Pub Date : 2022-09-01DOI: 10.17736/ijope.2022.jc861
Andre Ramiro Amorim, D. Karunakaran, Danilo Abreu Souza Lima, Gabriel Rombado, Boje Tveraaen
{"title":"An Efficient Methodology of Estimating the Extreme Response of Risers from Floaters in Multidirectional Sea States","authors":"Andre Ramiro Amorim, D. Karunakaran, Danilo Abreu Souza Lima, Gabriel Rombado, Boje Tveraaen","doi":"10.17736/ijope.2022.jc861","DOIUrl":"https://doi.org/10.17736/ijope.2022.jc861","url":null,"abstract":"","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48144932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.17736/ijope.2022.sh30
S. Jagdale, Q. Ma, S. Yan
The springing responses of a tension-leg-platform wind turbine (TLPWT) excited by the third-harmonic force of an extreme regular wave are investigated using an integrated (Aero-Hydro-Mooring) numerical model developed and presented in this paper. The model comprises a hybrid hydrodynamic model, which employs fully nonlinear potential theory (FNPT) for wave kinematic prediction and nondiffracting potential theory (NDPT) for wave force prediction, to simulate extreme wave and predict associated wave forces accurately and efficiently. Numerical simulation is carried out for the interaction of a floating TLPWT with waves. The focus is on the TLPWT motions, principally excited by higher-order harmonic wave forces. In particular, the springing responses generated by the third-order force at the triple wave frequency in regular waves are investigated, together with the wind turbine responses and tensions in the mooring lines.
{"title":"Springing Response of a Tension-Leg-Platform Wind Turbine Excited by Third-Harmonic Force in Nonlinear Regular Wave","authors":"S. Jagdale, Q. Ma, S. Yan","doi":"10.17736/ijope.2022.sh30","DOIUrl":"https://doi.org/10.17736/ijope.2022.sh30","url":null,"abstract":"The springing responses of a tension-leg-platform wind turbine (TLPWT) excited by the third-harmonic force of an extreme regular wave are investigated using an integrated (Aero-Hydro-Mooring) numerical model developed and presented in this paper. The model comprises a hybrid hydrodynamic model, which employs fully nonlinear potential theory (FNPT) for wave kinematic prediction and nondiffracting potential theory (NDPT) for wave force prediction, to simulate extreme wave and predict associated wave forces accurately and efficiently. Numerical simulation is carried out for the interaction of a floating TLPWT with waves. The focus is on the TLPWT motions, principally excited by higher-order harmonic wave forces. In particular, the springing responses generated by the third-order force at the triple wave frequency in regular waves are investigated, together with the wind turbine responses and tensions in the mooring lines.","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43479797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.17736/ijope.2022.jc857
Michael Binsar Lubis, M. Kimiaei
{"title":"Simplified Method on Obtaining Extreme Multidirectional Current Profile from a Current Database for Deep-water ROV Operation","authors":"Michael Binsar Lubis, M. Kimiaei","doi":"10.17736/ijope.2022.jc857","DOIUrl":"https://doi.org/10.17736/ijope.2022.jc857","url":null,"abstract":"","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41898213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.17736/ijope.2022.ak48
Y. Shimizu, M. Sugihara, K. Takeda, Wakaba Tsuruta
{"title":"Numerical Simulations on Liquefaction of Iron Ore Fines under Roll Motion of Bulk Carriers Using Fluid Coupling Scheme in DEM","authors":"Y. Shimizu, M. Sugihara, K. Takeda, Wakaba Tsuruta","doi":"10.17736/ijope.2022.ak48","DOIUrl":"https://doi.org/10.17736/ijope.2022.ak48","url":null,"abstract":"","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46225132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.17736/ijope.2022.jc867
Xu Chen, D. Jeng
{"title":"Oscillatory Seabed Responses Around Two Pipelines in Tandem Under Combined Wave and Current Loading","authors":"Xu Chen, D. Jeng","doi":"10.17736/ijope.2022.jc867","DOIUrl":"https://doi.org/10.17736/ijope.2022.jc867","url":null,"abstract":"","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45674687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.17736/ijope.2022.ik09
N. Tryaskin, E. Ermolaeva, K. D. Ovchinnikov, D. V. Nikushchenko, Dmitriy S Khmara, K. Kornishin, Yaroslav Efimov, A. V. Nesterov, A. A. Skutin
Some features of the movement of tabular icebergs during their towing are examined. A tabular iceberg towed in the Barents Sea in 2017, for which surveys of the underwater and surface parts were carried out, was selected for the analysis. As a result of numerical and physical modeling, the hydrodynamic characteristics of the iceberg were obtained for different motion courses; good convergence of the results of these methods was achieved. To determine each component, the numerical simulation, based on the equations of a viscous fluid motion, was carried out. Turbulent fluid flow is described by the Reynolds-averaged Navier–Stokes and continuity equations. The k – (cid:151) SST turbulence model is used to simulate turbulence. Numerical differentiation of the equations was performed in the open-source computational fluid dynamics software Open-FOAM. It is shown that the iceberg has several positions of stable and unstable equilibria in terms of the rotation around a vertical axis, and the influence of an iceberg’s orientation on additional resistance during rough seas is considered. Obtained results may be used in planning tabular iceberg towing in different regions of the world, as well as in further studies of iceberg behavior under load.
{"title":"Features of Tabular Iceberg Towing","authors":"N. Tryaskin, E. Ermolaeva, K. D. Ovchinnikov, D. V. Nikushchenko, Dmitriy S Khmara, K. Kornishin, Yaroslav Efimov, A. V. Nesterov, A. A. Skutin","doi":"10.17736/ijope.2022.ik09","DOIUrl":"https://doi.org/10.17736/ijope.2022.ik09","url":null,"abstract":"Some features of the movement of tabular icebergs during their towing are examined. A tabular iceberg towed in the Barents Sea in 2017, for which surveys of the underwater and surface parts were carried out, was selected for the analysis. As a result of numerical and physical modeling, the hydrodynamic characteristics of the iceberg were obtained for different motion courses; good convergence of the results of these methods was achieved. To determine each component, the numerical simulation, based on the equations of a viscous fluid motion, was carried out. Turbulent fluid flow is described by the Reynolds-averaged Navier–Stokes and continuity equations. The k – (cid:151) SST turbulence model is used to simulate turbulence. Numerical differentiation of the equations was performed in the open-source computational fluid dynamics software Open-FOAM. It is shown that the iceberg has several positions of stable and unstable equilibria in terms of the rotation around a vertical axis, and the influence of an iceberg’s orientation on additional resistance during rough seas is considered. Obtained results may be used in planning tabular iceberg towing in different regions of the world, as well as in further studies of iceberg behavior under load.","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47715744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.17736/ijope.2022.cl20
Ting-Yu Fan, Chin-Yu Lin, Chin-Cheng Huang
This paper is intended to study the influence of soil–structure interaction on the seismic response of jacket substructure for the Technical University of Denmark 10-MW reference wind turbine on the west coast of Taiwan. Since Taiwan is located in the circum-Pacific seismic belt, there is significant interest in assessing the behavior of a wind turbine subjected to seismic loading. Based on the flexible volume method, a finite element model was employed to quantify the contribution of foundation damping to overall damping of offshore wind turbines. The results show that foundation damping was estimated to contribute 1.28%–1.50% of critical damping to total offshore wind turbine damping. The soil–structure interaction effects have significant influence on seismic responses.
{"title":"Modeling the Influence of Soil-Structure-Interaction on Seismic Response of Jacket Substructure for the DTU 10MW Offshore Wind Turbine","authors":"Ting-Yu Fan, Chin-Yu Lin, Chin-Cheng Huang","doi":"10.17736/ijope.2022.cl20","DOIUrl":"https://doi.org/10.17736/ijope.2022.cl20","url":null,"abstract":"This paper is intended to study the influence of soil–structure interaction on the seismic response of jacket substructure for the Technical University of Denmark 10-MW reference wind turbine on the west coast of Taiwan. Since Taiwan is located in the circum-Pacific seismic belt, there is significant interest in assessing the behavior of a wind turbine subjected to seismic loading. Based on the flexible volume method, a finite element model was employed to quantify the contribution of foundation damping to overall damping of offshore wind turbines. The results show that foundation damping was estimated to contribute 1.28%–1.50% of critical damping to total offshore wind turbine damping. The soil–structure interaction effects have significant influence on seismic responses.","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46960412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.17736/ijope.2022.ak44
K. Fang, F. Yi, Jiantao Liu, Jia-wen Sun
In this study, a physical experiment is conducted in a wave flume to investigate the evolution process of a beach profile confronted by an artificial sandbar. Random waves with the JONSWAP spectrum are chosen to represent the storm wave condition. The time series of free surface elevation along the wave flume and equilibrium beach profile are acquired. The spatial variation of wave hydrodynamics, bar behavior, and morphological characteristics during the nourished beach profile evolution toward the equilibrium state is investigated. The effect of installation position, submerged depth, and median grain size of the artificial sandbar on beach erosion is discussed.
{"title":"Laboratory Study on the Effect of an Artificial Sandbar on Nourished Beach Profile Evolution","authors":"K. Fang, F. Yi, Jiantao Liu, Jia-wen Sun","doi":"10.17736/ijope.2022.ak44","DOIUrl":"https://doi.org/10.17736/ijope.2022.ak44","url":null,"abstract":"In this study, a physical experiment is conducted in a wave flume to investigate the evolution process of a beach profile confronted by an artificial sandbar. Random waves with the JONSWAP spectrum are chosen to represent the storm wave condition. The time series of free surface elevation along the wave flume and equilibrium beach profile are acquired. The spatial variation of wave hydrodynamics, bar behavior, and morphological characteristics during the nourished beach profile evolution toward the equilibrium state is investigated. The effect of installation position, submerged depth, and median grain size of the artificial sandbar on beach erosion is discussed.","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43446042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.17736/ijope.2022.jc856
I. Turnbull, T. King, F. Ralph
An iceberg drift model was developed for offshore oil and gas operations. Increasing forecasting accuracy is critical for making appropriate downtime decisions. Three sources of ocean current data were used to run test simulations of the model: estimates from observed iceberg drift and wind, measurements from a drifting buoy, and a three-dimensional (3D) ocean model. The average simulated iceberg position errors at 24 hours were 12% smaller for the estimated current drift simulations compared with the 3D modelled current simulations. The 17-hour iceberg position errors were 21% smaller for the buoy current drift simulation compared with the 3D modelled current simulation.
{"title":"Iceberg Drift Simulations Using Inferred, Measured, and Ocean Model Currents","authors":"I. Turnbull, T. King, F. Ralph","doi":"10.17736/ijope.2022.jc856","DOIUrl":"https://doi.org/10.17736/ijope.2022.jc856","url":null,"abstract":"An iceberg drift model was developed for offshore oil and gas operations. Increasing forecasting accuracy is critical for making appropriate downtime decisions. Three sources of ocean current data were used to run test simulations of the model: estimates from observed iceberg drift and wind, measurements from a drifting buoy, and a three-dimensional (3D) ocean model. The average simulated iceberg position errors at 24 hours were 12% smaller for the estimated current drift simulations compared with the 3D modelled current simulations. The 17-hour iceberg position errors were 21% smaller for the buoy current drift simulation compared with the 3D modelled current simulation.","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47664166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.17736/ijope.2022.jc851
K. Kornishin, Yaroslav Efimov, P. A. Tarasov, Sergey Kovalev, A. Bekker, Alexander M Polomoshnov
The article investigates dependences of flat ice strength properties in the Kara, Laptev and East Siberian seas on ice structure and physical parameters (first of all, on the ice temperature). Research was based on the array of experimental data on the flat ice properties studied during 2013-2017 expeditions in the Kara, Laptev and East Siberian seas and 2016-2019 work on the research site in the Khatanga bay of the Laptev sea. Analysis of various ice strength characteristics showed similarity of ice in the Russian Arctic seas and in the Pacific Ocean. The differences in the ice strength properties at different loading rates were determined, and the variation coefficients of ice strength parameters were estimated. Dependences on ice temperature were obtained for all ice strength characteristics, and show a good approximation that can be described by a linear law. Indenter and compressive strength correlations were reformed for various types of first-year ice. Regression equations were determined in order to estimate the bending strength of ice consoles; anomalous behavior of Young's modulus of ice was observed during tests of consoles. Results of the work can be used for calculating ice loads on offshore structures, as well as for assessing icebreaking capacity of vessels passing the Northern Sea Route.
{"title":"Correlation Dependences of Level Ice Strength Properties in the Kara, Laptev, and East Siberian Seas","authors":"K. Kornishin, Yaroslav Efimov, P. A. Tarasov, Sergey Kovalev, A. Bekker, Alexander M Polomoshnov","doi":"10.17736/ijope.2022.jc851","DOIUrl":"https://doi.org/10.17736/ijope.2022.jc851","url":null,"abstract":"The article investigates dependences of flat ice strength properties in the Kara, Laptev and East Siberian seas on ice structure and physical parameters (first of all, on the ice temperature). Research was based on the array of experimental data on the flat ice properties studied during 2013-2017 expeditions in the Kara, Laptev and East Siberian seas and 2016-2019 work on the research site in the Khatanga bay of the Laptev sea. Analysis of various ice strength characteristics showed similarity of ice in the Russian Arctic seas and in the Pacific Ocean. The differences in the ice strength properties at different loading rates were determined, and the variation coefficients of ice strength parameters were estimated. Dependences on ice temperature were obtained for all ice strength characteristics, and show a good approximation that can be described by a linear law. Indenter and compressive strength correlations were reformed for various types of first-year ice. Regression equations were determined in order to estimate the bending strength of ice consoles; anomalous behavior of Young's modulus of ice was observed during tests of consoles. Results of the work can be used for calculating ice loads on offshore structures, as well as for assessing icebreaking capacity of vessels passing the Northern Sea Route.","PeriodicalId":50302,"journal":{"name":"International Journal of Offshore and Polar Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41376175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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