Log in

Relevant bibliographies by topics / Struts (Engineering) Dynamics / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Struts (Engineering) Dynamics.

Dissertations / Theses on the topic 'Struts (Engineering) Dynamics'

Author: Grafiati

Published: 10 December 2022

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Struts (Engineering) Dynamics.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Aharon, Ofer S. M. Massachusetts Institute of Technology. "Stress distributions around hydrofoils using computational fluid dynamics." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/46382.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (leaf 108).<br>This research describes the reciprocal influence between two foils, vertically and horizontally oriented, on each other for different gaps between them. Those cases are the focus part of a bigger process of lowering significantly the drag of a ship when hydrofoils are attached to its hull. The research

APA, Harvard, Vancouver, ISO, and other styles

2

Yi, Jun 1959. "Stress compatible bimaterial interface elements with application to transient dynamic stress analysis." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22842.

Full text

Abstract:

Conventional displacement-based finite element programs do not yield unique values of stress components which ought to be continuous at element interfaces. The errors, being the differences from the correct unique values, become unacceptably large at a bimaterial interface when the moduli of the two materials are significantly different.<br>This thesis formulates and implements new finite elements for obtaining the correct values of the stress components, both continuous and discontinuous ones, at bimaterial interface points under general dynamic loading, assuming linear, isotropic, elastic ma

APA, Harvard, Vancouver, ISO, and other styles

3

Maksym, Geoffrey N. "Computer controlled oscillator for dynamic testing of biological soft tissue strips." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69742.

Full text

Abstract:

A computer controlled tissue strip oscillator has been constructed for the advanced study of lung parenchyma mechanics. The data acquisition and control are facilitated on a 486 personal computer. The tissue is maintained by a continuously circulating bath of Krebs-Ringer solution at 37$ sp circ$C bubbled with a 95% O$ sb2$ and 5% CO$ sb2$ gas mixture. The oscillator has a useful bandwidth to 20 Hz at 0.5 cm amplitude and step response with no overshoot at all amplitudes. The movement range of the motor is 5 cm with resolution 13.6 $ mu$m. The force resolution is 66 $ mu$N with a range of 0.25

APA, Harvard, Vancouver, ISO, and other styles

4

Rashedi, Ahmadreza. "The Design and Flow Dynamics of Non-Brownian Suspensions." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1598018383854045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Mikucka, Vita. "Dynamic problems for interface cracks under harmonic loading." Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=228606.

Full text

Abstract:

This thesis is devoted to solution of the two-dimensional elastodynamic problem for a cracked bimaterial loaded by harmonic waves. The system of boundary integral equations for displacements and tractions at the interface is obtained from Somigliana identity with the allowance for the contact interaction of the opposite crack faces. Full expressions of the integral kernels derived by the consecutive differentiation of the Green's displacement tensor are given. Due to the contact that takes place between the faces of the crack under the applied external loading, the resulting process is a stead

APA, Harvard, Vancouver, ISO, and other styles

6

Shim, Sang-Hea. "The effect of fluid flow on the stress corrosion cracking of sensitized type 304 stainless steel in 0.01 M Na₂SO₄ solution at 250⁰C /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487264603216315.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Marks, Christopher R. "Surface Stress Sensors for Closed Loop Low Reynolds Number Separation Control." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1309998636.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Massahi, Aidin. "Multi-resolution Modeling of Dynamic Signal Control on Urban Streets." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3349.

Full text

Abstract:

Dynamic signal control provides significant benefits in terms of travel time, travel time reliability, and other performance measures of transportation systems. The goal of this research is to develop and evaluate a methodology to support the planning for operations of dynamic signal control utilizing a multi-resolution analysis approach. The multi-resolution analysis modeling combines analysis, modeling, and simulation (AMS) tools to support the assessment of the impacts of dynamic traffic signal control. Dynamic signal control strategies are effective in relieving congestions during non-typi

APA, Harvard, Vancouver, ISO, and other styles

9

Farooque, Tanya Mahbuba. "Biochemical and mechanical stimuli for improved material properties and preservation of tissue-engineered cartilage." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26710.

Full text

Abstract:

Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Boyan, Barbara; Committee Chair: Wick, Timothy; Committee Member: Brockbank, Kelvin; Committee Member: Nenes, Athanasios; Committee Member: Sambanis, Athanassios. Part of the SMARTech Electronic Thesis and Dissertation Collection.

APA, Harvard, Vancouver, ISO, and other styles

10

Tadevosyan, Davit. "System dynamic framework for analyzing organizational stress : United States Postal Service case study." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/100365.

Full text

Abstract:

Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 102-106).<br>Stress, both individual and organizational, appears to be an increasing problem in any society, and more so in organizations. It already is taking a significant toll on corporate and national levels. Slow recovering economy and pressures on bottom lines, especially for financially constrained organizations, further emphasize the problem and

APA, Harvard, Vancouver, ISO, and other styles

11

Tucker, Russell P. "Validating a new in vitro model for dynamic fluid shear stress mechanobiology." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:0ea8b159-5cb6-4bf0-9a60-4c580824016a.

Full text

Abstract:

In vitro mechanotransduction studies, uncovering the basic science of the response of cells to mechanical forces, are essential for progress in tissue engineering and its clinical application. Many varying investigations have described a multitude of cell responses, however as the precise nature and magnitude of the stresses applied are infrequently reported and rarely validated, the experiments are often not comparable, limiting research progress. This thesis provides physical and biological validation of a widely available fluid stimulation device, a see-saw rocker, as an In vitro model for

APA, Harvard, Vancouver, ISO, and other styles

12

Tu, Wei. "Response modelling of pavement subjected to dynamic surface loading based on stress-based multi-layered plate theory." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1188066023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Krishnamoorthy, Mahesh kumaar. "Investigations on Linkages Between Blood Flow Dynamics and Histological Endpoints in Dialysis Access Fistula." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718697.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Johnson, Catherine E. "Fragmentation Analysis in the Dynamic Stress Wave Collision Regions in Bench Blasting." UKnowledge, 2014. http://uknowledge.uky.edu/mng_etds/16.

Full text

Abstract:

The first step in many mining operations is blasting, and the purpose of blasting is to fragment the rock mass in the most efficient way for that mine site and the material end use. Over time, new developments to any industry occur, and design and implementation of traditional techniques have to change as a consequence. Possibly the greatest improvement in blasting in recent years is that of electronic detonators. The improvements related to safety and increased fragmentation have been invaluable. There has been ongoing debate within the explosives industry regarding two possible theories for

APA, Harvard, Vancouver, ISO, and other styles

15

Anwar, Sohail. "Transient Stress and Strain Assessment of Marine Boiler : Fully Rigid Body Dynamics Coupled Finite Element Analyses." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-95440.

Full text

Abstract:

Operationally, marine components and structures such as boiler in a Ship, are exposed to varying mechanically and thermally induced forces. High-frequency mechanical loading arises from the cyclic pressure, temperature transients, and six directional Rapid Amplitude Operator (RAOs). These types of loadings are mainly in the elastic region usually denoted as high cycle fatigue (HCF), most pronounced during the start-up, and the shut-down sequence of operation, which are responsible for an astronomically reduction in Marine Boiler’s lifetime as compared to land boiler with same designed operati

APA, Harvard, Vancouver, ISO, and other styles

16

Lontine, Derek Michael. "Stress Modulated Grain Boundary Mobility." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7348.

Full text

Abstract:

This thesis consists of a thermodynamically based kinetic model that more accurately predicts grain boundary mobility (GBM) over a large range of thermodynamic states including changes in temperature, pressure and shear stress. The form of the model was validated against calculated GBM values for Al bicrystals via molecular dynamics (MD) simulations. A total of 98,786 simulations were performed (164 different GBs, each with a minimum of 250 different thermodynamic states, and 2 different driving forces). Methodology for the computation of the GBM via MD simulations is provided. The model param

APA, Harvard, Vancouver, ISO, and other styles

17

Nishii, Kenichiro. "MICRO-SCALE FLUID DYNAMICS AND ITS EFFECT ON HEPATIC PROGENITOR CELL REGENERATION ACTIVATION." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1461945701.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Peng, Shuzhi. "Acoustical wave propagator technique for structural dynamics." University of Western Australia. School of Mechanical Engineering, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0069.

Full text

Abstract:

[Truncated abstract] This thesis presents three different methods to investigate flexural wave propagation and scattering, power flow and transmission efficiencies, and dynamic stress concentration and fatigue failures in structural dynamics. The first method is based on the acoustical wave propagator (AWP) technique, which is the main part described in this thesis. Through the numerical implementation of the AWP, the complete information of the vibrating structure can be obtained including displacement, velocity, acceleration, bending moments, strain and stresses. The AWP technique has been

APA, Harvard, Vancouver, ISO, and other styles

19

Lindström, Stefan B. "Simulations of the Dynamics of Fibre Suspension Flows." Licentiate thesis, Mid Sweden University, Department of Natural Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-53.

Full text

Abstract:

<p>A new model for simulating non-Brownian flexible fibres suspended in a Newtonian fluid has been developed. Special attention has been given to include realistic flow conditions found in the industrial papermaking process in the key features of the model; it is the intention of the author to employ the model in simulations of the forming section of the paper machine in future studies.</p><p>The model considers inert fibres of various shapes and finite stiffness, interacting with each other through normal, frictional and lubrication forces, and with the surrounding fluid medium through hydrod

APA, Harvard, Vancouver, ISO, and other styles

20

Salehian, Ali. "PREDICTING THE DYNAMIC BEHAVIOR OF COAL MINE TAILINGS USING STATE-OF-PRACTICE GEOTECHNICAL FIELD METHODS." UKnowledge, 2013. http://uknowledge.uky.edu/ce_etds/9.

Full text

Abstract:

This study is focused on developing a method to predict the dynamic behavior of mine tailings dams under earthquake loading. Tailings dams are a by-product of coal mining and processing activities. Mine tailings impoundments are prone to instability and failure under seismic loading as a result of the mechanical behavior of the tailings. Due to the existence of potential seismic sources in close proximity to the coal mining regions in the United States, it is necessary to assess the post-earthquake stability of these tailings dams. To develop the aforementioned methodology, 34 cyclic triaxial

APA, Harvard, Vancouver, ISO, and other styles

21

Giardina, Ronald J. Jr. "On The Ramberg-Osgood Stress-Strain Model And Large Deformations of Cantilever Beams." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2377.

Full text

Abstract:

In this thesis the Ramberg-Osgood nonlinear model for describing the behavior of many diﬀerent materials is investigated. A brief overview of the model as it is currently used in the literature is undertaken and several misunderstandings and possible pitfalls in its application is pointed out, especially as it pertains to more recent approaches to ﬁnding solutions involving the model. There is an investigation of the displacement of a cantilever beam under a combined loading consisting of a distributed load across the entire length of the beam and a point load at its end and new solutions to t

APA, Harvard, Vancouver, ISO, and other styles

22

Wyman, Richard Durtschi. "Non-Schmid Effects and Criteria for Dislocation Nucleation on Different Slip Systems at Grain Boundaries." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6423.

Full text

Abstract:

Criteria for grain boundary dislocation nucleation are developed. A bicrystal containing two grain boundaries is placed under varying triaxial stress states using molecular dynamics. The local resolved shear, normal, and co-slip stresses needed for grain boundary dislocation nucleation are found. A framework is developed to detect the slip system grain boundary dislocation nucleation occurs on. A survey of the different ways grain boundary dislocation nucleation occurs in the sample shows a single grain boundary can nucleate dislocations in a rich variety of ways. Using the nucleation system a

APA, Harvard, Vancouver, ISO, and other styles

23

Sun, Allen Y. "An Experimental Study of the Dynamic Response of Spur Gears Having Tooth Index Errors." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430749459.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Sarker, Pratik. "Investigation of the Quenching Characteristics of Steel Components by Static and Dynamic Analyses." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1942.

Full text

Abstract:

Machine components made of steel are subjected to heat treatment processes for improving mechanical properties in order to enhance product life and is usually done by quenching. During quenching, heat is transferred rapidly from the hot metal component to the quenchant and that rapid temperature drop induces phase transformation in the metal component. As a result, quenching generates some residual stresses and deformations in the material. Therefore, to estimate the temperature distribution, residual stress, and deformation computationally; three-dimensional finite element models are develope

APA, Harvard, Vancouver, ISO, and other styles

25

Moreno, Chan Julian. "Moisture content in radiata pine wood : implications for wood quality and water-stress response : a thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in Forestry, School of Forestry, College of Engineering, University of Canterbury /." Thesis, University of Canterbury. School of Forestry, 2007. http://hdl.handle.net/10092/1217.

Full text

Abstract:

This thesis studied the influence of moisture content on the dynamic estimation of stiffness in wood of Pinus radiata D. Don. This is an important non-destructive measure for estimation of stiffness in standing trees, logs and lumber. Moisture content affects both acoustic velocity and density in the fundamental equation of dynamic MOE (DMOE = V²ρ, where V = acoustic velocity and ρ = density). Investigation included measurements with boards in the laboratory considering moisture contents below and above FSP as well as temperatures below and above 0°C. This also included field measurements of t

APA, Harvard, Vancouver, ISO, and other styles

26

Liu, Janet. "Design of a Novel Tissue Culture System to Subject Aortic Tissue to Multidirectional Bicuspid Aortic Valve Wall Shear Stress." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527077368757049.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Campbell, Jacob D. "Human Factors Study of Wrong-Way Driving Events." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1583926643197709.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Shar, Jason A. "Unraveling the Etiologies of Discrete Subaortic Stenosis: A Focus on Left Ventricular Outflow Tract Hemodynamics." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1621957266053636.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Blanco, Mark Richard. "Design and Qualification of a Boundary-Layer Wind Tunnel for Modern CFD Validation Experiments." Youngstown State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1559237473563483.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Zuanetti, Bryan. "Plate Impact Experiments for Studying the Dynamic Response of Commercial-Purity Aluminum at Temperatures Approaching Melt." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1557132337419911.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Ihala, Gallangage Gedara Maheshwara Arunakantha Prasad. "Hydrodynamics of open channel flow with partially occupied continuous double layered vegetation." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2024. https://ro.ecu.edu.au/theses/2930.

Full text

Abstract:

This doctoral thesis investigates the hydrodynamics of open channel flows interacting with double-layered vegetation, focusing on two configurations—uniform (A1) and mixed (A2)—that mimic river riparian growth. The study utilizes Laser Doppler Velocimetry (LDV) and Particle Image Velocimetry (PIV) to quantify critical flow characteristics, including streamwise and transverse velocities, Reynolds shear stress, turbulence, and vortex dynamics under conditions where vegetation occupies single and both banks. The dynamic effects of channel transitions from wide to narrow are studied utilizing aspe

APA, Harvard, Vancouver, ISO, and other styles

32

Fekrat, A. Qaium. "Calibration and Validation of EverFE2.24: A Finite Element Analysis Program for Jointed Plain Concrete Pavements." Ohio : Ohio University, 2010. http://www.ohiolink.edu/etd/view.cgi?ohiou1260557310.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Sharma, Abhinav. "ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON THE HIGH-WALL STABILITY." UKnowledge, 2017. https://uknowledge.uky.edu/mng_etds/38.

Full text

Abstract:

The stability of the high-walls is one of the major concerns for open pit mines. Among the various factors affecting the stability of high-walls, blast vibrations can be an important one. In general, worldwide the established respective government regulations and industry standards are used as guidance to determine the maximum recommended levels of the peak particle velocity and frequency from the blast to avoid any effects on the structures around the mining project. However, most of the regulations are meant for buildings or houses and do not concern high-walls. This thesis investigates the

APA, Harvard, Vancouver, ISO, and other styles

34

Gorgulu, Ilhan. "Numerical Simulation Of Turbine Internal Cooling And Conjugate Heat Transfer Problems With Rans-based Turbulance Models." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615000/index.pdf.

Full text

Abstract:

The present study considers the numerical simulation of the different flow characteristics involved in the conjugate heat transfer analysis of an internally cooled gas turbine blade. Conjugate simulations require full coupling of convective heat transfer in fluid regions to the heat diffusion in solid regions. Therefore, accurate prediction of heat transfer quantities on both external and internal surfaces has the uppermost importance and highly connected with the performance of the employed turbulence models. The complex flow on both surfaces of the internally cooled turbine blades is caused

APA, Harvard, Vancouver, ISO, and other styles

35

Cruel, Magali. "Caractérisation et optimisation de l'environnement mécanique tridimensionnel des cellules souches au sein des bioréacteurs d'ingénierie tissulaire osseuse." Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0011/document.

Full text

Abstract:

L’ingénierie tissulaire osseuse a récemment connu de nouveaux développements grâce à la prise en compte du phénomène de mécanotransduction dans la conception des bioréacteurs. Toutefois, des progrès restent à faire sur nos connaissances sur les mécanismes de la réponse des cellules souches mésenchymateuses (CSM) aux contraintes mécaniques en vue d’optimiser l’environnement mécanique tridimensionnel des cellules dans les bioréacteurs. L’objectif de cette thèse est double : déterminer le meilleur microenvironnement mécanique pour des CSM humaines et appliquer cet environnement au sein d’un bioré

APA, Harvard, Vancouver, ISO, and other styles

36

Aminjikarai, Vedagiri Srinivasa Babu. "An Automated Dynamic Fracture Procedure and a Continuum Damage Mechanics Based Model for Finite Element Simulations of Delamination Failure in Laminated Composites." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1242963775.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Anyanwu, Ezechukwu John. "The Effect of Flow on the Development and Retention of Iron Sulfide Corrosion ProductLayers." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1547118739941844.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Bunnell, Spencer Reese. "Real Time Design Space Exploration of Static and Vibratory Structural Responses in Turbomachinery Through Surrogate Modeling with Principal Components." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8451.

Full text

Abstract:

Design space exploration (DSE) is used to improve and understand engineering designs. Such designs must meet objectives and structural requirements. Design improvement is non-trivial and requires new DSE methods. Turbomachinery manufacturers must continue to improve existing engines to keep up with global demand. Two challenges of turbomachinery DSE are: the time required to evaluate designs, and knowing which designs to evaluate. This research addressed these challenges by developing novel surrogate and principal component analysis (PCA) based DSE methods. Node and PCA-based surrogates were c

APA, Harvard, Vancouver, ISO, and other styles

39

Andersson, Harald. "Numerical and experimental study of confluent jets supply device with variable airflow." Licentiate thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29271.

Full text

Abstract:

In recent years, application of confluent jets for design of ventilation supply devices has been studied. Similarly, numerus studies have been made on the potential and application of variable air volume (VAV) in order to reduce the energy demand of ventilation systems. This study investigates the combination of supply devices based on confluent jets and VAV, both in terms of the nearfield flow behavior of the device and the impact on thermal comfort, indoor air quality and energy efficiency on a classroom-level space when the airflow rate is varied. The method used in this study is an experim

APA, Harvard, Vancouver, ISO, and other styles

40

Mashiko, Naoto. "Comparative performance of ductile and damage protected bridge piers subjected to bi-directional earthquake attack." Thesis, University of Canterbury. Civil Engineering, 2006. http://hdl.handle.net/10092/1159.

Full text

Abstract:

Incremental Dynamic Analysis (IDA) procedures are advanced and then applied to a quantitative risk assessment for bridge structures. This is achieved by combining IDA with site-dependent hazard-recurrence relations and damage outcomes. The IDA procedure is also developed as a way to select a critical earthquake motion record for a one-off destructive experiment. Three prototype bridge substructures are designed according to the loading and detailing requirements of New Zealand, Japan and Caltrans codes. From these designs 30 percent reduced scale specimens are constructed as part of an

APA, Harvard, Vancouver, ISO, and other styles

41

Loret, Benjamin. "Problèmes numériques et théoriques de la géomécanique." Paris 6, 1986. http://www.theses.fr/1986PA066239.

Full text

Abstract:

Traitement numérique des milieux infinis de la géomécanique: méthodes d'équations intégrales régulières et singulières pour les structures géotechniques en conditions dynamiques; méthode de couplage itérative éléments finis/équations intégrales (applications au demi-espace et demi-plan); vibration d'un pieu fiché dans le demi espace stratifié. Comportement frottant des milieux granulaires: algorithmes locaux d'intégration numérique pour matériaux élastoplastiques type Drucker-Prager; partie élastique déformation des sols; influence de la contrainte moyenne. Problèmes liés à l'anisotropie en gr

APA, Harvard, Vancouver, ISO, and other styles

42

Zimmermann, Karsten. "Prognose und bergschadenkundliche Analyse dynamischer Bodenbewegungen durch oberflächennahen Steinkohlenbergbau in den USA." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-65009.

Full text

Abstract:

Der untertägige Abbau von Steinkohle führt zu Bewegungen des überlagernden Gebirges und der Tagesoberfläche. Eine Bewegungsprognose ist im Hinblick auf entstehende Bergschäden weltweit von großer Bedeutung. In dieser Arbeit wird untersucht, ob eine Prognose von Bodenbewegungen im amerikanischen Steinkohlenbergbau mit einem in Europa bewährten Verfahren, einem dynamischen stochastischen Senkungsmodell, möglich ist. Dazu wurde eine Literaturstudie über den bisherigen Kenntnisstand in den USA durchgeführt, abbaubegleitende Bodenbewegungsmessungen aus dem Steinkohlengebiet der Appalachen ausgewert

APA, Harvard, Vancouver, ISO, and other styles

43

Trad, Ayman. "Analyse du comportement et modélisation de structures souples de protection : le cas des écrans de filets pare-pierres sous sollicitations statique et dynamique." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00690546.

Full text

Abstract:

En région montagneuse, les infrastructures et les voies de communications sont soumises à de nombreux risques naturels dont les phénomènes d'origine gravitaire. Au-delà du danger pour les usagers, les conséquences des interruptions du trafic deviennent problématiques d'un point de vue économique et il devient indispensable de sécuriser les itinéraires. La mise en place d'écrans de filets pare-pierres est une des solutions possibles pour la protection contre les éboulements rocheux. Cette thèse porte sur l'étude des écrans souples ou filets métalliques de protection contre les chutes de blocs e

APA, Harvard, Vancouver, ISO, and other styles

44

Jakel, Roland. "Lineare und nichtlineare Analyse hochdynamischer Einschlagvorgänge mit Creo Simulate und Abaqus/Explicit." Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-171812.

Full text

Abstract:

Der Vortrag beschreibt wie sich mittels der unterschiedlichen Berechnungsverfahren zur Lösung dynamischer Strukturpobleme der Einschlag eines idealisierten Bruchstücks in eine Schutzwand berechnen lässt. Dies wird mittels zweier kommerzieller FEM-Programme beschrieben: a.) Creo Simulate nutzt zur Lösung die Methode der modalen Superposition, d.h., es können nur lineare dynamische Systeme mit rein modaler Dämpfung berechnet werden. Kontakt zwischen zwei Bauteilen lässt sich damit nicht erfassen. Die unbekannte Kraft-Zeit-Funktion des Einschlagvorganges muss also geeignet abgeschätzt und als äuß

APA, Harvard, Vancouver, ISO, and other styles

45

Sénégond, Nicolas. "APPROCHE TEMPORELLE DE LA SIMULATION ET DE LA CARACTÉRISATION DES TRANSDUCTEURS ULTRASONORES CAPACITIFS MICRO-USINÉS." Phd thesis, Université François Rabelais - Tours, 2010. http://tel.archives-ouvertes.fr/tel-00738359.

Full text

Abstract:

Les transducteurs ultrasonores capacitifs micro-usinés (cMUT : capacitive Micromachined Ultrasound Transducers) sont aujourd'hui une nouvelle alternative à la transduction d'ondes ultrasonores. En comparaison avec la technologie piézoélectrique, ils offrent de nombreuses potentialités en termes de fiabilité, de production, de miniaturisation et d'intégration, d'une électronique associée mais aussi en termes de performances acoustiques. Les voies d'application de ces dispositifs, dédiés initialement à l'imagerie médicale, sont aujourd'hui étendues à de nombreux domaines tels que la thérapie, le

APA, Harvard, Vancouver, ISO, and other styles

46

Mondelin, Alexandre. "Modélisation de l'intégrité des surfaces usinées : Application au cas du tournage finition de l'acier inoxydable 15-5PH." Phd thesis, Ecole Centrale de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00838512.

Full text

Abstract:

En usinage, la zone de coupe présente des conditions de température, des cinétiques thermiques, des déformations et des pressions extrêmes. Dans ce contexte, être capable de relier les variations des conditions de coupe (vitesse de coupe, avance, lubrification, usure, outil,...) à l'intégrité de la surface usinée constitue un objectif scientifique majeur. Cette thèse s'intéresse au cas du tournage finition du 15-5PH (acier inoxydable martensitique utilisé, entre autre, pour la fabrication des pièces de rotor d'hélicoptère ainsi que les pompes et les vannes de circuit primaire de centrale nuclé

APA, Harvard, Vancouver, ISO, and other styles

47

Chevalier, Thibaud. "Écoulements de fluides à seuil en milieux confinés." Phd thesis, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-00903850.

Full text

Abstract:

Afin de mieux comprendre les spécificités de l'écoulement des fluides en seuil en géométries confinées, nous avons opté pour une approche multi-échelle expérimentale et/ou numérique dans des milieux poreux complexes et modèles. Nous montrons qu'il est possible d'utiliser la RMN pour visualiser des écoulements de fluides à seuil en géométrie complexe. Dans un milieu poreux, il est également possible de mesurer la distribution statistique des vitesses, ceci sans problème de résolution spatiale, grâce à la méthodologie de réglage d'une expérience d'injection sous IRM que nous avons mise en place.

APA, Harvard, Vancouver, ISO, and other styles

48

Sahu, Mrutyunjaya. "Study on Boundary Shear Stress Distribution in Meandering Trapizoidal Open Channel Flow." Thesis, 2009. http://ethesis.nitrkl.ac.in/1107/1/TRAPIZOIDAL_OPEN_CHANNEL_FLOW.docx.

Full text

Abstract:

The determination of boundary shear stress distribution in meandering trapezoidal open channel flows is crucial in many critical engineering problems such as channel design, calculation of energy losses and sedimentation and in the study of shear stress distribution. In this study, velocity distribution is experimentally investigated in a smooth rectangular open channel. Wall shear stresses are calculated using measured local velocities. Assuming logarithmic velocity distribution along perpendiculars to a wetted perimeter, wall shear stresses were calculated. With the purpose of obtaining shea

APA, Harvard, Vancouver, ISO, and other styles

49

Wagner, Christopher Todd. "Effects of fluid dynamic shear stress on platelet aggregability under pathophysiologic conditions." Thesis, 1997. http://hdl.handle.net/1911/19227.

Full text

Abstract:

The objective of this work was to further our understanding of the influence hemodynamic forces have on the cardiovascular system. Specifically, the effect of shear stress on platelet aggregability under two pathophysiological conditions was studied. Elevated shear stress levels in stenosed vessels induce platelet aggregation. Increased plasma catecholamine concentrations have also been implicated in the onset of acute coronary ischemic syndromes. This first study was designed to examine the synergistic platelet activation by the interaction of shear stress and epinephrine. Platelets suspensio

APA, Harvard, Vancouver, ISO, and other styles

50

Langevin, Ariel Marie. "Dynamics and evolution of efflux pump-mediated antibiotic resistance." Thesis, 2021. https://hdl.handle.net/2144/41885.

Full text

Abstract:

Antibiotic resistance is a worldwide health threat, as bacteria continue to evade antibiotic treatment. In order to survive, bacteria utilize a number of resistance mechanisms, including efflux pumps, which efficiently export antibiotics outside of the cell to reduce intracellular damage. While such mechanisms are well known, there remains a significant gap in knowledge regarding how different environmental dynamics, such as the rate of antibiotic introduction or the diversity within a microbial community, play a role in resistance. In this work, we used the AcrAB-TolC efflux pump as a case st

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!