework, subjective belief degrees are assigned to model the incompleteness encountered in establishing the knowledge base. The fuzzy transformation technology is then used to introduce all judgements results under various situations. Fully, a Bayesian network is established to aggregate all relevant attributes to the conclusion and to prioritise potential allision risk level of each ship categories. A series of case studies of different ship categories are studied to illustrate the application of the proposed framework. Results show that the fishing vessel and the service vessel have a higher allision risk than the merchant vessel due to insufficient risk detection. The collision consequence of the tanker is significantly higher than other types of vessel. The framework facilitates subjective risk assessment when historical failure data is not available in their practice, which provides support to OWF-safeguarding and decision-making.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 831-837
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear vibration signal tracking of large offshore bridge stayed cable based on particle filter
Autorzy:
Ye, Q.
Feng, Z.
Yuan, D.
Powiązania:
https://bibliotekanauki.pl/articles/260358.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
nonlinear vibration of stayed cables
large offshore bridge
particle filter
signal tracking
Opis:
The stayed cables are key stress components of large offshore bridge. The fault detection of stayed cable is very important for safe of large offshore bridge. A particle filter model and algorithm of nonlinear vibration signal are used in this paper. Firstly, the particle filter model of stayed cable of large offshore bridge is created. Nonlinear dynamic model of the stayed-cable and beam coupling system is dispersed in temporal dimension by using the finite difference method. The discrete nonlinear vibration equations of any cable element are worked out. Secondly, a state equation of particle filter is fitted by least square algorithm from the discrete nonlinear vibration equations. So the particle filter algorithm can use the accurate state equations. Finally, the particle filter algorithm is used to filter the vibration signal of bridge stayed cable. According to the particle filter, the de-noised vibration signal can be tracked and be predicted for a short time accurately. Many experiments are done at some actual bridges. The simulation experiments and the actual experiments on the bridge stayed cables are all indicating that the particle filter algorithm in this paper has good performance and works stably.
Źródło:
Polish Maritime Research; 2015, 4; 70-75
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEM calculations in analysis of steel subsea water injection flowlines designing process
Autorzy:
Wodtke, M.
Olszewski, A.
Wójcikowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/259856.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
offshore engineering
water injection flowlines analysis
FEM simulation
Opis:
The article describes the result of theoretical research aimed at assessing the loads and operating conditions of a Coiled Tubing pipeline injecting water, suspended to the mining platform of Lotos Petrobaltic. For this purpose, appropriate calculation models have been developed using the Finite Element Method (FEM), taking into account the nature of the analyzed object and its loads. The analyzes were carried out for two pipes (previously operated and newly proposed) differing in geometrical and strength parameters. The research was carried out for selected directions of load on the pipeline (originating from sea waves) and various variants of attaching the suspended pipeline to the mining platform.
Źródło:
Polish Maritime Research; 2018, 3; 84-93
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical and economic issues of offshore pipeline carbon dioxide transportation
Autorzy:
Włodek, T.
Kuczyński, S.
Hendel, J.
Powiązania:
https://bibliotekanauki.pl/articles/298735.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
carbon dioxide
CO2
pipeline
CO2 transport
pipeline transportation
offshore pipeline
Opis:
The technical and economic conditions of carbon dioxide offshore pipeline transportation are presented in this paper. The basie conditions in which carbon dioxide will be transported, as well as the thermodynamic conditions, physicochemical properties and technical parameters, relevant to CO2 pipeline transport, are addressed in this article. The basie costs of pipeline carbon dioxide transport are also considered. The carbon dioxide flow was simulated for a few pipeline diameter sizes to determine the operating pressure of the pipeline for various maximum mass flow rate values. Different conditions of CO2 flow including impact of ambient conditions were analyzed. There is also included an analysis of technological systems and installation concepts for carbon dioxide preparation for efficient pipeline transportation.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 2; 341-354
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka centrów finansowych offshore – tzw. rajów podatkowych
Offshore financial centres
Autorzy:
Wiśniewski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/16539530.pdf
Data publikacji:
2012
Wydawca:
Kancelaria Sejmu. Biuro Analiz Sejmowych
Tematy:
financial policy
fiscal policy
offshore financial centre
tax haven
fiscal harmonisation
Opis:
The aim of this article is to introduce the concept of offshore financial centres (so-called „tax havens”). The first section briefly reviews definitions and characteristics of a tax haven. Next, the categorisation of offshore financial centres is presented. The last section examines financial and economic competitiveness of offshore financial centres. In the context of the EU’s fiscal harmonisation special attention is given to overseas territories of EU member states that can be classified as offshore financial centres.
Źródło:
Studia BAS; 2012, 3(31); 183-203
2080-2404
2082-0658
Pojawia się w:
Studia BAS
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Offshore Detention in Australia: Behrouz Boochani’s No Friend but the Mountains: Writing from Manus Prison (2018)
Autorzy:
Wilson, Janet M
Powiązania:
https://bibliotekanauki.pl/articles/2049128.pdf
Data publikacji:
2021-10-07
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Manus Island
Behrouz Boochani
Pacific Solution
Immigration Detention Centres
Australia
deterrence systems
offshore regional processing
Opis:
This article focuses on the “Pacific Solution,” the Australian national policy of controlling illegal migration by detaining refugees in Immigrant Detention Centres in offshore Pacific islands of Manus and Nauru, and the human rights issues it raises. It refers to Behrouz Boochani’s prize-winning refugee memoir, No Friend but the Moun- tains: Writing from Manus Prison (2018) as both a prison narrative of resilience and a politically resistant text, and it discusses Boochani’s representation of Manus Detention camp as “The Kyriarchal System” in terms of Foucault’s “monstrous heterotopia.” The ar- ticle emphasises the issues of accountability and responsibility in the bilateral governance arrangements of the Manus Detention Centre between Australia and Papua New Guinea, and considers the possibility of more humane detention practices in the future.
Źródło:
Anglica. An International Journal of English Studies; 2021, 30(3); 163-183
0860-5734
Pojawia się w:
Anglica. An International Journal of English Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena ryzyka eksploatacji morskich elektrowni wiatrowych w Polsce dla potrzeb ich ubezpieczenia od wybranych zdarzeń losowych
Autorzy:
Wieteska, Stanisław
Szymańska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/611044.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
marine wind farms
offshore wind power farms
non-life insurance
morskie elektrownie wiatrowe
ubezpieczenia majątkowe
Opis:
Starting in the late 20th century, we are seeing increased interest in obtaining energy from renewable sources. One of those sources is wind energy and its use. Increased interest in offshore wind farms in Poland is caused by the introduction of numerous restrictions on the construction of terrestrial power plants. The purpose of this article is to assess the operational risk of offshore wind farms from the point of view of their ability to be covered by insurance. The article discusses the principles of their functioning, the accompanying natural hazards as well as the general conditions of their coverage by indicating the subject of insurance, the scope of insurance and the sum insured. General conditions of operation of offshore wind farms were discussed.
Począwszy od końca XX w., obserwuje się wzrost zainteresowania pozyskaniem energii z odnawialnych źródeł. Jednym z nich jest energia wiatru. Wprowadzenie licznych ograniczeń dotyczących budowy lądowych elektrowni wiatrowych powoduje, nie tylko w Polsce, wzrost zainteresowania morskimi elektrowniami wiatrowymi. Celem artykułu jest ocena ryzyka eksploatacji morskich elektrowni wiatrowych z punktu widzenia możliwości objęcia ich ochroną ubezpieczeniową. W opracowaniu omawiamy zasady ich funkcjonowania, towarzyszące im zagrożenia naturalne, a także ogólne warunki objęcia ich ochroną ubezpieczeniową, wskazując na przedmiot ubezpieczenia, zakres ubezpieczenia oraz sumę ubezpieczenia. Ponadto omawiamy w sposób ogólny warunki eksploatacji morskich elektrowni wiatrowych.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia; 2017, 51, 5
0459-9586
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Raschet prochnosti i ustojjchivosti kolonny morskojj vetroehnergeticheskojj ustanovki po pravilam DNV
Strength and stability calculations of offshore wind tower according to rules of DNV
Autorzy:
Ukho, V.
Powiązania:
https://bibliotekanauki.pl/articles/76620.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
stability
strength
structure
wind turbine
offshore wind
calculation
geometrical characteristics
comparative analysis
Opis:
The calculations of strength and stability of wind turbine tower according to actual loads have been made. The dimensions of main structure elements have been chosen. The comparative analysis of different tower types by weight and geometrical characteristics has been made.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 2
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł

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