Relevant bibliographies by topics / Numerical modelling of superconducting cables

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Numerical modelling of superconducting cables'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Numerical modelling of superconducting cables"

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Bottura, L. "Modelling stability in superconducting cables." Physica C: Superconductivity 310, no. 1-4 (December 1998): 316–26. http://dx.doi.org/10.1016/s0921-4534(98)00482-1.

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Testoni, Pietro, Alessandro Bonito Oliva, Didier Comberscure, Sascha Hell, and Alfredo Portone. "Numerical Simulations of Superconducting Cables Bending and Winding." IEEE Transactions on Applied Superconductivity 20, no. 3 (June 2010): 1928–31. http://dx.doi.org/10.1109/tasc.2010.2040955.

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KOVACHEV, V. "AC LOSSES OF SUPERCONDUCTING ACCELERATOR MAGNETS." Modern Physics Letters B 17, no. 05n06 (March 10, 2003): 175–98. http://dx.doi.org/10.1142/s0217984903005093.

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We are focusing on the uncertainties of analytical and numerical analysis of AC losses in superconducting accelerator magnets working at a relatively high ramp rate. The loss experimental techniques are discussed as well as the source of error in the measurements. The correlation between the interstrand resistance of Rutherford cables and quench current behavior of superconducting magnets is addressed. The control of the critical current of full Rutherford cables by measuring the strands extracted from such cables is illustrated. The importance of cables curing temperature on microhardness and RRR of Cu-matrix of multifilamentary NbTi is pointed out.
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Hartmann, R., P. Rem, and L. Van de Klundert. "Numerical solutions of the current distribution in superconducting cables." IEEE Transactions on Magnetics 23, no. 2 (March 1987): 1584–87. http://dx.doi.org/10.1109/tmag.1987.1065018.

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Rochinha, F. A., and H. S. Costa Mattos. "Numerical modelling of the extension-torsion coupling in cables." Mechanics Research Communications 23, no. 5 (September 1996): 511–17. http://dx.doi.org/10.1016/0093-6413(96)00051-1.

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Hartmann, R. A., D. Dijkstra, F. P. H. van Beckum, and L. J. M. van de Klundert. "Numerical solution of the transverse resistivity of superconducting cables under AC conditions." IEEE Transactions on Magnetics 25, no. 2 (March 1989): 2131–34. http://dx.doi.org/10.1109/20.92730.

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Sheng, Jie, Michal Vojenciak, Rifki Terzioglu, Lubomir Frolek, and Fedor Gomory. "Numerical Study on Magnetization Characteristics of Superconducting Conductor on Round Core Cables." IEEE Transactions on Applied Superconductivity 27, no. 4 (June 2017): 1–5. http://dx.doi.org/10.1109/tasc.2016.2632901.

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Čiegis, Raimondas, Remigijus Čiegis, Mečislavas Meilūnas, Gerda Jankevičiutė, and Vadimas Starikovičius. "PARALLEL NUMERICAL ALGORITHMS FOR OPTIMIZATION OF ELECTRICAL CABLES." Mathematical Modelling and Analysis 13, no. 4 (December 31, 2008): 471–82. http://dx.doi.org/10.3846/1392-6292.2008.13.471-482.

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In this paper we propose new heuristic numerical algorithm for determination of the optimal wires diameters in electrical cables. Two multilevel parallel versions of the optimization algorithm are constructed. The first algorithm is based on master‐slave technique and the second algorithm uses the data‐parallel strategy. Multilevel structure of the algorithms gives a possibility to adapt them to parallel architecture, for example, cluster of multicore computers. Some results of numerical experiments are presented which agree well with theoretical analysis.
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TEBANO, RICCARDO, RENATA MELE, VINCENZO BOFFA, FEDOR GÖMÖRY, FRANTISEK STRYCEK, and EUGEN SEILER. "NUMERICAL INVESTIGATION ON AC PROPERTIES IN HIGH TC SUPERCONDUCTING TAPES." International Journal of Modern Physics B 17, no. 04n06 (March 10, 2003): 528–33. http://dx.doi.org/10.1142/s0217979203016182.

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Reduction of AC losses for large-scale applications of superconductors is a critical issue. Therefore, the quantitative evaluation of AC losses is important for the development of superconductors and their applications to electrical power systems. The development of numerical models that simulate the electromagnetic phenomena inside superconductors allows to understand the electromagnetic behavior of superconductors and to evaluate the AC loss properties. Following an approach proposed by Brandt in several papers, a numerical model was developed in order to study the AC properties of superconducting tapes in different geometrical arrangements and with time dependent current and magnetic field. Here we show an example for simple single-layer model cables to show how this rather simple and versatile numerical approach allows optimizing configurations for actual operational conditions.
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Qin, Jinggang, Donghua Yue, Xingyi Zhang, Yu Wu, Xiaochuan Liu, Huajun Liu, Huan Jin, et al. "Rotation analysis on large complex superconducting cables based on numerical modeling and experiments." Superconductor Science and Technology 31, no. 2 (December 19, 2017): 025001. http://dx.doi.org/10.1088/1361-6668/aa9c7b.

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Dissertations / Theses on the topic "Numerical modelling of superconducting cables"

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Grilli, Francesco. "Numerical modelling of high temperature superconducting tapes and cables /." [S.l.] : [s.n.], 2004. http://library.epfl.ch/theses/?display=detail&nr=2909.

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Talami, Matteo. "Modeling of the Toroidal Field Insert coil for the ITER Project." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12916/.

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Il contenuto della tesi riguarda le analisi numeriche e sperimentali effettuate su un campione di cavo superconduttivo del sistema magnetico del reattore sperimentale per la fusione nucleare “ITER”. In particolare, il campione di cavo denominato “Toroidal Field Insert” o “TFI”, appartiene al sistema magnetico toroidale della macchina e viene inserito in un solenoide esterno in modo da replicare le condizioni di campo magnetico tipiche del normale funzionamento di questo conduttore. Le analisi sperimentali effettuate sul campione sono mirate alla caratterizzazione del comportamento durante un ipotetico ciclo di vita del cavo. I parametri principalmente studiati risultano essere: la caratterizzazione dello stato superconduttivo prima e dopo le varie sollecitazioni imposte, l’efficacia idraulica del raffreddamento e la stabilità termica del magnete. In modo complementare alla analisi dei dati sperimentali, due modelli numerici a diverse scale sono stati sviluppati e testati: un primo modello, alla scala di sistema, si occupa dello studio termico e idraulico dell’intera porzione di cavo testata; il secondo, alla scala di componente, si occupa della simulazione elettromagnetica di un riscaldatore induttivo installato sul conduttore volto a misurarne la stabilità. Il confronto tra l’analisi numerica e quella sperimentale ha permesso la comprensione dei principali fenomeni in gioco e la caratterizzazione del conduttore testato.
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Bouzó, Marta Costa. "Numerical modelling of superconducting composites in AC magnetic fields." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416916.

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Girardin, Bertrand. "Numerical modelling and small scale testing of fire performances for halogen-free cables." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10030/document.

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L'objectif de ce travail de thèse est d’étudier le comportement au feu de câbles électriques par deux approches, la première consistant à développer des méthodes de caractérisation des propriétés des gaines externes de câbles afin d’en modéliser le comportement au feu. Parallèlement, une approche basée sur le développement d’un banc d'essai original à échelle réduite a été étudiée. La caractérisation des propriétés thermo-physique des matériaux a permis la prédiction de la température et de la perte de masse lors d'expériences thermogravimétriques, de gazéification et de combustion. Il a été montré que tester de mince spécimen de gaine de câbles dans une enceinte à échelle réduite permettait la prédiction des résultats de la norme EN 50399. Ce nouveau test de l'échelle du laboratoire a ensuite utilisé avec succès pour le développement de nouveaux câbles présentant des propriétés feu améliorées
The aim of this PhD work is to study the behavior of cables following two approaches: numerical modelling and small scale testing. First, methodologies to characterize the properties of the cables jacket materials were developed to further model their fire behavior. Concurrently, an approach was followed by developing a novel bench-scale fire test. Innovative methodologies using simultaneous thermal analyzer, Hot Disc apparatus were developed and so, the thermo-physical properties of the materials were characterized both as a function of temperature and of the decomposition state. Using these parameters as inputs data for a pyrolysis model, the temperature and mass loss rate were well predicted in case of thermo-gravimetric experiments, gasification and mass loss calorimeter. Moreover, it was shown that testing thin specimen of cables jacket materials in a reduced scaled enclosure of the EN 50399 test allowed the prediction of the results obtained on the large scale test carried out on whole cables. This new bench scale test was then successfully to develop new material that can be used as jacket for halogen-free electrical cable
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Barnes, Gary James. "Computational modelling for type-II superconductivity and the investigation of high temperature superconducting electrical machines." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365887.

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Rozier, Blandine. "Contribution to electromagnetic and thermal modelling of High Temperature Superconducting REBCO coils for protection purpose." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT101.

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Les supraconducteurs sont des matériaux qui présentent l’étonnante particularité de transporter du courant sans pertes à très basse température et sous certaines conditions de fonctionnement. Cependant, lorsque ces conditions ne sont plus remplies, l’état supraconducteur et non dissipatif disparaît, laissant place à un comportement fortement dissipatif (pertes Joule). Cette transition soudaine et rapide s’accompagne d’une génération importante de chaleur pouvant mener à la destruction de l’appareil. Cette thèse s’intéresse plus particulièrement aux électro-aimants réalisés à partir de ruban Terre Rare Baryum Cuivre Oxyde (TRBCO) isolé, un matériau supraconducteur dit à haute température critique. La protection de bobines TRBCO contre des dérives thermiques destructrices requiert une connaissance approfondie du phénomène de transition ainsi qu’une interprétation poussée du signal utilisé pour la détection, ici la tension. L’objectif est alors d’analyser la réponse de bobines TRBCO à une alimentation par une source de courant DC. Pour ce faire, deux principaux modèles ont été développés. Le premier se focalise sur les comportements électromagnétiques transitoires observés lors de variations de courant. En effet, l’apparition de courants d’écrantage propres aux supraconducteurs rend le signal de détection difficile à interpréter (phénomènes hystérétiques, de relaxation …). Pour traiter ce problème, une formulation innovante issue des méthodes intégrales de volume a été développée, testée, validée puis appliquée à la problématique de protection. Le second modèle s’intéresse quant à lui aux conditions d’apparition ainsi qu’à la propagation d’une zone dissipative dans le bobinage dans le but de définir des seuils de tension de détection sûrs mais également réalisable en pratique compte tenu de la précision des appareils de mesure. Les résultats combinés de ces deux modèles devraient permettre une détection précoce et donc une protection efficace de bobines TRBCO utilisées pour la génération de champ magnétique intense
Superconducting materials are able to carry very high current densities without any losses once cooled down to very low temperature and under specific operating conditions. However, the non-dissipative superconducting state is lost as soon as these conditions are not complied with anymore, and it is replaced by a highly dissipative behaviour. This sudden and fast transition comes along with an important heat generation that can lead to the destruction of the device. This PhD work focuses on electromagnets made with insulated Rare Earth Barium Copper Oxide (REBCO) which is a high temperature superconductor. Protection of REBCO coils from destructive thermal runaways requires a thorough knowledge of the transition phenomenon, as well as a good interpretation of the signal used for detection, here the voltage. The objective is thus to analyse the behaviour of REBCO coils once supplied by a DC current source. To do so, two different models have been developed. The first one focuses on the transient electromagnetic behaviours observed during current variations. Indeed, the shielding currents phenomenon proper to superconducting materials makes the detection signal hard to interpret (hysteresis, relaxation …). In order to deal with this problem, an innovative formulation resulting from the volume integral method has been developed, tested, validated and finally applied to the protection problem. The second model examines the occurrence and propagation of a dissipative zone inside the winding in order to be able to define safe voltage threshold values that also account for the level of accuracy of the measurement apparatus. Combining results from both models should enable an early detection and hence an efficient protection of REBCO coils used for high field generation
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Amaro, Nuno Manuel Ortega. "Study of AC losses in medium-sized high temperature superconducting coils." Doctoral thesis, 2015. http://hdl.handle.net/10362/16554.

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The study of AC losses in superconducting pancake coils is of utmost importance for the development of superconducting devices. Due to different technical difficulties this study is usually performed considering one of two approaches: considering superconducting coils of few turns and studying AC losses in a large frequency range vs. superconducting coils with a large number of turns but measuring AC losses only in low frequencies. In this work, a study of AC losses in 128 turn superconducting coils is performed, considering frequencies ranging from 50 Hz till 1152 Hz and currents ranging from zero till the critical current of the coils. Moreover, the study of AC losses considering two different simultaneous harmonic components is also performed and results are compared to the behaviour presented by the coils when operating in a single frequency regime. Different electrical methods are used to verify the total amount of AC losses in the coil and a simple calorimetric method is presented, in order to measure AC losses in a multi-harmonic context. Different analytical and numerical methods are implemented and/or used, to design the superconducting coils and to compute the total amount of AC losses in the superconducting system and a comparison is performed to verify the advantages and drawbacks of each method.
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Kapuge, Kariyawasam Mudalige Anuradha Kariyawasam. "Improving the numerical acccuracy of models of sector-shaped and cross-bonded cable systems." 2016. http://hdl.handle.net/1993/31915.

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This thesis introduces a comprehensive methodology to improve electromagnetic transient (EMT) modelling of power cables systems. Several improved modelling and validation techniques are proposed at the parameter estimation, time domain simulation and validation stages of the EMT modelling of transmission lines. A novel approach is developed to model sector-shaped cables in electromagnetic transient type programs. First, the applicability of elemental sub-conductor technique is extended to accurately calculate the frequency dependent impedances of sector-shaped cables. The derived admittance and propagation characteristics of the sector-shaped cable are fitted with rational functions using the method of vector fitting in an EMT-type program. The time domain simulations are validated with the numerical inverse Laplace transform method. A novel frequency domain approach is presented to model cascaded transmission systems. The procedure is based on obtaining four composite propagation functions representing the cascaded system. The performance of the technique does not diminish with increased number of cascaded segments and it preserves the intrinsic details of each line segment. This method is capable of modelling cascaded overhead lines or cables with different characteristic admittances and line lengths. This method can be used to validate EMT models of cascaded transmission systems. An improved generalized transmission line model is introduced which is capable of accommodating time steps greater than the travel time of the line. The time step of the conventional EMT models of transmission lines is constrained by the smallest travel time of the line. When the high frequency transients at the line terminations are not of interest, inaccurate nominal π equivalents are used with large time steps to reduce the computational burden. The proposed model not only is more accurate than the π equivalents, but also degenerates to the conventional frequency dependent EMT model when used with time steps smaller than the travel time. Therefore, the proposed model is highly convenient as it can be used for all types of EMT simulations without resorting to nominal π equivalents when the large simulation time steps must be used to reduce computational burden.
February 2017
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Book chapters on the topic "Numerical modelling of superconducting cables"

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ter Avest, D., and L. J. M. van de Klundert. "Numerical Analysis of the Voltage Current Transition in Superconducting Cables." In 11th International Conference on Magnet Technology (MT-11), 259–63. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0769-0_44.

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Fukunaga, T., and A. Oota. "Numerical Analysis on AC Transport Losses of High Temperature Superconducting Wires and Cables." In Advances in Cryogenic Engineering Materials, 707–14. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9056-6_93.

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Ainslie, Mark, and Hiroyuki Fujishiro. "Numerical modelling of bulk superconducting materials." In Numerical Modelling of Bulk Superconductor Magnetisation. IOP Publishing Ltd 202, 2019. http://dx.doi.org/10.1088/978-0-7503-1332-2ch2.

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Ainslie, Mark, and Hiroyuki Fujishiro. "Fundamentals of bulk superconducting materials." In Numerical Modelling of Bulk Superconductor Magnetisation. IOP Publishing Ltd 202, 2019. http://dx.doi.org/10.1088/978-0-7503-1332-2ch1.

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Hartmann, R. A., F. M. Welling, F. P. H. van Beckum, and L. J. M. van de Klundert. "NUMERICAL SOLUTIONS OF THE CURRENT DISTRIBUTION IN SUPERCONDUCTING RECTANGULAR CABLES." In Proceedings of the Twelfth International Cryogenic Engineering Conference Southampton, UK, 12–15 July 1988, 893–97. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-408-01259-1.50172-8.

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Jordão, S., M. Pinho, J. Martins, A. Santiago, and P. Cruz. "Numerical modelling of a laminated glass beam reinforced with pre-stressed cables." In Challenging Glass 4 & COST Action TU0905 Final Conference, 253–60. CRC Press, 2014. http://dx.doi.org/10.1201/b16499-38.

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Conference papers on the topic "Numerical modelling of superconducting cables"

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French, S. A., and C. R. A. Catlow. "Molecular modelling of organic superconducting salts." In Neutrons and numerical methods. AIP, 1999. http://dx.doi.org/10.1063/1.59479.

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de Menezes, Eduardo A. W., Sandro C. Amico, and Rogério J. Marczak. "Numerical Modelling of Helical Cables Using Beam Elements." In Brazilian Conference on Composite Materials. Pontifícia Universidade Católica do Rio de Janeiro, 2018. http://dx.doi.org/10.21452/bccm4.2018.16.04.

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Menezes, Eduardo, Sandro Amico, and Rogério Marczak. "NUMERICAL MODELLING OF HELICAL CABLES USING BEAM-BASED METAELEMENTS." In 25th International Congress of Mechanical Engineering. ABCM, 2019. http://dx.doi.org/10.26678/abcm.cobem2019.cob2019-0436.

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Villarreal-Garcia, Gerardo E., Nicola A. Tyler, Jorge Barreto, Damien Bonneau, Dondu Sahin, Jeremy L. O'Brien, and Mark G. Thompson. "Modelling superconducting nanowire single photon detectors in a waveguide-based ring resonator." In 2016 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD). IEEE, 2016. http://dx.doi.org/10.1109/nusod.2016.7547011.

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Kubiczek, Krzysztof, Mariusz Stepien, and Marian Kampik. "The numerical approximation of high-temperature superconducting cables as a step toward future lossless power grid." In 2018 First International Colloquium on Smart Grid Metrology (SmaGriMet). IEEE, 2018. http://dx.doi.org/10.23919/smagrimet.2018.8369822.

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Santos, Joa˜o Alfredo. "Numerical Modelling of Automatic Mooring Winches Applied to Moored Ships in Harbours." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57661.

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In order to control excessive motions of moored ships, automatic mooring winches, namely constant tension winches and automatic tension winches, have been employed. It has been common practice the recovering force in automatic tension winches never becoming lower than one third of the rendering force. However, the existence of such a non-zero recovering force implies that the cable where that force is applied to may be counteracting the rendering force produced on an opposing cable by another winch. Ideally, winches should only produce forces to reduce ship motions, hence the recovering force should be zero. This paper describes the use of a numerical model for moored ship behaviour in the study of the effects of automatic tension winches in the motion amplitudes of a 108 416 m3 displacement ship moored in two different conditions: a) alone at an exposed location; b) 30 m apart from a vertical breakwater. Additional cables connected to automatic mooring winches are considered and the change from idealized conditions where the cables apply forces on the ship with no vertical component to realistic conditions where such component exists is investigated as well as the influence of the recovering force on the ship motions for the ship subject to regular head waves.
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Martindale, Hugh, Steven Rossiter, Terence Sheldrake, and Richard Langdon. "Improved Dynamic Structural Modelling for Subsea Power Cables With Bitumen Coated Armour Wires." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61848.

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This paper presents improved dynamic modelling of subsea power cables using new models for the determination of non-linear cable mechanical properties. The modelling has been developed for cables typically used in offshore wind and for interconnectors, as well as dynamic power umbilicals. The results provide a better simulation of the dynamic response and allow better integration of local and global modelling for determination of stress and fatigue in offshore power cables. Cable response due to bending is modelled by including non-linear adhesion induced stresses due to a yielding bond between armour wire and neighbouring layers, which captures the effects of temperature and strain rate and provides better representation than purely friction-based modelling especially at low tension. Local armour bending stiffness is included by using average wire strain energy after slip along the strained helical path to determine the armour layer bending stiffness contribution. Mathematical modelling for mechanical properties is verified by sample testing and FEA, to provide a robust method for predicting cable response. Although dynamic subsea power cables are essentially non-bonded structures there is a certain amount of adhesion within the structure. Previous work has focused on friction-tension based modelling of armour wire-core interaction, that is not appropriate as critical slip curvatures at low tension are understated and full-slip stress distributions do not account for work done against friction during further bending. The principal result of this new approach is the improved determination of lifetime stresses for critical components within the cable structure. Non-linear bend stiffness modelling produces characteristic moment-curvature relations including hysteresis on reversal of bending. These curves provide an improved representation of the onset of slip in the armour wires and allow for the influence of temperature and strain rate on the cable bending stiffness to be included. The bend-stiffness model has been validated against test data both of complete bundles and individual components. The overall result is a methodology that typically results in increased fatigue life and can reduce the requirement for ancillary products such as ballast/buoyancy and bend stiffeners/restrictors. Additionally, the non-linear, hysteretic response of a cable significantly reduces certain phenomena that are often associated with numerical modelling of cables using a linear bend stiffness. Specifically, a cable catenary attached to a vessel and modelled with a linear bend stiffness will often experience ‘compression waves’ when the vessel is moving in response to wave loading. Use of a non-linear, hysteretic bend stiffness minimises the compression wave phenomenon, giving a much more realistic response and often greatly improving operability windows for offshore operations.
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Martin, Blake, and Armaghan Salehian. "Vibration Modelling of String-Harnessed Beam Structures Using Homogenization Techniques." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37039.

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Harnessing structural elements with strings, power cables, and signal cables increases the complexity in modelling the dynamic behaviour of such structures. Developing models capable of accurately predicting the dynamic behaviour of these systems is of great importance for space structures that cannot be tested prior to launch. The focus of this work is obtaining an equivalent continuum model for string-harnessed beam-like structures with periodic wrapping patterns. The tension in the string is assumed to vary as the beam deflects. The displacement field with second-order terms is determined and from which the Green-Lagrange strain tensor is obtained. After finding kinetic and potential energy expressions Hamilton’s principle is used to obtain the partial differential equation and boundary conditions. Numerical results for the shift in the natural frequencies are presented for various string properties to investigate their effects on the structure.
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Connaire, Adrian, Krassimir Doynov, Ruairi Nestor, and Venkat Krishnan. "Validated Methodology for Calculating Fatigue Capacity of Deepwater Umbilicals." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77099.

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Steel tube umbilical designs are becoming more complex and are being deployed in increasingly severe environments. Umbilical designs can now accommodate up to 3-inch diameter steel tubes for chemical and hydraulic injection, up to four layers of armoring, multiple electrical cables and fiber optic lines. Large power transmission cables are also being incorporated in umbilical constructions. This is leading to ever increasing umbilical mass, radial loads, pressure loads and increased demands on the designer to demonstrate adequate fatigue capacity. A method has been developed for predicting the fatigue response of deepwater umbilicals, particularly for umbilicals subject to high tension and bending loads. The method involves predicting cyclic stress in the umbilical components (steel tubes or power cables) using an industry standard, general purpose numerical tool. It comprehensively accounts for the complex relationships between umbilical curvature, tension, inter-layer contact forces and tube stress variation. This paper describes the validation of the method against measured data obtained from full scale fatigue tests performed on two deepwater umbilicals. A key feature of the method relates to the construction and verification of suitable finite element (FE) models and the simulation of fatigue conditions. For the validation of the models, results from the full scale dynamic umbilical test cases incorporating bend stiffeners and loading arms are used, which demonstrate umbilical hysteretic behavior under cyclic bending loads. Hysteretic stress-curvature loops obtained from strain gauge readings for various tube locations within the bend stiffener regions for two umbilical constructions with significantly different lay-up configurations and fatigue stress regimes are used for comparison to strain predictions from the FE models. A significant advantage of the modelling and analysis methods described in this paper is that it employs the widely-used industry standard numerical FE tool, Abaqus, for the modelling and analysis of the umbilical. Key features and insights from the modelling, analysis approach and validation against the results of a deepwater umbilical dynamic test program are described. A robust and efficient method for the independent assessment of the fatigue capacity of deepwater umbilicals is demonstrated.
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