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Dissertations / Theses on the topic 'Centrifuge modeling'

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Published: 4 June 2021

Last updated: 27 July 2025

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1

Bernardi, Lorenzo. "Centrifuge Modeling of Sandy Slopes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amslaurea.unibo.it/125/.

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Slope failure occurs in many areas throughout the world and it becomes an important problem when it interferes with human activity, in which disasters provoke loss of life and property damage. In this research we investigate the slope failure through the centrifuge modeling, where a reduced-scale model, N times smaller than the full-scale (prototype), is used whereas the acceleration is increased by N times (compared with the gravity acceleration) to preserve the stress and the strain behavior. The aims of this research “Centrifuge modeling of sandy slopes” are in extreme synthesis: 1) test

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2

Sakr, Mohammed A. "Centrifuge modeling of tapered piles in sand." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ58078.pdf.

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3

Iacorossi, Matteo. "Centrifuge modeling of earth-reinforced retaining walls." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3369/.

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Object of this thesis has been centrifuge modelling of earth reinforced retaining walls with modular blocks facing in order to investigate on the influence of design parameters, such as length and vertical spacing of reinforcement, on the behaviour of the structure. In order to demonstrate, 11 models were tested, each one with different length of reinforcement or spacing. Each model was constructed and then placed in the centrifuge in order to artificially raise gravitational acceleration up to 35 g, reproducing the soil behaviour of a 5 metre high wall. Vertical and horizontal displacements

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4

Banno, Katsunori. "Centrifuge modeling of immiscible fingering in porous media." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/41000.

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5

Chu, Lok Man. "Centrifuge modeling of vessel impacts on bridge pile foundations /." View abstract or full-text, 2010. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202010%20CHU.

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6

Nakajima, Hideo. "Centrifuge modeling of LNAPL movement in the vadose zone /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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7

Bilien, Valérie. "Modeling human spatial orientation perception in a centrifuge using estimation theory." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12645.

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8

Sherrell, Ian Michael. "Parameter Evaluation and Modeling of a Fine Coal Dewatering Screen-Bowl Centrifuge." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32562.

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A vast majority of coal and mineral cleaning and upgrading processes involve the addition of water. The water allows the movement of particles throughout the processing plant and the upgrading of the material. When the process is complete the finished product must be dewatered. This is due to storage concerns, in which the water takes up a majority of the space, and high transportation costs, in which no compensation is obtained from the buyer for the shipment of the liquid. Dewatering is accomplished by many devices, with the two most common pieces of equipment being the screen-bowl centrifug

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9

Qin, Jin. "CENTRIFUGE MODELING THE INFLUENCE OF FABRIC ANISOTROPY ON SEISMIC RESPONSE OF FOUNDATIONS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1449001494.

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10

Cisternas, Fernández Martín Matías. "Modeling of solidification of TiAl alloys in centrifugal casting." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0218.

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Les alliages TiAl sont un groupe de matériaux important pour les industries automobile et aérospatiale, de par leur faible densité et bonne tenue mécanique à haute température. Cependant, à cause de leur forte réactivité à l’état liquide, au moment de couler ces alliages, il faut utiliser une faible surchauffe pour limiter la contamination. La coulée centrifuge est une option pour améliorer le remplissage du moule à faible surchauffe. En coulée centrifuge, l’effet de la poussée d’Archimède sur le mouvement du liquide est renforcé, ce qui modifie l’écoulement par l’effet combiné de la force cen

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11

El, Haffar Ismat. "Physical modeling and study of the behavior of deep foundations of offshore wind turbines in sand." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0021/document.

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La capacité axiale et latérale des pieux foncés dans du sable de Fontainebleau NE34 ont été étudié à l’aide d’essais sur modèles réduits centrifugés. L’effet de la méthode d’installation, de la densité et de la saturation du sable, du diamètre du pieu, de la géométrie de sa pointe (ouvert /fermé) et de sa rugosité sur la capacité axiale a été étudié. Une augmentation significative de la capacité en traction est observée dans les pieux foncés cycliquement, contrairement aux pieux foncés d’une manière monotone à 100 × g. La saturation du sable dense accélère la formation du bouchon lors de l'ins

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12

Ratnam, Sangkaran. "Geotechnical centrifuge modeling of the behavior of light nonaqueous phase liquids (LNAPLs) in sand samples under hydraulic flushing." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10849.

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13

Reeb, Alexander Brenton. "Response of Pile-Supported T-Walls to Fill Loading and Flood Loading Based on Physical Model Studies and Numerical Analyses." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/64498.

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Pile-supported T-walls, which are concrete floodwalls that are shaped like an inverted "T" and supported by batter piles, are commonly used by the United States Army Corps of Engineers (USACE) to protect low-lying portions of New Orleans and other areas. The design of a T-wall in southern Louisiana is complex, as the structure needs to resist both 1) large settlements caused by fill placed beneath and beside the T-wall before T-wall construction or by fill placed beside the T-wall after T-wall construction, and 2) large lateral flood loads that are imposed during a hurricane. As a result of th

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14

Takai, Atsushi. "Geoenvironmental Reliability of Soil-Bentonite Mixture Cutoff Walls." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188847.

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15

Khosravi, Mohammad. "Seismic Response of Structures on Shallow Foundations over Soft Clay Reinforced by Soil-Cement Grids." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/72978.

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This study uses dynamic centrifuge tests and three-dimensional (3D), nonlinear finite-difference analyses to: (1) evaluate the effect of soil-cement grid reinforcement on the seismic response of a deep soft soil profile, and (2) to examine the dynamic response of structures supported by shallow foundations on soft clay reinforced by soil-cement grids. The soil profile consisted of a 23-m-thick layer of lightly over-consolidated clay, underlain and overlain by thin layers of dense sand. Centrifuge models had two separate zones for a total of four different configurations: a zone without reinfor

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16

Aslam, Raveed. "Centrifuge modelling of piled embankments." Thesis, University of Nottingham, 2008. http://eprints.nottingham.ac.uk/12399/.

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It is becoming increasingly necessary to construct on land that was previously considered inappropriate for construction, such as soft clay. The properties of soft clay make it highly compressible and low in shear strength, meaning that bearing capacity failure and excessive settlement are of concern. Piled embankments are a ground improvement technique that can provide a solution for this problem. Piled embankments have the ability to transfer the greater part of the embankment load and any surcharge to more competent material at greater depth due to the 'arching' concept. Consequently, the s

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17

Smith, James Seymour. "Scaled geotechnical centrifuge modelling of gelifluction." Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/54676/.

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This thesis describes the laboratory modelling of gelifluction processes using the geotechnical centrifuge technique. Thirteen 1/10 scale planar slope models were frozen from the surface downwards on the laboratory floor and thawed, also from the surface downwards, under gravitational acceleration of 10 gravities (approximately 98.1 ms'2). A natural sandy silt soil from Quaternary periglacial slope deposits collected in SW England formed the base test material and slope models at gradients 4, 8, 12 and 16 were constructed using this soil. 10% and 20% by weight increments of glaciolacustrine si

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18

Gammage, Paul J. "Centrifuge modelling of soil nailed walls." Thesis, Cardiff University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262723.

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19

Rivera, Rojas Alfonso Jose. "Lateral response of stiff column-supported shallow foundations." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/100795.

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The mechanisms that control the lateral response of stiff column-supported shallow foundations, resulting from the application of horizontal load on shallow foundations supported by stiff columns, are uncertain. Stiff columns constructed in soft clayey soil have been used to support retaining walls and in such cases, the lateral thrust applied behind these geotechnical structures is a source of horizontal loading. For seismic events, stiff columns constructed in soft clayey soil have been used to support shallow foundations subjected to horizontal load coming from the upper structure of buildi

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20

Gue, Chang Shin. "Submarine landslide flows simulation through centrifuge modelling." Thesis, University of Cambridge, 2012. https://www.repository.cam.ac.uk/handle/1810/243401.

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Landslides occur both onshore and offshore. However, little attention has been given to offshore landslides (submarine landslides). Submarine landslides have significant impacts and consequences on offshore and coastal facilities. The unique characteristics of submarine landslides include large mass movements and long travel distances at very gentle slopes. This thesis is concerned with developing centrifuge scaling laws for submarine landslide flows through the study of modelling submarine landslide flows in a mini-drum centrifuge. A series of tests are conducted at different gravity fields i

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21

Hynes, Frank Glenn. "Centrifuge modelling of ice scour in sand." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25852.pdf.

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22

Lemoine, Elise Marie Jeanette Simone. "Modelling sand production in a geotechnical centrifuge." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ48275.pdf.

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23

Cinicioglu, Ozer. "In-situ shear strength by centrifuge modelling." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/dissertations/fullcit/3165819.

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24

Taunton, Paul R. "Centrifuge modelling of soil/masonry structure interaction." Thesis, Cardiff University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244112.

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25

Parvizi, Mansour. "Centrifuge modelling of low energy dynamic compaction." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495952.

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Low Energy Dynamic Compaction (LEDC) is a recently adopted approach for the rapid improvement of the mechanical behaviour of soil to a relatively shallow depth over a limited area. This method of compaction is termed `low energy' because the energy input per blow is low compared with that imparted by traditional dynamic compaction techniques. The field apparatus for this method was designed originally by BSP/DRA for the rapid repair of bomb damaged airfield runways, but later adopted as a method of ground improvement. This thesis describes the design and operation of a unique model compactor s

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26

Liu, Weiwei. "Axisymmetric centrifuge modelling of deep penetration in sand." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11550/.

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The advancement of a slender object into soil (to depths of 10s of metres) is of fundamental interest to Geotechnical Engineers. Considerable advances have recently been made in beginning to understand some detailed aspects of the fundamental behaviour for penetration in sand using physical models. In this project, a 180° axisymmetric model is developed, which allows viewing of soil movement as a circular penetrometer advances into the soil. The model was tested in a geotechnical centrifuge with digital photographic techniques used to track soil movement. A series of 10 centrifuge tests is rep

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27

Louw, Hendrik. "Modelling horizontally loaded piles in the geotechnical centrifuge." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/73182.

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Pile foundations are extensively used to support various structures that are constructed in soft/loose soils, where shallow foundations would be considered ineffective due to low bearing capacities and large settlements. The design of these structures to accommodate lateral applied loads in particular, usually imposed by winds, water and earth pressures, has gained popularity over the past few decades. The behaviour of horizontally loaded piled foundations is a complex soil-structure interaction problem and is usually concerned with the relative stiffness between the pile and the surrounding s

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28

Leufvén, Oskar. "Modeling for control of centrifugal compressors." Doctoral thesis, Linköpings universitet, Fordonssystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-91384.

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Downsizing and turbocharging of engines provide a way to meet increasing demands for efficiency and performance in the automotive industry. An engine design is a result of compromises, e.g. the selection of charging system, and the trend is to reduce these compromises by increasing system complexity. Models have come to play a central role to handle this rise in complexity, and are used for simulation, system optimization and control synthesis. The models should describe the entire operating range, be capable of extrapolation, be easily parameterizable, and wide cover a range of applications.

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29

Lee, Say Yong. "Centrifuge modelling of cone penetration testing in cohesionless soils." Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/250983.

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30

Teymur, Berrak. "The significance of boundary conditions in dynamic centrifuge modelling." Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/251828.

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31

Dunham, Lee. "Centrifuge modelling of a rigid footing on jointed rock." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0025/MQ38369.pdf.

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32

Yoon, Boung Shik. "Centrifuge modelling of discrete pile rows to stabilise slopes." Thesis, University of Nottingham, 2008. http://eprints.nottingham.ac.uk/28510/.

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Discrete pile rows are widely used for improving the stability of potentially unstable slopes, where columns of reinforced concrete are constructed in the ground to reinforce it and inhibit instability. The method becomes more cost effective with wider pile spacings, but simultaneously there is also increasing risk that the soil will flow through the gap between adjacent piles, rather than arching across it. The impact of pile spacing along the row, which is likely to have a significant effect on stability, is not clearly understood from a current design perspective. In this study the effects

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33

Mokrani, A. "Centrifuge and finite element modelling of buried flexible culverts." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233377.

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34

Richards, David John. "Centrifuge and numerical modelling of twin-propped retaining walls." Thesis, Queen Mary, University of London, 1995. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1704.

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A series of tests on flexible model diaphragm walls embedded in an overconsolidated clay was carried out at the London Geotechnical Centrifuge Centre. The walls were propped at the crest and, following the simulation of excavation, were propped at formation level. Although a retained height of 10m was modelled in all tests, the depth of embedment below dredge level varied between Sm, 10m and 15m. A 'softer' propping sequence was also investigated with excavation to 5m below the retained surface prior to the installation of the crest level prop then, following further excavation to dredge level

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35

Tan, Finian Seng Chin. "Centrifuge and theoretical modelling of conical footings on sand." Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/283667.

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36

Chan, Chung Yie. "Centrifuge modelling of behaviour of piles in consolidating ground /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202004%20CHAN.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 180-185). Also available in electronic version. Access restricted to campus users.

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37

Yin, Jun. "Numerical modelling of centrifugal casting process." Thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-195650.

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The centrifugal casting process is a common method for manufacturing the tubes, etc. Due to its high temperature and invisible mold, it is really difficult to know the mechanism of molten steel inside the mold. It is important to know the mechanism of the molten steel inside mold, since it will help the manufacturer to know more accuracy of the flow of the molten steel so that it can work for improving the productivity and quality of the products. Casting funnel design is the designed by Åkers for their funnel which will result in different flow behavior. In thesis work, casting funnel design

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38

Esposito, Gennaro. "Centrifuge modelling of LNAPL transport in partially saturated granular medium." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0002/MQ44007.pdf.

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39

Esposito, Gennaro 1967. ""Centrifuge modelling of LNAPL transport in partially saturated granular medium." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20499.

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This thesis presents the experimental modelling of Light Non-Aqueous Phase Liquids transport in partially saturated with water sand using centrifuge tests, which were carried out at the Geotechnical Centrifuge facility located at Delft Technical University (The Netherlands). The experimentation consisted of a two-dimensional three-phase flow (air, water, Light Non-Aqueous Phase Liquids) in an unsaturated sand for two values of porosity. The Light Non-Aqueous Phase Liquids used in this research was a multigrade motor oil. The modelling of a two-dimensional flow and the use of a transparent stro

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40

Barker, Hugh Richard. "Physical modelling of construction processes in the mini-drum centrifuge." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445548.

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41

Gui, Meen-Wah. "Centrifuge and numerical modelling of pile and penetrometer in sand." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361612.

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42

Colwill, R. D. "Marine drag anchor behaviour-a centrifuge modelling and theoretical investigation." Thesis, University of Manchester, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508339.

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43

Jones, Alun M. C. "Centrifuge modelling of soil nailing : an investigation of lifetime performance." Thesis, Cardiff University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248162.

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44

Lee, F. H. "Centrifuge modelling of earthquake effects on sand embankments and islands." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372657.

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45

Hao, Jinde. "Dynamic responses of soil anchorages using numerical and centrifuge modelling techniques." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24846.

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46

Benson, Kristen D. "Use of centrifuge modelling to validate an unsaturated transport numerical simulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65665.pdf.

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47

da, Silva Talia Simone. "Centrifuge modelling of the behaviour of geosynthetic-reinforced soils above voids." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274675.

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Understanding the deformation mechanisms of soils and geosynthetics in response to the formation of a void below a geosynthetic-reinforced soil is crucial to provide efficient designs of geosynthetic-reinforced soil systems such as embankments and landfill liners. Centrifuge modelling of the soil and geosynthetic behaviour was conducted using a trapdoor to simulate the formation of a void in a controlled environment at realistic stress levels. A plane-strain model allowed visual observations of the deformation mechanisms using Particle Image Velocimetry. Granular soils and model clay liners we

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48

Cox, Craig Mark. "Centrifuge modelling of the ground reaction curve in fibre-reinforced soil." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/28020/.

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The phenomenon known as the ‘arching effect’ occurs when a portion of granular mass yields relative to an adjacent stationary region. The movement is resisted by shearing stresses which act to reduce the pressure on the yielding support and increase the pressure on the adjacent stationary supporting zones. Arching is widely observed in both natural and man-made structures such as piled embankments, tunnelling, and above mine works and sinkholes. In this research the arching effect is recreated in the increased gravity environment of a geotechnical centrifuge where the pressure distribution acr

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49

Van, Tonder Warren Deon. "Centrifuge modelling of permeability in a heterogeneous coal mine backfill sequence." Diss., University of Pretoria, 2015. http://hdl.handle.net/2263/57291.

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Opencast mining has been and continues to be a favoured method for the extraction of the vast coal reserves in the Highveld of South Africa. Previously backfilled and restored open cast areas are generally zoned for agricultural uses, but with growing pressures on land use, such areas are increasingly being considered for the expansion of infrastructure and regional development. Understanding the backfill permeability and hydraulic behaviour is therefore an important component in defining the land use restrictions placed on a previously backfilled area. Centrifuge modelling provides a me

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50

Bitter, Jamin J. "One-Dimensional Performance Modeling of Centrifugal Flow Vaned Diffusers." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1711.pdf.

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