Relevant bibliographies by topics / Ship resistance

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Ship resistance'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Ship resistance"

1

He, Ngo Van, Keisuke Mizutani, and Yoshiho Ikeda. "REDUCING AIR RESISTANCE ACTING ON A SHIP BY USING INTERACTION EFFECTS BETWEEN THE HULL AND ACCOMMODATION." ASEAN Engineering Journal 7, no. 1 (December 26, 2014): 1–14. http://dx.doi.org/10.11113/aej.v7.15484.

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Nowaday, a study on saving energy as well as reducing resistance acting on a ship is important in maritime transportation. In this study, the authors present a study on reducing air resistance acting on a ship by using interaction effects between the hull and an accommodation. At first, air resistances acting on a hull and an accommodation of the ship are investigated by a commercial Computation Fluid Dynamic (CFD) code. Then, CFD results are compared with those of experimental results to validate the accuracy of the CFD. Secondly, air resistances acting on the ship with an accommodation on its deck are computed to obtain air resistances acting on the whole ships, on the hull and on accommodation. The results demonstrate that the interaction effects between the hull and its accommodation house be also shown how to reduce the total air resistance by using interaction effects between the hull and an accommodation house. The results can be applied in reducing the total resistances acting on a ship.
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Yang, Yunfei, Zhicheng Zhang, Jiapeng Zhao, Bin Zhang, Lei Zhang, Qi Hu, and Jianglong Sun. "Research on Ship Resistance Prediction Using Machine Learning with Different Samples." Journal of Marine Science and Engineering 12, no. 4 (March 26, 2024): 556. http://dx.doi.org/10.3390/jmse12040556.

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Resistance serves as a critical performance metric for ships. Swift and accurate resistance prediction can enhance ship design efficiency. Currently, methods for determining ship resistance encompass model tests, estimation techniques, and computational fluid dynamics (CFDs) simulations. There is a need to improve the prediction speed or accuracy of these methods. Machine learning is gradually emerging as a method applied in the field of ship research. This study aims to investigate ship resistance prediction methods utilizing machine learning across various datasets. This study proposes two methods: employing stacking ensemble learning to enhance resistance prediction accuracy with identical ship samples and utilizing various ship resistance prediction models for accurate resistance prediction through transfer learning. Initially focusing on container ships as the research subject, the stacking ensemble learning model outperforms the basic machine learning model, the Holtrop and Mennen method, and the updated Guldhammer and Harvald method based on comparative prediction results. Subsequently, the container ship resistance prediction model achieves precise resistance prediction for bulk carriers. This study offers dependable guidance for applying machine learning in predicting ship hydrodynamic performance.
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Gutiérrez-Romero, José Enrique, and Jerónimo Esteve-Pérez. "Assessment of the Influence of Added Resistance on Ship Pollutant Emissions and Freight Throughput Using High-Fidelity Numerical Tools." Journal of Marine Science and Engineering 10, no. 1 (January 10, 2022): 88. http://dx.doi.org/10.3390/jmse10010088.

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The reduction of ship pollutants is a key issue in the international agenda. Emissions estimation is usually based on standard calculations that consider the different scenarios of ships. This work presents research on the influence of added resistance on ship emissions and freight throughput. First, a methodology to assess the added resistance influence is shown. The procedure is applied to a roll on-roll off ship under two load conditions. Analyses are computed to value wind- and wave-added resistances for different seasons. An investigation on ship pollutant emissions for a whole route is performed. Moreover, the influence of added resistance on the ship freight throughput is analyzed. Finally, some relevant information is concluded. For instance, a difference of up to 53% in pollutant emission estimation is observed if added resistance is considered. Additionally, the navigation in added resistance conditions could lead to a freight loss of 18% per operational year.
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Huang, Jiayu, Feng Diao, Shifeng Ding, Sen Han, Pentti Kujala, and Li Zhou. "A Study on the Ice Resistance Characteristics of Ships in Rafted Ice Based on the Circumferential Crack Method." Water 16, no. 6 (March 15, 2024): 854. http://dx.doi.org/10.3390/w16060854.

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In previous studies of ship–ice interactions, most studies focused on ship–level ice interactions, overlooking potential rafted ice conditions in extreme ice conditions. The purpose of this study is to develop a numerical model for predicting ship resistance in rafted ice regions. Numerical modeling of rafted ice was carried out using preset grid cells. By comparing the model test results, the accuracy and reliability of the numerical model are verified. On this basis, we undertook the analysis of the impacts of different ice thicknesses, ship speeds, bending strengths, and crushing strengths on the ice resistance of ships under level and rafted ice conditions. The results show that the ice resistance of ships is significantly higher than that of rafted ice under the condition of level ice; however, level ice and rafted ice have different effects on ship ice resistance. Compared with level ice, the ice resistance of ships navigating in rafted ice is more concentrated. The findings of the present research can serve as a technical reference for studies focused on predicting ship resistance in rafted ice regions.
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Ismail, Izzuddin Nadzir, Parlindungan Manik, and Mahendra Indiaryanto. "Effect of the Addition of Hydrofoil on Lift Force and Resistance in 60 M High-Speed Vessel." Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 17, no. 3 (October 1, 2020): 95–106. http://dx.doi.org/10.14710/kapal.v17i3.28772.

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The development of sea transportation technology is needed to meet the demand for ships that can carry heavier loads and operate at high speeds. Modifications in the form of additional hydrofoil variations were conducted to produce higher lift and reduce the resistance generated by the ship so that the ship can go more efficiently at high speed. This study aims to obtain the effect of adding hydrofoil to ships with variations in the type and shape of foil and find out which types and shapes can reduce resistance on the ship. This research was conducted with several model analysis tests using Computational Fluid Dynamic (CFD) based software, namely Tdyn, at several different speeds. The results of this study show that of the six variation models analyzed, rectangular fully submerged foil models can reduce the total resistance value of the ship by 17.822% from the original ship on Froude Number (Fr) 0.670. The type and shape of the foil is very influential on the lift and resistance produced by the ship.
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Jin, Chenhao. "Review on the ship drag reduction technology." Theoretical and Natural Science 19, no. 1 (December 8, 2023): 275–80. http://dx.doi.org/10.54254/2753-8818/19/20230574.

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The development of the theory of turbulence has made a breakthrough in the application of drag reduction technology on ships, which contributes to energy saving and environmental protection. When a ship is sailing, it has to overcome resistance. Total resistance includes frictional resistance, wave-making resistance, and viscous pressure resistance, in which frictional resistance acts as the main resistance for low-speed ships, and for high-speed ships, the main resistance is wave-making resistance. This paper reviews the ship drag reduction technology by giving a brief introduction to drag reduction methods using grooves, bulbous bows, bubbles, hydrofoils, wall vibration, and high-polymer additive respectively, as well as their principles.
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Xie, Chang, Li Zhou, Mingfeng Lu, Shifeng Ding, and Xu Zhou. "Numerical Simulation Study on Ship–Ship Interference in Formation Navigation in Full-Scale Brash Ice Channels." Journal of Marine Science and Engineering 11, no. 7 (July 5, 2023): 1376. http://dx.doi.org/10.3390/jmse11071376.

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Formation navigation in brash ice channels is increasingly utilized by merchant vessels in the Arctic and Baltic Sea, offering benefits such as improved efficiency and reduced carbon emissions. However, ship–ship interference poses a significant challenge to this method, impacting resistance performance. This paper presents full-scale simulations using the CFD–DEM coupling method in brash ice channels, which is validated by comparing simulation results with ice tank measurements. By varying the distance between two ships from 0.05 to 5 ship lengths, ship–ship interference in full-scale brash ice channels is analyzed using the CFD–DEM coupling strategy. The study examines hydrodynamic and ship–ice interactions, ice resistance effects, and simulation results. It is found that ship-to-ship distance significantly influences the velocity field, dynamic pressure distribution on the hull, and hydrodynamic interaction forces. Distances less than one ship length result in increased water resistance for the forward ship and decreased resistance for the rear ship. The forward ship demonstrates favorable interference with the ice accumulation of the rear ship. When distances are less than two ship lengths, the ice resistance of the forward ship remains mostly unaffected, while the ice resistance of the rear ship decreases as the distance decreases. These insights enhance our understanding of ship–ship interference in formation navigation, aiding in the optimization of brash ice channel navigation strategies.
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Xu, Xiao Ying, Chao Ying Meng, and Kuan Wang. "Resistance Performance Forecast of Trimaran Based on Multiple Regression Analysis." E3S Web of Conferences 261 (2021): 02072. http://dx.doi.org/10.1051/e3sconf/202126102072.

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Based on the multiple linear regression of the relevant data of 29 ships in the basic database, including cargo ship, oil ship, container ship and chemical ship, etc, the empirical estimation formula of resistance coefficient of single ship under different Fr was obtained. The feasibility of applying the above regression formula to the prediction of the resistance performance of the trimaran based on DTMB5415 is verified by comparison with CFD simulation data. This method has a strong engineering applicability and provides a new idea for the study of computer-aided layout optimization of the trimaran.
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Rachmianty, Andi, Suandar Baso, and Syamsul Asri. "The Influences of Lengthening Dimension of Ro-Ro Ferry Toward the Considerations of Hydrodynamics Characteristic and Loading Capacity Aspect." EPI International Journal of Engineering 2, no. 1 (June 27, 2019): 41–45. http://dx.doi.org/10.25042/epi-ije.022019.08.

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The ferry business has become an important business segment for ship designers, builders and operators. Therefore, many ways have been done in order to increase ferry business through the proper design or converting ships by lengthening. This research is focused on the influences of lengthening a Ro-Ro ferry to hydrodynamics characteristic and loading capacity aspects. Moreover, the ships also are fixed in the same width and draft dimensions. The difference of the Ro-Ro ferries length is indicated by the addition of one column of car space where one column car space is given by car size including distance between car columns spaces which is an increment of every 5.88 meter. The total resistances of Ro-Ro ferries are obtained by ship model experiment in towing tank. There are 4 ship models that are made. The lengthening a Ro-Ro ferry is described into non-dimensional parameter by the ratio of ship length and displacement volume (L/V1/3). The hydrodynamics and the loading capacity of carried car aspects could be described into the ratio of resistance and loading capacity of carried car (RT/SUK) with ship speed. The research result shows that the lengthening of a Ro-Ro ferry affects on total resistance, speed, and loading capacity of carried car. The increase of total resistance is caused by higher residual resistance at high speeds and this is experienced by small length size. Therefore by lengthening the Ro-Ro ferry it could reduce total resistance in the same speed especially the residuary resistance but eventhough lengthening Ro-Ro ferry the effective speed should be considered. In additions, the effective speed for actual ships dimension in the same Rt/SUK 0.05 i.e. B5L10 is about 13.85 knot, B5L11 14.33 knot, B5L12 14.94 knot, and B5L13 15.45 knot respectively.
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Martić, Ivana, Nastia Degiuli, Andrea Farkas, and Ivan Gospić. "Evaluation of the Effect of Container Ship Characteristics on Added Resistance in Waves." Journal of Marine Science and Engineering 8, no. 9 (September 9, 2020): 696. http://dx.doi.org/10.3390/jmse8090696.

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Added resistance in waves is one of the main causes of an increase in required power when a ship operates in actual service conditions. The assessment of added resistance in waves is important from both an economic and environmental point of view, owing to increasingly stringent rules set by the International Maritime Organization (IMO) with the aim to reduce CO2 emission by ships. For that reason, it is desirable to evaluate the added resistance in waves already in the preliminary ship design stage both in regular and irregular waves. Ships are traditionally designed and optimized with respect to calm water conditions. Within this research, the effect of prismatic coefficient, longitudinal position of the centre of buoyancy, trim, pitch radius of gyration, and ship speed on added resistance is investigated for the KCS (Kriso Container Ship) container ship in regular head waves and for different sea states. The calculations are performed using the 3D panel method based on Kelvin type Green function. The results for short waves are corrected to adequately take into account the diffraction component. The obtained results provide an insight into the effect of variation of ship characteristics on added resistance in waves.
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Dissertations / Theses on the topic "Ship resistance"

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Sen, Sharma Pradeep Kumar. "Sensitivity analysis of ship longitudinal strength." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45183.

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The present work addresses the usefulness of a simple and efficient computer program (ULTSTR) for a sensitivity analysis of ship longitudinal strength, where this program was originally developed for calculating the collapse moment. Since the program is efficient it can be used to obtain ultimate strength variability for various values of parameters which affects the longitudinal strength, viz., yield. stress, Young's modulus, thickness, initial imperfections, breadth, depth, etc. The results obtained with this approach are in good agreement with those obtained by use of a more complex nonlinear finite element program USAS, developed by American Bureau of Shipping.
Master of Science
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Voxakis, Petros. "Ship hull resistance calculations using CFD methods." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74895.

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Thesis (Nav. E. and S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 77-78).
In past years, the computational power and run-time required by Computational Fluid Dynamics (CFD) codes restricted their use in ship design space exploration. Increases in computational power available to designers, in addition to more efficient codes, have made CFD a valuable tool for early stage ship design and trade studies. In this work an existing physical model (DTMB #5415, similar to the US Navy DDG-51 combatant) was replicated in STAR-CCM+, initially without appendages, then with the addition of the appendages. Towed resistance was calculated at various speeds. The bare hull model was unconstrained in heave and pitch, thus allowing the simulation to achieve steady dynamic attitude for each speed run. The effect of dynamic attitude on the resistance is considered to be significant and requires accurate prediction. The results were validated by comparison to available data from tow tank tests of the physical model. The results demonstrate the accuracy of the CFD package and the potential for increasing the use of CFD as an effective tool in design space exploration. This will significantly reduce the time and cost of studies that previously depended solely on physical model testing during preliminary ship design efforts.
by Petros Voxakis.
Nav.E.and S.M.
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Thorsen, Ingvill Bryn. "Estimation and Computation of Ice-Resistance for Ship Hulls." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18757.

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The oil price continues to increase while oil companies search for oil in new areas. There is assumed that 25% of the world’s hydrocarbons are located in the arctic area. Operating in these areas will be a huge challenge due to extreme low temperatures and ice condition Today one can predict with good accuracy how a ship will manage in different ice condition. Research on ship operating in ice the last decades has resulted in many different formulas for predicting ice resistance on a ship hull. Analytical and numerical methods are developed to estimate the resistance working on the ship hull under different ice conditions. Model test will still be the most accurate prediction, but the other methods may give you some guidelines on what to expect. This thesis contain a theoretically study of ice physics and mechanics. The formation and development of sea ice has been reviewed. The Ice Load Monitoring system tested on the Norwegian coast guard vessel KV Svalbard is described. Three different analytical ice resistance calculation methods are described. The three methods are Lindqvist (1989), Keinonen et al. (1996) and Riska et al. (1997). Data obtained from the Ice Load Monitoring system are used to estimate the full scale ice resistance on KV Svalbard. The three analytical methods are calculated with KV Svalbard as a reference ship to be able to compare with the full scale measurements. MATLAB is used for the calculations.
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Peng, Hongxuan. "Numerical computation of multi-hull ship resistance and motion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63482.pdf.

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Johnson, Brian (Brian David). "Resistance and wake prediction for early stage ship design." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85527.

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Thesis: S.M. in Naval Architecture and Marine Engineering, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 75-76).
Before the detailed design of a new vessel a designer would like to explore the design space to identify an appropriate starting point for the concept design. The base design needs to be done at the preliminary design level with codes that execute fast to completely explore the design space. The intent of this thesis is to produce a preliminary design tool that will allow the designer to predict the total resistance and propeller wake for use in an optimization program, having total propulsive efficiency as an objective function. There exist design tools to predict the total resistance and propeller wake, but none that provide adequate computational times for the preliminary design stage. The tool developed uses a potential flow solution coupled with an integral boundary layer solver to predict the viscous resistance and propeller wake. The wave drag is calculated using a modified linear theory, thus eliminating the need to run fully three-dimensional free surface CFD codes. The tool developed is validated against published Series 60 test data.
by Brian Johnson.
S.M. in Naval Architecture and Marine Engineering
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Petersson, Emil. "Study of semi-empirical methods for ship resistance calculations." Thesis, Uppsala universitet, Tillämpad mekanik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413700.

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In the early ship design process a quick overview of which shipdesign that could be the optimal choice for the intended usage needsto be investigated. Therefore the feasibility and accuracy ofinterpolating between measurement data from model resistance serieswhen estimating unknown hulls were conducted. A parametric study wasundertaken in order to investigate which parameters carry the mostimportance in regard to calm water resistance for semi-displacinghulls. In order to asses the whole estimation process one semidisplacing ship (FDS-5) and one bulk carrier with a bulbous bow (JBC)were estimated in regard to calm water resistance by using semiempirical methods and were later compared with CFD results. The CFDresults came from a in part parallel conducted work. The resultsshowed that it is possible to estimate the total resistance withsemi-empirical methods to an unknown hull by linear interpolationwith an accuracy of below 5% in the designed speed interval both forFDS-5 and JBC. The CFD simulations achieved a lower accuracy comparedto the semi-empirical approach, however by furhter calibrating themodels, the accuracy could potentially be improved. Linearinterpolation between two hulls in order to estimate an unknown hull,is only advised when the hulls are nearly identical. Meaning that thehulls must be of the same ship type and that only one parameter isallowed to differ compared to the unknown hull. The parametric studyresulted in parameter importance in falling order: Slenderness ratio,length-beam ratio, longitudinal prismatic coefficient, blockcoefficient and beam-draught ratio. Even though the CFD approach notyet is completely reliable, it could still be a useful complement tothe semi-empirical approach by calculating parameters such as adynamic wetted surface, resistance due to appendages or airresistance of the full-scale ship. Simply by incrementally increasingthe accuracy of individual resistance components an overallimprovement could potentially be achieved.
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Cooke, Robert. "An experimental investigation into the components of ship resistance." Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/15823.

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This thesis is an experimental investigation into the components of ship resistance. The traditional Froude method of scaling is investigated with reference to the measurement of skin friction and viscous pressure resistance. A literature review is given on the theoretical background and experimental measurement techniques. Two models are used for the experimental work, which sizes are in the geometric ratio of 2,7 to 1. The model form is half a body of revolution with a vertical sided superstructure. The block coefficient of the model is 0,621 and the length to beam ratio is 7. Two surface models and one reflex model are tested. One of the models has 40 pressure tappings located on its hull which are used to measure the total pressure resistance of the model. The components of resistance directly measured are total resistance, total viscous resistance and total pressure resistance. The resistance components inferred are skin friction resistance and wave-making resistance. The deduced skin friction is found to deviate from the Prandtl-von Karman skin friction formulation. The wave-making resistance agrees favourably with the predicted values using Mitchell's integral. The total viscous resistance increases sharply at Reynolds numbers greater than 3 x 10⁶.
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Xu, Jinsong. "Estimation of wave-induced ship hull bending moment from ship motion measurements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0029/NQ62460.pdf.

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Utama, I. Ketut Aria Pria. "Investigation of the viscous resistance components of catamaran forms." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297613.

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Tregde, Vidar. "Aspects of ship design: optimization of aft hull with inverse geometry design." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-134.

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The main contribution of this thesis is on the study of optimization methods in aft hull design. The optimization methods are inverse geometry design methods to find an aft hull with the flow velocities we specify. The analytic foundation for the flow is given by Stratford in [31], and gives a prescribed velocity distribution on the aft body. With the parameter β we have adjusted this flow to have a certain margin to separation along the pressure recovery region.

This principle and optimization method are successfully applied to design of ships with pram-type aft hull. The 2D optimized profiles corresponds to centerline buttock, and 3D hull sections are extended from this centerline buttock with a bilge radius.

Stratfords original pressure distribution for pressure recovery region were meant for Reynolds numbers up to 107. We have extended Stratfords formula to yield for ship full scale Reynolds numbers to 109.

Different optimization methods were programmed and tested. The best routine for our optimization of aft hull with Stratford flow, was when the offset y-value were the optimization parameter to be changed. When we tried to optimize a complete 2D profile with a given pressure distribution, it worked best to use the variables in a B-spline as the optimization parameter.

Extensive windtunnel tests and towing tank tests are carried out. The tests verified the hydrodynamic properties of the hulls.

Towing tests indicates that the optimized hull lines have lower total resistance than conventional ships with the same main dimensions. Both the frictional, viscous pressure resistance and wave making resistance are significantly lower. Further we can increase cargo capacity with the same power consumption, and achieve a more favourable distribution of the displacement in the aft hull.

This study has shown us that the slant angle for the bottom of the aft hull should not excess 15º with horizontal plane due to danger of separation over the bilge, and longitudinal vortices forming.

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Books on the topic "Ship resistance"

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C, Raven Hoyte, and Paulling J. Randolph, eds. Ship resistance and flow. Jersey City, N.J: Society of Naval Architects and Marine Engineers, 2010.

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Aa, Harvald Sv. Resistance and propulsion of ships. Malabar, Fla: Krieger Pub., 1992.

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R, Turnock Stephen, and Hudson Dominic A, eds. Ship resistance and propulsion: Practical estimation of ship propulsive power. New York: Cambridge University Press, 2011.

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Ionov, B. P. Ledovoe soprotivlenie i ego sostavli͡a︡i͡u︡shchie. Leningrad: Gidrometeoizdat, 1988.

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Gerritsma, J. Motions, wave loads and added resistance in waves of two Wigley hull forms. Delft, Netherlands: Technische Universiteit Delft, Vakgroep, 1988.

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Canada. Defence Research Establishment Atlantic. Fortran Program For Fast Surface Ship Resistance and Power Estimation: Version 3. S.l: s.n, 1985.

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Materials, United States Congress House Committee on Armed Services Subcommittee on Seapower and Strategic and Critical. Ship survivability: Hearings before the Seapower and Strategic and Critical Materials Subcommittee of the Committee on Armed Services, House of Representatives, One Hundredth Congress, first and second sessions, hearings held October 15, 1987 and March 15, 1988. Washington: U.S. G.P.O., 1988.

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United States. Congress. House. Committee on Armed Services. Subcommittee on Seapower and Strategic and Critical Materials. Ship survivability: Hearings before the Seapower and Strategic and Critical Materials Subcommittee of the Committee on Armed Services, House of Representatives, One Hundredth Congress, first and second sessions, hearings held October 15, 1987 and March 15, 1988. Washington: U.S. G.P.O., 1988.

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Daidola, John C. Hydrodynamic impact on displacement ship hulls: An assessment of the state of the art. Washington, D.C: Ship Structure Committee, 1995.

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Dillard, J. M. Resistance. New York: Pocket Books, 2007.

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Book chapters on the topic "Ship resistance"

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Roh, Myung-Il, and Kyu-Yeul Lee. "Prediction of Resistance and Power." In Computational Ship Design, 37–57. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4885-2_5.

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Zou, Lu, and Lars Larsson. "Additional Data for Resistance, Sinkage and Trim." In Numerical Ship Hydrodynamics, 255–64. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7189-5_6.

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Zou, Lu, and Lars Larsson. "A Verification and Validation Study Based on Resistance Submissions." In Numerical Ship Hydrodynamics, 203–54. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7189-5_5.

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Kim, Jin. "Experimental Data for KCS Resistance, Sinkage, Trim, and Self-propulsion." In Numerical Ship Hydrodynamics, 53–59. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47572-7_3.

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Kan, Jinyu, Lizheng Wang, Jialun Liu, Xuming Wang, and Bing Han. "Numerical Investigation of an Inland 64 TEU Container Vessel in Restricted Waters." In Lecture Notes in Civil Engineering, 516–28. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_45.

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AbstractCompared with sea-going ships, inland vessels mostly sail in restricted waters, which may cause resistance and ship motions to change greatly. To ensure the safety of navigation, it is of great importance to study the hydrodynamic performance of inland vessels navigating in restricted waters. A 64 Twenty-feet Equivalent Unit (TEU) container vessel is numerically simulated at different speeds and water depth draft ratios (water depth/draft = 2, 2.5, 3, 4, 5, 16). The numerical methods are firstly verified and then applied to systematic simulations. The resistance components, ship motions, and details of flow fields are calculated and analyzed. Generally, the total, frictional and residual resistance coefficients increase with a decrease of water depth as expected. However, at relatively low speeds (Fr = 0.1129 and 0.1135) of h/T = 2, 2.5, 3, the resistance components change conversely that they decrease as the water depth gets shallower. This special phenomenon may be caused by the design of the ship hull or the use of the turbulence model that may not be appropriate. The residual resistance has the same trend as the total resistance and the lines are nearly parallel, which shows that the residual resistance is dominant in the component of total resistance. The ship squat phenomenon happens but is not severe in the shallowest condition (h/T = 2). With the water depth decreasing, the wave amplitude becomes larger and the wave crests near the ship bow and stern also increase, while the troughs change slightly at different water depths.
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Larsson, Lars. "Evaluation of Resistance, Sinkage, Trim and Wave Pattern Predictions for JBC." In Numerical Ship Hydrodynamics, 139–57. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47572-7_5.

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Kim, Jin. "Evaluation of Resistance, Sinkage, Trim and Self-propulsion Predictions for KCS." In Numerical Ship Hydrodynamics, 311–31. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47572-7_8.

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Xie, W., S. D. Xu, N. N. Zhang, X. Yue, J. Liu, and S. H. Lu. "Study on the Economic Speed of the Grand Canal in North Jiangsu." In Lecture Notes in Civil Engineering, 938–50. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_83.

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AbstractThe energy conservation and emission reduction have been the development trend of various industries. However, the carbon emissions of the shipping industry are increasing year by year. Optimizing ship energy consumption is an important task to develop environment-friendly shipping and reduce the operating cost of shipping companies. Speed is one of the most critical factors affecting ship energy consumption. Many studies confirm that it is an efficient way to save ship energy consumption by obtaining appropriate speed and reducing ship energy consumption. Compared with rivers and oceans, inland canals have the characteristics of shallow water depth, narrow width and low water velocity. This paper analyzed the low-energy operation scheme of canal ships with the research object of the canal ships in North Jiangsu. The main factors affecting the energy consumption and the ship resistance were analyzed. Accordingly, the mathematical model of ship energy consumption, ship speed and environmental factors was established. The optimized economic ship speed was then calculated by calling the optimization algorithm guided by the lowest ship energy consumption. It is verified by an example of ships in the North Jiangsu Grand Canal. Applying the optimized economic speed to actual ship navigation can effectively reduce the ship fuel consumption, which is of great significance to achieve the goal of energy conservation and emission reduction.
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Larsson, Lars, and Lu Zou. "Evaluation of Resistance, Sinkage and Trim, Self Propulsion and Wave Pattern Predictions." In Numerical Ship Hydrodynamics, 17–64. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7189-5_2.

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Sanada, Yugo, Claus Simonsen, Janne Otzen, Hamid Sadat-Hosseini, Yasuyuki Toda, and Frederick Stern. "Experimental Data for KCS Added Resistance and ONRT Free Running Course Keeping/Speed Loss in Head and Oblique Waves." In Numerical Ship Hydrodynamics, 61–137. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47572-7_4.

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Conference papers on the topic "Ship resistance"

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Guo, Bingjie, Bjørn-Johan Vartdal, and Sverre Steen. "A Novel Measure to Reduce Ship Resistance in Waves." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61949.

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Ships travel in waves most of the time. The horsepower increase or speed loss in waves can become large in adverse sea. Speed loss needs to be compensated for by increasing the power. Moreover, the associated speed-loss can possibly not be compensated due to the limit of installed power. This will cause delays, and may even lead to safety concerns in maneuvering. Thus, there is a need for minimizing added resistance due to both economical and safety reasons. Ships with better performance in waves even with reduced power are desired. Latest researches on advanced ship optimization are taking added resistance into account. Ship bow optimization has been the main measure to reduce added resistance in waves. Based on analyzing the working principles and potential benefit of the different kinds of novel ship bows, a novel measure is proposed to reduce the ship resistance in waves is proposed. A novel measure to reduce the ship resistance in waves of existing ships by installing a simple structure at the ship bow. The structure is designed to sharpen the ship bow and therefore reduce added resistance due to wave reflection. Thus, it is suitable for the large tankers and bulk carriers, which have blunt bows. The volume above free surface was expected to reduce ship motions and the added resistance due to ship motions consequently. This measure does not change the original ship design. It can be retrofitted on existing ships fairly easily at low cost. In order to verify the benefit due to the retrofitted structure, CFD simulations are performed in both head and oblique waves, which can take 3D effect into account. Four different retrofitted structures are designed and the numerical simulations are performed with the same numerical and mesh settings in each wave condition. The CFD simulation results confirm that the novel measure can reduce ship added resistance efficiently and it also has benefits in oblique waves.
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Tsubogo, Takashi. "Potential of Michell’s Integral for Ship Wave Resistance." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24449.

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The Michell’s integral (Michell 1898) for the wave making resistance of a thin ship has not been used widely in practice, since its accuracy is questioned especially for a Froude number range about 0.2 to 0.35 for conventional ships. We examine calculations by Michell’s integral for some ship forms, e.g. a parabolic strut, Wigley hull and so on. As a result, one reason of the disagreement with experiments is revealed. It must be the gradient of hull form in the depth direction. Then a thin ship theory including the hull gradient effect in the depth direction is presented, which improves slightly in low Froude numbers but needs more computing time than Michell’s integral so as to solve a boundary integral equation.
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Park, Kyung Duk, and Hyun Soo Kim. "Study on the Ship Ice Resistance Estimation Using Empirical Formulas." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23971.

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The ice resistance estimation technique for icebreaking ships has been studied intensively over recent years to meet the need of arctic vessel design. Before testing in the ice model basin, the estimation of ship ice resistance with high reliability is very important to decide the delivered power necessary for level ice operation. The main idea of this study came from several empirical formulas by B.P. Ionov[1], E. Enkvist[2] and J.A. Shimanskii[3], in which ice resistance components such as icebreaking, buoyancy and clearing resistances were represented by the integral equations along the DLWL (Design Load Water Line). However, this study proposes modified methods considering the DLWL shape as well as the hull shape under the DLWL. In the proposed methodology, the DLWL shape for icebreaking resistance and the hull shape under the DLWL for buoyancy and clearing resistances are included in the calculation. Especially when calculating clearing resistance, the flow pattern of ice particles under the DLWL of ship is assumed to be in accordance with the ice flow observed from ice model testing. This paper also deals with application examples for a ship design and its ice model test results at the Aker arctic ice model basin. From the comparison of results from the model test and the estimation, the reliability of this estimation technique is discussed.
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Sun, Qianyang, Li Zhou, Shifeng Ding, Renwei Liu, Aimin Wang, and Jiaming Chen. "Ice Resistance Prediction Using Explainable Deep Learning Method." In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-102855.

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Abstract Accurate prediction of ice resistance plays an important role in ensuring the safety of ship navigation when sailing in ice regions. In recent years, machine learning has been widely applied in the field of ships, among which deep learning is a common method. This study combines the scientific problems of ice resistance for ice-ship design closely, focusing on the design of a deep learning network for predicting the resistance of ice-sailing ships, proposes a Graph Neural Network method to predict ship resistance in ice area based on different data preprocessing methods. The predicted response and real response of the network, the feature weight relationship of the network and the prediction error are shown in the form of a graph. This study refers to the traditional semi-empirical formula, selects appropriate input features (ship design parameters and ice mechanic properties). The neural network is trained through the ship model test data. Different data preprocessing methods are selected to analyze the error of network prediction results, and the generalization ability and fitting effect of the network are evaluated. This work will provide reference for ice-sailing ship.
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Huang, Luofeng, Fang Li, and Minghao Li. "Simulation of a Ship Advancing in Pre-Sawn Ice." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-80106.

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Abstract Pre-sawn ice test is the standard testing method to negate ice-breaking resistance from the whole resistance of a ship breaking level ice, which is of great importance for understanding ship-ice interactions and predicting various sea-ice loads on ships. This work has developed a computational model that can realistically simulate a ship advancing in a pre-sawn ice channel. The model applies Computational Fluid Dynamics to solve ship hydrodynamics, which is coupled with a novel particle-bonded Discrete Element Method to model pre-sawn ice pieces. Experiments were also conducted to validate the simulations. Upon validation, analyses were performed to investigate the ship-ice interaction. It was demonstrated that the pre-sawn ice resistance’s speed dependence has three regimes: for low ship speeds, the ice resistance slightly increases with decreased speed due to ice piling up; for middle ship speeds, the ship-ice interaction could remain similar and there is no distinctive change in the ice resistance; for high ship speeds, ice resistance evidently increases with increasing ship speed, which results from strong ship-ice collisions that cause ice pieces to move dramatically.
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van der Werff, Solange, Joris Brouwer, and Gerco Hagesteijn. "Ship Resistance Validation Using Artificial Ice." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41804.

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In 2013, the first model tests with artificial ice were performed in MARIN’s Concept Basin. A ‘fishbone’ type of channel was made out of rigid polypropylene (PP) particles, surrounded by large rigid PP plates, creating a testing case that is similar to pre-sawn ice conditions in refrigerated model test facilities. A subsequent testing campaign is done in 2014, where the friction between hull and artificial ice particles is further investigated. Besides measurements of the resistance of the model ship, video images above and under water are used in this study. Results are compared with formulations such as Lindqvist. The knowledge gained with this study is used to improve MARIN’s hydrodynamic multi-body tool aNySIM for simulation studies with ice particles represented by rigid, unbreakable bodies.
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Liang, Hong, Zhu Chuan, and Miao Ping. "Calculation and Analysis of Components of Added Resistance of Ships in Waves." In SNAME 5th World Maritime Technology Conference. SNAME, 2015. http://dx.doi.org/10.5957/wmtc-2015-100.

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Ship motions and its hydrodynamic coefficients are solved by three dimensional frequency domain potential theories with a translating and pulsating source distribution method. Furthermore, components of added wave resistance of ships advancing in waves due to the radiation and diffraction waves are obtained respectively. Added wave resistances of Wigley III hull and S175 containership with various forward speeds are carried out and analyzed in frequency domain. The numerical results are validated for the models by comparing them with experimental data. Its percentage of components of the total ship added wave resistance varying with frequency is investigated and discussed. The present method provides a rapid and efficient approach to predict added resistance of different types of ships in waves.
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Wang, Jungyong, and Ahmed Derradji-Aouat. "Numerical Prediction for Resistance of Canadian Icebreaker Ccgs Terry Fox In Level Ice." In International conference on Ship & Offshore Technology Ice Class Ships 09. RINA, 2009. http://dx.doi.org/10.3940/rina.icsot.2009.02.

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Luhder, M. "Experiences With The Resistance of SWATH Boats." In CFD 2003: CFD Technology In Ship Hydrodynamics. RINA, 2003. http://dx.doi.org/10.3940/rina.cfd.2003.15.

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Grabowska, K., and P. Szczuko. "Ship resistance prediction with Artificial Neural Networks." In 2015 Signal Processing: Algorithms, Architectures, Arrangements, and Applications (SPA). IEEE, 2015. http://dx.doi.org/10.1109/spa.2015.7365154.

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Reports on the topic "Ship resistance"

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Forgach, Kenneth M. Measurement Uncertainty Analysis of Ship Model Resistance and Self Propulsion Tests. Fort Belvoir, VA: Defense Technical Information Center, October 2002. http://dx.doi.org/10.21236/ada409338.

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Slutsky, Jonathan. Resistance and Component Hull Interactions of a High-Speed Trimaran Sealift Ship. Fort Belvoir, VA: Defense Technical Information Center, November 2008. http://dx.doi.org/10.21236/ada498353.

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Cusanelli, Dominic S., Bryson J. Metcalf, and Ann M. Powers. JHSS Baseline Shaft and Strut (BSS) Model 5653-3 Added Resistance and Powering and Ship Motions, Sea State 6 Random Waves and Regular Waves. Fort Belvoir, VA: Defense Technical Information Center, April 2009. http://dx.doi.org/10.21236/ada498365.

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Lyons, Daniel J., and Christopher J. Chesnakas. Bare Hull Resistance Experiments and LDV Wake Surveys for a Trimaran Concept of a Heavy Air Lift Seabasing Ship (HALSS) Represented by Model 5651. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada473766.

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Malik. L51877 Crack Arrest Toughness to Avoid Dynamic Ductile Fracture in Gas Transmission Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), March 2001. http://dx.doi.org/10.55274/r0010192.

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Design against long ductile fracture propagation in gas pipelines involves an analysis of the balance between driving force, derived from the gas pressure, and the fracture resistance of the material. Initially, the shelf energy in the Charpy test was successfully used as a measure of fracture propagation resistance. As material strength, pipe diameter and operating pressures increased and required greater fracture propagation resistance, the limitations of the Charpy energy approach became increasingly apparent. This limitation for modern steels is due to the fact that the Charpy test involves significant energy absorption contributions from processes not related to fracture propagation. If an energy-balance approach is to be maintained, and if material resistance is to be measured in a fairly simple laboratory notch bend test (e.g. Charpy or drop-weight tear), the problem reduces to the isolation of the propagation energy absorption per unit of crack advance. To resolve crack propagation energy, a novel modification was evaluated for both Charpy and DWTT specimens by employing a back-slot including a snug fitting shim to replace the removed material. In most cases, this modification was effective in curtailing the load-displacement trace when the propagating crack interacted with the slot on the backside of the specimen. It is also noted that this approach did not affect the initial portion of the load-displacement history and thus allowed crack propagation energies to be resolved.
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