Дисертації з теми "Nonlinear static"
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Friesecke, Gero. "Static and dynamic problems in nonlinear mechanics." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1458.
Повний текст джерелаSeywald, Klaus. "Wingbox Mass Prediction considering Quasi-Static Nonlinear Aeroelasticity." Thesis, KTH, Flygdynamik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-59014.
Повний текст джерелаObst, Andreas W. "Nonlinear static and transient analysis of generally laminated beams." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10102009-020113/.
Повний текст джерелаAtik, Malik. "Seismic evaluation of tall building structures using nonlinear static procedures." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10116/document.
Повний текст джерелаNon linear dynamic analysis constitutes the most powerful method for the assessment of the non linear seismic response of structures subjected to strong earthquake motions. Considering the complexity associated to time history analysis, the use of nonlinear static techniques, or pushover analysis constitutes an efficient and easy to use alternative to dynamic analysis. This thesis develops innovative static nonlinear method to assess the seismic behavior of high-rise buildings. It is composed of three parts:In the first part, the continuum model which constitutes a simple and efficient tool to analyze high-rise wall-frame buildings is revisited. The influence of calculation precision in specifying the optimum level of wall curtailment is discussed. The relationship between the curtailment level and the resulting internal forces is investigated. The second part proposes a new single-run adaptive pushover method for the seismic assessment of shear wall structures. This method has two main advantages: It is practical tool to integrate the effect of higher modes with full interaction between them and it overcomes the criticisms forwarded against the previous single-run adaptive pushover analyses. The proposed method is presented as well as its numerical implementation. The third part presents an innovative method to specifying the seismic peak response quantities of the tall structures. The principle of the single-run adaptive pushover procedures is integrated with the capacity spectrum method proposed by ATC-40 (1996). Where, this latter is limited for structures that vibrate primarily in the fundamental mode
Shafiei-Tehrany, Reza. "Nonlinear dynamic and static analysis of I-5 Ravenna Bridge." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/R_Shafiei-Tehrany_112608.pdf.
Повний текст джерелаTitle from PDF title page (viewed on Apr. 10, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 127-133).
Shi, Guangyu. "Nonlinear static and dynamic analyses of large-scale lattice-type structures and nonlinear active control by piezo actuators." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/19176.
Повний текст джерелаSotoudeh, Zahra. "Nonlinear static and dynamic analysis of beam structures using fully intrinsic equations." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41179.
Повний текст джерелаSakamoto, Takashi. "Nonlinear static and dynamic analysis of flexible risers subjected to vortex excitation." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309379.
Повний текст джерелаVorfolomeyeva, Yuliya. "Nonlinear static analysis of rubble-stone masonry buildings performed with equivalent frame method." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Знайти повний текст джерелаKoko, Tamunoiyala Stanley. "Super finite elements for nonlinear static and dynamic analysis of stiffened plate structures." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30723.
Повний текст джерелаApplied Science, Faculty of
Civil Engineering, Department of
Graduate
Shyu, In-Ming Kevin. "Forced, nonlinear, planar and nonplanar oscillations of a cantilvered beam including static deflection." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-06062008-171257/.
Повний текст джерелаOzmun, Phillip M. "Nonlinear control and design methodologies for electrostatic MEMS devices." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/OZMUN__16.pdf.
Повний текст джерелаGaheen, Mohammed El-Nabawey A. "Static and dynamic finite element analysis of pneumatic tyres including anisotropic and nonlinear effects." Thesis, Cranfield University, 1987. http://hdl.handle.net/1826/3406.
Повний текст джерела朱達善 and Dashan Zhu. "Nonlinear static and dynamic analysis of plates & shells by spline finite strip method." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31231743.
Повний текст джерелаPacitti, Arnaud. "Nonlinear modeling of elastic cables : experimental data-based tension identification via static inverse problem." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1142/document.
Повний текст джерелаKnowledge of the tension in bridge cables is important not only to diagnostic the cable itself but also the construction it belongs to.The work presented in this thesis proposes to evaluate the tension of a geometrically exact cable using a static inverse method from a mixed variational formulation, by coupling simply and cheaply a universal cable model with usual sensors, such as displacement sensors and strain gauges. Contrarily to existing methods, a good knowledge of the cable's parameters, such as it length or weight per unit length, is not required.Combining a thorough study of various cable typologies encountered on bridges and the vast amounts of material available in the bibliography covering cables, lead to the modeling following the elastic theory of rods developed by the Cosserat brothers, François and Eugène, elaborating on their theory of rods with and without flexural stiffness.The experimental apparatus, designed and built in the course of this study, allowed to successfully validate the developed inverse method on a multilayered strand cable 21 m long and 22 mm in diameter at several tension levels. The universal aspect of the model introduced and its successful validation encourages its implementation to other cable typologies
Zhu, Dashan. "Nonlinear static and dynamic analysis of plates & shells by spline finite strip method /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12427020.
Повний текст джерелаJiang, Yaqun 1955. "Development of a new pipe element for static and dynamic analysis of nonlinear problems." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282325.
Повний текст джерелаRazzaq, Raja Javed. "Nonlinear static and dynamic analysis of composite layered plates and shells using finite strip methods." Thesis, Cranfield University, 2003. http://hdl.handle.net/1826/4049.
Повний текст джерелаKim, Taehyoun 1959. "Nonlinear large amplitude structural and aeroelastic behavior of composite rotor blades at large static deflection." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/43251.
Повний текст джерелаPezeshky, Payam. "Distortional Static and Buckling Analysis of Wide Flange Steel Beams." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36074.
Повний текст джерелаBeauregard, Matthew Alan. "Nonlinear Dynamics of Elastic Filaments Conveying a Fluid and Numerical Applications to the Static Kirchhoff Equations." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194164.
Повний текст джерелаBoberg, Frida. "Simulation of dynamic and static behavior of an electrically powered lift gate." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11627.
Повний текст джерелаContinental Automotive Systems is a German company that develops control systems for different applications in cars. A control system for electrically powered lift gates that are opened or closed on the driver’s command is one of the products developed. The drive system itself is composed of a spindle that is driven by a DC-motor over a gear and a spring. When developing the control system it is convenient to use a simulation model instead of having to implement it on the system every time. The simulation analytically describes how the system is behaving.
In this thesis a simulation model of a drive system and a lift gate is developed and evaluated. The model parameters are estimated using System Identification Toolbox in Matlab.
Continental Automotive Systems är ett tyskt företag som utvecklar styrsystem för olika tillämpningar i bilar. Bland annat utvecklas ett styrsystem till eldrivna bakluckor som öppnas och stängs av föraren per knapptryck. Själva drivanordningen består av en skruv som drivs av en likströmsmotor över en utväxling och en fjäder. Då man vill utveckla styrsystemet utan att behöva implementera det på systemet varje gång är en simuleringsmodell av drivanordningen och luckan ett bra hjälpmedel. Denna simuleringsmodell kan då analytiskt beräkna hur systemet uppför sig.
I detta examensarbete har en simuleringsmodell av en drivanordning med tillhörande lucka utvecklats och utvärderats. Modellparametrarna estimerades med hjälp av System Identification Toolbox i Matlab.
Nguyen, Huy The [Verfasser], and Utz von [Akademischer Betreuer] Wagner. "Nonlinear Quasi-static and Dynamic Behavior of Piezoceramics at Moderate Strains / Huy The Nguyen. Betreuer: Utz von Wagner." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2011. http://d-nb.info/1017355398/34.
Повний текст джерелаNguyen, Huy The Verfasser], and Utz von [Akademischer Betreuer] [Wagner. "Nonlinear Quasi-static and Dynamic Behavior of Piezoceramics at Moderate Strains / Huy The Nguyen. Betreuer: Utz von Wagner." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2011. http://nbn-resolving.de/urn:nbn:de:kobv:83-opus-33025.
Повний текст джерелаAlamri, Amro Abdullah. "DEVELOPING A FULL THREE-DIMENSIONAL MODEL OF SELF-CENTERING CONCENTRICALLY BRACED FRAME SYSTEMS USING NONLINEAR STATIC PUSHOVER ANALYSIS." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627680240922479.
Повний текст джерелаRAIMUNDO, JULIANA DE MATOS PONTE. "INFLUENCE OF THE NONLINEAR FLEXURAL AND SWAY INTERACTION ON THE STATIC AND DYNAMIC INSTABILITY OF A CONCEPTUAL MODEL OF COLUMN." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35769@1.
Повний текст джерелаCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
A estabilidade das colunas de um pórtico plano depende da importância relativa da rigidez à flexão e rigidez lateral de cada coluna e elementos adjacentes. Um exemplo típico é a maior capacidade de carga de pórticos planos com restrição lateral em comparação com pórticos semelhantes, sem restrição lateral. Também esta restrição tem uma influência importante na resposta pós-crítica e na sensibilidade à imperfeição da estrutura. A carga de flambagem pode ser dominada pela rigidez à flexão da coluna ou pela rigidez das restrições laterais. Dependendo dos valores relativos desses parâmetros, pode ocorrer interação modal. Nesse caso, podem surgir vários caminhos pós-críticos, acoplados e desacoplados, levando a uma topologia complexa da energia potencial total com vários pontos críticos (máximos, mínimos e selas). Os caminhos pós-críticos instáveis influenciam na sua capacidade de carga e na sensibilidade da estrutura a imperfeições. Isso leva a um complexo comportamento dinâmico não linear da estrutura carregada axialmente. No presente trabalho, um modelo conceitual de dois graus de liberdade de um elemento de pórtico plano sob compressão é estudado. Uma análise detalhada é realizada a fim de estudar como a rigidez lateral influencia: os comportamentos pré- e pós-crítico, a instabilidade paramétrica do modelo sob uma excitação harmônica axial e o comportamento ressonante do sistema estrutural carregado axialmente sob uma excitação de base; contribuindo para uma melhor compreensão da resposta não linear desta classe de estruturas. A análise das bifurcações mostra que a estrutura pode exibir várias soluções estáveis e instáveis coexistentes, levando a bacias de atração entrelaçadas, cuja topologia controla a integridade dinâmica da estrutura em um ambiente dinâmico. Para estudar o comportamento não linear do modelo, foram utilizadas várias estratégias numéricas para obter os caminhos de equilíbrio não lineares, pontos fixos estáveis e instáveis, diagramas de bifurcação e bacias de atração.
The stability of columns in a portal frame depends on the relative importance of the flexural and lateral stiffness of the column and connected elements. A typical example is the higher load capacity of non-sway frames as compared with that of similar frames with no lateral restrain. Also this restrain has an important influence on the post-critical response and imperfection sensitivity of the structure. The buckling load may be either dominated by the flexural stiffness of the columns or by the stiffness of the lateral restrains. Depending on the relative values of these parameters, interactive buckling may occur. In such case, several coupled and uncoupled post-buckling paths may arise, leading to a complex topology of the energy landscape with several critical points (maxima, minima and saddles). The resulting unstable post-buckling paths influence the structure s imperfection sensitivity and load carrying capacity of the structure. This leads to an involved nonlinear dynamic behaviour of the axially loaded structure. In the present work, a conceptual two-degree-of-freedom model of a plane-frame column is studied. A detailed analysis is conducted to study how the lateral stiffness influences the static buckling and post-buckling behavior, the parametric instability of the model under under axial harmonic excitation and the resonant behavior of the axially loaded structural system under base excitation, contributing to a better understanding of the nonlinear response of this class of structures. The bifurcation analysis shows that the structure may display several coexisting stable and unstable solutions, leading to intertwining basins of attraction, whose topology controls the dynamic integrity of the structure in a dynamic environment. To study the non-linear behavior of the model, several numerical strategies were used to obtain the nonlinear equilibrium paths, stable and unstable fixed points, bifurcation diagrams and basins of attraction.
Kapoor, Hitesh. "Nonlinear Dynamic Response of Flexible Membrane Structures to Blast Loads." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/41238.
Повний текст джерелаMaster of Science
Navarro, D., R. Valero, and J. Orihuela. "Evaluation of the Influence of Different Grades of Reinforcing Steel on the Seismic Performance of Concrete reinforced Frame Structures with Nonlinear Static Analysis." IOP Publishing Ltd, 2021. http://hdl.handle.net/10757/655954.
Повний текст джерелаLeung, Colin. "SENSITIVITY OF SEISMIC RESPONSE OF A 12 STORY REINFORCED CONCRETE BUILDING TO VARYING MATERIAL PROPERTIES." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/681.
Повний текст джерелаCrabtree, Owen I. "A numerical study of nonlinear static and dynamic behavior of a square thin plate-membrane structure for application to a MEMS micro-generator." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/Fall2004/o%5Fcrabtree%5F101304.pdf.
Повний текст джерелаBaylis, Charles Passant II. "Improved Techniques for Nonlinear Electrothermal FET Modeling and Measurement Validation." Scholar Commons, 2007. https://scholarcommons.usf.edu/etd/620.
Повний текст джерелаBolander, Julie Christine. "Investigation of Torsional Effects on Thirteen-Story Reinforced Concrete Frame-Wall Structure Modeled in ETABS and SAP2000 Using Linear and Nonlinear Static and Dynamic Analyses." Thesis, University of California, San Diego, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1557303.
Повний текст джерелаThe primary objective of this thesis is to evaluate the effects of torsion on the nonlinear seismic response of a thirteen-story reinforced concrete frame-wall structure with an asymmetric stiffness in plan. The NEHRP building structure, located in Berkeley, CA and previously designed by André Barbosa, was modeled in ETABS and SAP2000 to perform several analyses. The models accounted for realistic cracked concrete section stiffnesses, expected material properties, and nonlinear plastic hinges. Due to limitations of ETABS in performing nonlinear dynamic time history analysis, the model was exported to SAP2000. An asymmetric lateral stiffness model was created by moving one of the shear walls from the center of the building toward the outside of the building. OpenSees was used to find the nonlinear hinge moment-rotation relationships.
Using a suite of seven ground motion record pairs, an essentially linear dynamic time history analysis was performed on the symmetric and asymmetric ETABS models. The SAP2000 models were used to perform a series of nonlinear static (pushover) analyses. Fully nonlinear, including material and geometric nonlinearity, time history analyses were performed on the SAP2000 models using the seven ground motion pairs, appropriately cut to shorter lengths to reduce the analysis run-time. In each analysis case, the results of the symmetric and asymmetric models were compared. Overall, the asymmetric model typically experienced torsional effects and larger displacement responses than the symmetric model. The more nonlinear the structure behaved, the more influence torsion had on the response of the model with asymmetrically-placed shear walls.
Heim, Eugene Henry DeWendt. "Development of Methods for Improved Data Integrity and Efficient Testing of Wind Tunnel Models for Dynamic Test Conditions in Unsteady and Nonlinear Flight Regimes." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31050.
Повний текст джерелаMaster of Science
Sapkota, Suman. "Seismic Capacity Evaluation of Reinforced Concrete Buildings Using Pushover Analysis." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544707728674621.
Повний текст джерелаCevik, Deniz. "Determination Of The Change In Building Capacity During Earthquakes." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607085/index.pdf.
Повний текст джерелаCarloni, Federico. "A 3D model based on the SAM Method for seismic studies of masonry buildings." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17151/.
Повний текст джерелаKaymak, Yalcin. "A Composite Frame/joint Super Element For Structures Strengthened By Externally Bonded Steel/frp Plates." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1052547/index.pdf.
Повний текст джерелаPathak, Rakesh. "The Effects of Diaphragm Flexibility on the Seismic Performance of Light Frame Wood Structures." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27947.
Повний текст джерелаPh. D.
Fernández, López Rodrigo Miguel, and Velásquez Ricardo Timoteo Zapata. "Análisis y diseño estructural de una torre de 40 pisos y 4 sótanos siguiendo normas peruanas incluyendo su desempeño sísmico en el distrito de Santiago de Surco, Lima." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652425.
Повний текст джерелаIn the present investigation, the analysis and structural design of a 40-storey tower and 4 reinforced concrete basements will be carried out following Peruvian regulations and the calculation of seismic performance in the Santiago de Surco district, Lima. For this, the hypothesis states whether the Peruvian standards meet the desired seismic resistance performance for a tall tower like this one. For a progressive understanding, first a description will be made of the tall tower to study, its architecture, structure, soil and others. In the second part, the concepts necessary to understand the types of static linear analysis, dynamic linear analysis and static non-linear analysis will be given. The materials will be defined, the moment - rotation diagrams will also explain the obtaining of the building capacity curve. Wind and performance level concepts will be discussed. In the third part, we will proceed with seismic analysis complying with the seismic resistance requirements, we will also do the wind analysis to compare both effects. In the fourth chapter, the structural design will be carried out using the reinforced concrete standards. In chapter five the performance analysis will be done using the pushover method to finally get the results of this project and the conclusions of this development.
Tesis
Cott, Andrew. "An examination of analysis and optimization procedures within a PBSD framework." Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2318.
Повний текст джерелаBaylis, Charles Passant II. "Improved Current-Voltage Methods for RF Transistor Characterization." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/950.
Повний текст джерелаYu, Xiaoyang. "Dynamic acoustic emission for the characterization of the nonlinear behavior of complex materials." Thesis, Le Mans, 2020. http://www.theses.fr/2020LEMA1019.
Повний текст джерелаAcoustic emission (AE) is well known to be an efficient structural health monitoring technique to detect the creation and propagation of micro-cracks within structural materials such as concrete or composites when submitted to quasi-static stresses. Based on adequate signal processing methods, different research studies have established links between the detected AE hits and the created micro-damages. Other works have shown that it is possible to correlate the relaxation time in composites and the energy of the damage mechanisms measured during the quasi-static loading using the recorded AE hits. This thesis proposes to use an original experimental protocol to probe the nonlinear relaxation of concrete samples at the intact and damaged states. This protocol is based on the use of AE to passively probe the nonlinear relaxation of concrete samples instead of the weak amplitude signal usually used in slow dynamics experiments. Results show that passive and active probing methods lead to equivalent relaxation times. Furthermore, AE probing reveals the existence of a ‘silence period’ during the first minutes of the nonlinear relaxation after which AE hits start to be detected. In addition, the characteristics of AE hits recorded during the passive relaxation showed a clear resemblance to those obtained during the damaging of the same samples, where shear and compression mechanisms are involved. For the clustering of the AE hits, in addition to use of an unsupervised pattern recognition approach to cluster the detected AE hits, this work proposes a novel ‘image- based AE classification’ approach based on continuous wavelet transform (CWT) and convolutional neural network (CNN). Results related to the nonlinear dynamic and quasi-static AE data show that both signal processing approaches have high classification accuracy, which represents a great interest in the development of dynamic AE methods in the presence of micro-cracks
Okur, Abdullah. "Comparison Of Seismic Assessment Procedures In The Current Turkish Code." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609197/index.pdf.
Повний текст джерелаy district of istanbul, was assessed according the linear elastic and nonlinear static procedures given in the 2007 Turkish Earthquake Code. In addition, it was retrofitted by adding shear walls to the structural system and same assessment procedures were performed. In the last case study, building is re-designed according to the code and re-assessed. Comparative results and conclusions were summarized in the last chapter.
Ozcelik, Ramazan. "Seismic Upgrading Of Reinforced Concrete Frames With Structural Steel Elements." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613450/index.pdf.
Повний текст джерелаscaled three bay-two story frame specimens strengthened with chevron brace and ISF were tested by employing continuous pseudo dynamic testing methods. The test results indicated that the cyclic performance of the Xbrace and column with shear plate assemblage technique were unsatisfactory. On the other hand, both chevron brace and ISF had acceptable cyclic performance and these two techniques were found to be candidate solutions for seismic retrofitting of deficient RC structures. The numerical simulations by conducting nonlinear static and dynamic analysis were used to estimate performance limits of the RC frame and steel members. Suggested strengthening approaches, chevron brace and ISF, were also employed to an existing five story case study RC building to demonstrate the performance efficiency. Finally, design approaches by using existing strengthening guidelines in Turkish Earthquake Code and ASCE/SEI 41 (2007) documents were suggested.
Gilbert, Gregory S. Jr. "Scaling a Prismatic Revolute Joint (Pr) Manipulator Using Similitude and Buckingham Pi Techniques." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36599.
Повний текст джерелаMaster of Science
Weis, Lukáš. "Materiálově nelineární řešení konstrukcí z plastů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-234540.
Повний текст джерелаIsoldi, Liércio André. "Análise estática e dinâmica de estruturas delgadas de materiais compostos laminados incluindo materiais piezelétricos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/14378.
Повний текст джерелаIt is well known that laminate composite materials are nowadays commonly used in the aeronautical, aerospace, naval and other industries mainly because their attractive properties as compared to isotropic materials, such as higher stiffness/weight, higher strength, higher damping and good properties related to thermal or acoustic isolation, among others. However, the behavior of structures made of composite materials can be improved using smart materials. Among several kinds of commercially available smart materials, the piezoelectric materials are widely used as sensors and actuators for the monitoring and control of structures. The direct piezoelectric effect states that a mechanical strain applied to the material is converted to an electric charge. On the other hand, the converse piezoelectric effect states that an electric potential applied to the material is converted to mechanical strain. These effects govern the electromechanical interaction in piezoelectric materials. The finite element method, a widely accepted and powerful tool for analyzing complex structures, is capable of dealing with the integration of smart components and classic structural parts. So, linear and geometrically nonlinear static and dynamic behavior of thin laminate composite structures embedded with piezoelectric layers are analyzed in this work using the Finite Element Method (FEM). Triangular elements, called GPL-T9, with three nodes and six degrees of freedom per node (three displacement and three rotation components) and one degree of freedom per piezoelectric layer (electrical potential) are used. For static analysis the nonlinear equilibrium equations are solved using the Generalized Displacement Control Method (GDCM) while the dynamic solution is performed using the classical Newmark Method with an Updated Lagrangean Formulation (ULF). The system of equations is solved using the Gradient Cojugate Method (GCM) and in nonlinear cases an iterative-incremental scheme is employed. Several numerical examples are presented and compared with results obtained by other authors with different kind of elements and different schemes. The agreement among these results demonstrates the validity and effectiveness of the developed models.
Hakala, Tim. "Settling-Time Improvements in Positioning Machines Subject to Nonlinear Friction Using Adaptive Impulse Control." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1061.
Повний текст джерелаBraun, Michael Rainer. "Characterization of nonlinearity parameters in an elastic material with quadratic nonlinearity with a complex wave field." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26566.
Повний текст джерелаCommittee Chair: Jacobs, Laurence; Committee Co-Chair: Qu, Jianmin; Committee Member: DesRoches, Reginald. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Duzce, Zeynep. "Performance Evaluation Of Existing Medium Rise Reinforced Concrete Buildings According To 2006 Turkish Seismic Rehabilitation Code." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607834/index.pdf.
Повний текст джерелаnon-linear analysis (pushover analysis with equivalent lateral load method and mode superposition method) and non-linear time history analysis. In this study, linear elastic analysis with equivalent lateral loads and non-linear static analysis (pushover analysis) with equivalent lateral loads are investigated comparatively. SAP2000 software is used for pushover analysis
however the plastic rotation values obtained from SAP2000 are not used directly but defined according to the code procedures. Post-elastic rotations at yielding sections are transferred to Excel and the corresponding strains are calculated from these rotations by Excel Macro. These strains are compared with strain limits described in the 2006 Turkish Seismic Rehabilitation Code to obtain the member performances. In the linear elastic procedure, structural analysis is performed also by SAP2000 to obtain the demand values, whereas the capacity values are calculated by another Excel Macro. With these demand and capacity values, corresponding demand to capacity ratios are calculated and compared with demand to capacity ratio limits described in 2006 Turkish Seismic Rehabilitation Code to obtain the member performances. Global performances of the buildings are estimated from the member performances and from the inter-storey drifts for both two methods. The results are compared to each other, and critically evaluated.