Bibliografías temáticas / Limit analysis

Literatura académica sobre el tema "Limit analysis"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 7 de julio de 2024

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Artículos de revistas sobre el tema "Limit analysis"

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Boccuto, Antonio y Xenofon Dimitriou. "Abstract Theorems on Exchange of Limits and Preservation of (Semi)continuity of Functions and Measures in the Filter Convergence Setting". Journal of Function Spaces 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/4237423.

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We give necessary and sufficient conditions for exchange of limits of double-indexed families, taking values in sets endowed with an abstract structure of convergence, and for preservation of continuity or semicontinuity of the limit family, with respect to filter convergence. As a consequence, we give some filter limit theorems and some characterization of continuity and semicontinuity of the limit of a pointwise convergent family of set functions. Furthermore, we pose some open problems.
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Laptev, A. y Yu Safarov. "Szegö Type Limit Theorems". Journal of Functional Analysis 138, n.º 2 (junio de 1996): 544–59. http://dx.doi.org/10.1006/jfan.1996.0075.

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Perko, L. M. "Multiple Limit Cycle Bifurcation Surfaces and Global Families of Multiple Limit Cycles". Journal of Differential Equations 122, n.º 1 (octubre de 1995): 89–113. http://dx.doi.org/10.1006/jdeq.1995.1140.

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Yu, H. S., R. Salgado, S. W. Sloan y J. M. Kim. "Limit Analysis versus Limit Equilibrium for Slope Stability". Journal of Geotechnical and Geoenvironmental Engineering 124, n.º 1 (enero de 1998): 1–11. http://dx.doi.org/10.1061/(asce)1090-0241(1998)124:1(1).

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Leshchinsky, Dov, H. S. Yu, R. Salgado, S. W. Sloan y J. M. Kim. "Limit Analysis versus Limit Equilibrium for Slope Stability". Journal of Geotechnical and Geoenvironmental Engineering 125, n.º 10 (octubre de 1999): 914–18. http://dx.doi.org/10.1061/(asce)1090-0241(1999)125:10(914).

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PENG, YUE-JUN y JÉRÉMY RUIZ. "TWO LIMIT CASES OF BORN–INFELD EQUATIONS". Journal of Hyperbolic Differential Equations 04, n.º 04 (diciembre de 2007): 565–86. http://dx.doi.org/10.1142/s0219891607001264.

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We study two limit cases λ → ∞ and λ → 0 in Born–Infeld equations. Here the parameter λ > 0 is interpreted as the maximal electric field in the electromagnetic theory and the case λ = 0 corresponds to the string theory. Formal limits are governed by the classical Maxwell equations and pressureless magnetohydrodynamics system, respectively. For studying the limit λ → ∞, a new scaling is introduced. We give the relations between these limits and Brenier high and low field limits. Finally, using compensated compactness arguments, the limits are rigorously justified for global entropy solutions in L∞ in one space dimension, based on derived uniform estimates and techniques for linear Lagrangian systems.
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Tzavaras, A. E. "Elastic as Limit of Viscoelastic Response, in a Context of Self-Similar Viscous Limits". Journal of Differential Equations 123, n.º 1 (noviembre de 1995): 305–41. http://dx.doi.org/10.1006/jdeq.1995.1166.

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Hirokawa, Kichinosuke. "Limit of Trace Analysis." Materia Japan 35, n.º 11 (1996): 1222–25. http://dx.doi.org/10.2320/materia.35.1222.

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Jensen, Aage P. "Limit analysis of welds". Journal of Constructional Steel Research 11, n.º 3 (enero de 1988): 205–35. http://dx.doi.org/10.1016/0143-974x(88)90042-9.

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Markley, N. G. y M. H. Vanderschoot. "Remote limit points on surfaces". Journal of Differential Equations 188, n.º 1 (febrero de 2003): 221–41. http://dx.doi.org/10.1016/s0022-0396(02)00065-7.

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Tesis sobre el tema "Limit analysis"

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BARROS, GUILHERME COELHO GOMES. "TOPOLOGY OPTIMIZATION CONSIDERING LIMIT ANALYSIS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=29908@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Este trabalho apresenta uma formulação puramente baseada em plasticidade para ser aplicada à otimização topológica. A principal ideia da otimização topológica em mecânica dos sólidos é encontrar a distribuição de material dentro do domínio de forma a otimizar uma medida de performance e satisfazer um conjunto de restrições. Uma possibilidade é minimizar a flexibilidade da estrutura satisfazendo que o volume seja menor do que um determinado valor. Essa é a formulação clássica da otimização topológica, que é vastamente utilizada na literatura. Não obstante fornecer resultados interessantes, condições adicionais devem ser levadas em consideração para viabilizar sua aplicação prática. O projeto estrutural aborda dois aspectos principais: (i) a estrutura não deve colapsar, suportando os carregamentos aplicados (critério de segurança); e (ii) deverá se sujeitar a um valor máximo aceitável de deformação (critério de aceitabilidade). Consequentemente, a otimização topológica clássica deve ser modificada de forma a encontrar a distribuição de material correspondente ao menor volume possível tal que o critério de segurança seja verificado. O referido critério de segurança pode ser definido como limitar as tensões elásticas ao critério de plastificação em todo o domínio. Esta definição resultou em um novo ramo de pesquisa: a otimização topológica com restrições de tensões. Por outro lado, entende-se que o projeto estrutural plástico é preferível quando um projeto ótimo é almejado, uma vez que permite um maior aproveitamento da resistência do material. Dessa forma, este trabalho aborda a incorporação do projeto estrutural plástico à otimização topológica como método mais vantajoso do que a otimização topológica clássica e a com restrições de tensões. A formulação proposta é uma extensão da análise limite, que fornece uma estimativa da carga de colapso de uma estrutura diretamente por meio da programação matemática, assegurando a eficiência computacional da metodologia proposta. De forma a verificar a otimização topológica plástica e comparar a topologia final com as obtidas através da otimização topológica clássica e da com restrição de tensões, são apresentados exemplos numéricos.
This work presents a full plastic formulation to be applied within topology optimization. The main idea of topology optimization in solid mechanics is to find the material distribution within the domain so that it optimizes a performance measure and satisfies a set of constraints. One might seek to minimize the compliance satisfying that the volume is less than a given value. The aforementioned formulation is the standard topology optimization which has been used widely in literature. Although it provides interesting results, additional requirements must be taken into account when practical application is concerned. Structures are designed considering two main aspects: (i) the structure must not collapse, supporting the applied loads (safety criterion); and (ii) its displacements must be lower than a prescribed bound (serviceability criterion). Consequently, the standard formulation shall be modified, finding the material distribution corresponding to the minimum volume such that the safety criterion is met. Said safety criterion may be defined as restraining the elastic stresses to the yield criterion in the entire domain. This definition has resulted in a new branch in this research field: the stress constrained topology optimization. On the other hand, it is understood that the plastic design criterion is preferable when optimization is intended, since it fully exploits the material strength. Therefore, this work addresses the incorporation of the plastic design criterion into topology optimization as a more advantageous method than standard and stress constrained topology optimization methods. The proposed formulation is an extension of limit analysis, which provides an estimative of the collapse load of a structure directly through mathematical programming, ensuring computational efficiency to the proposed methodology. Lastly, numerical examples are shown to verify plastic topology optimization and the final topology is compared with those provided by standard and stress constrained topology optimization methods.
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Rabiei, Nima. "Decomposition techniques for computational limit analysis". Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/284217.

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Limit analysis is relevant in many practical engineering areas such as the design of mechanical structure or the analysis of soil mechanics. The theory of limit analysis assumes a rigid, perfectly-plastic material to model the collapse of a solid that is subjected to a static load distribution. Within this context, the problem of limit analysis is to consider a continuum that is subjected to a fixed force distribution consisting of both volume and surfaces loads. Then the objective is to obtain the maximum multiple of this force distribution that causes the collapse of the body. This multiple is usually called collapse multiplier. This collapse multiplier can be obtained analytically by solving an infinite dimensional nonlinear optimisation problem. Thus the computation of the multiplier requires two steps, the first step is to discretise its corresponding analytical problem by the introduction of finite dimensional spaces and the second step is to solve a nonlinear optimisation problem, which represents the major difficulty and challenge in the numerical solution process. Solving this optimisation problem, which may become very large and computationally expensive in three dimensional problems, is the second important step. Recent techniques have allowed scientists to determine upper and lower bounds of the load factor under which the structure will collapse. Despite the attractiveness of these results, their application to practical examples is still hampered by the size of the resulting optimisation process. Thus a remedy to this is the use of decomposition methods and to parallelise the corresponding optimisation problem. The aim of this work is to present a decomposition technique which can reduce the memory requirements and computational cost of this type of problems. For this purpose, we exploit the important feature of the underlying optimisation problem: the objective function contains one scaler variable. The main contributes of the thesis are, rewriting the constraints of the problem as the intersection of appropriate sets, and proposing efficient algorithmic strategies to iteratively solve the decomposition algorithm.
El análisis en estados límite es una herramienta relente en muchas aplicaciones de la ingeniería como por ejemplo en el análisis de estructuras o en mecánica del suelo. La teoría de estados límite asume un material rígido con plasticidad perfecta para modelar la capacidad portante y los mecanismos de derrumbe de un sólido sometido a una distribución de cargas estáticas. En este contexto, el problema en estados límite considera el continuo sometido a una distribución de cargas, tanto volumétricas como de superficie, y tiene como objetivo hallar el máximo multiplicador de la carga que provoca el derrumbe del cuerpo. Este valor se conoce como el máximo factor de carga, y puede ser calculado resolviendo un problema de optimización no lineal de dimensión infinita. Desde el punto de vista computacional, se requieren pues dos pasos: la discretización del problema analítico mediante el uso de espacios de dimensión finita, y la resolución del problema de optimización resultante. Este último paso representa uno de los mayores retos en el proceso del cálculo del factor de carga. El problema de optimización mencionado puede ser de gran tamaño y con un alto coste computacional, sobretodo en el análisis límite tridimensional. Técnicas recientes han permitido a investigadores e ingenieros determinar cotas superiores e inferiores del factor de carga. A pesar del atractivo de estos resultados, su aplicación práctica en ejemplos realistas está todavía obstaculizada por el tamaño del problema de optimización resultante. Posibles remedios a este obstáculo son el diseño de técnicas de descomposición y la paralelizarían del problema de optimización. El objetivo de este trabajo es presentar una técnica de descomposición que pueda reducir los requerimientos y el coste computacional de este tipo de problemas. Con este propósito, se explotan una propiedad importante del problema de optimización: la función objetivo contiene una único escalar (el factor de carga). La contribución principal de la tesis es el replanteamiento del problema de optimización como la intersección de dos conjuntos, y la propuesta de un algoritmo eficiente para su resolución iterativa.
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Fishwick, Rupert John. "Limit analysis of rigid block structures". Thesis, University of Portsmouth, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310412.

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PACHAS, MAURO ARTEMIO CARRION. "LIMIT ANALYSIS WITH LARGE SCALE OPTIMIZER AND RELIABILITY ANALYSIS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=31860@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
PROGRAMA DE EXCELENCIA ACADEMICA
O presente trabalho tem por objetivo desenvolver um otimizador eficiente de grande escala, que permita a aplicabilidade prática da Análise Limite Numérica pelo MEF, para resolver problemas reais da Engenharia Geotécnica. Para isto, foi desenvolvido um otimizador para o programa GEOLIMA (GEOtechnical LIMit Analysis) (Carrión, 2004) baseado no algoritmo de Pontos Interiores, computacionalmente mais eficiente que os otimizadores comerciais existentes. Pelo fato das propriedades do solo serem de natureza aleatória, a possibilidade de aplicar Análise de Confiabilidade com a Análise Limite pelo método FORM em problemas geotécnicos é pesquisada também. Sendo a grande vantagem do método FORM a possibilidade de se aplicar para funções de falha quaisquer e variáveis com distribuição quaisquer. Inicialmente, são apresentados os fundamentos da teoria de Análise Limite e sua formulação numérica pelo MEF (Método dos Elementos Finitos). A seguir, é investigada a possibilidade de se usar otimizadores comerciais para resolver o problema matemático resultante da aplicação de Análise Limite com o MEF e são descritos os fundamentos teóricos do otimizador implementado baseado no algoritmo de Pontos Interiores. Um resumo dos fundamentos teóricos da Análise de Confiabilidade é apresentado. É descrito o processo de cálculo pelo método FORM e dois exemplos de aplicação são realizados. Finalmente, análises de diferentes problemas resolvidos com o otimizador implementado são apresentados indicando o grande potencial da Análise Limite Numérica, na solução de problemas reais da Engenharia Geotécnica.
This work has, as its main objective, the development of an efficient and large scale optimizer, that allows the practical application of Numerical Limit Analysis (NLA) with Finite Element Method (FEM) to solve real problems in Geotechnical Engineering. For that purpose, an optimizer was developed for GEOLIMA (GEOtechnical LIMit Analysis) program (Carrión, 2004), based on Interior Points algorithm, computationally more efficient than the existing commercial optimizers. Due to the fact that soils have random properties, the possibility to apply Reliability Analysis with Limit Analysis using the FORM method was also investigated. Initially, Limit Analysis theory was presented together with its numerical formulation using the FEM. In sequence, the use of commercial optimizers was investigated in order to solve the resulting mathematical problem. Subsequently, the theorical foundations of the developed optimizer, based on the Interior Points algorithm were described. A summary of Reliability Analysis was also presented together with a description of computational procedures using FORM and two examples were developed. Finally, analyses of different problems solved with developed optimizer were presented. The obtained results demonstrated the great potential of Numerical Limit Analysis (NLA), in the solution of real problems in Geotechnical Engineering.
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Liu, Ying y 劉影. "Limit equilibrium methods for slope stability analysis". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B42576684.

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Li, Haorong 1969. "Preliminary forming limit analysis for advanced composites". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/37741.

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Ahmed, Husham. "Limit analysis of structures : novel computational techniques". Thesis, University of Sheffield, 2005. http://etheses.whiterose.ac.uk/14871/.

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Compared with elastic deformation analysis techniques, limit analysis methods that are amenable to computerization have yet to reach the same level of development. Yet such work has important practical value. The present work is primarily concerned with the development of a general model for the limit analysis of reinforced concrete (RC) and masonry structures. A novel limit analysis method for RC slabs and bridge decks that overcomes the problems encountered by previous workers ill this field has been developed. Ultimate load analyses have been carried out by discretizing the slab deck into a large number of rigid elements. Novel mathematical rules to describe how adjacent elements should interact with each other have been used in the formation of the requisite Linear Programming (LP) tableau. Appropriate state-of-the-art algorithms have been employed to solve the underlying linear programming problem. The results obtained agree quite well with known exact solutions for various different slab configurations, boundary conditions and loading arrangements. An attempt to obtain a rigorous upper-bound solution (i.e. satisfying kinematical admissibility criteria) using the method ability to identify sensible failure patterns has also been made, and rigorous upper-bound solutions have been obtained for a number of problems. In the context of masonry structures, a new computational limit analysis procedure for rigid block assemblages comprising non-associative frictional interfaces has been developed in this thesis. The procedure involves the successive solution of simple LP sub-problems. Behaviour of a contact in each sub-problem is governed by a Mohr-Coulomb failure surface with an effective cohesion intercept and an initially negative angle of friction. Both these parameters are updated at each iteration by referring to the real problem, with the angle of friction also being successively relaxed towards zero (thereby implying zero dilatancy). The procedure has been applied to a wide variety of example problems, including benchmark problems from the literature and also to much larger problems. For one such problem contained in the literature, it has been found that the load factor computed using the proposed procedure was virtually identical to that computed previously but this has been obtained two orders of magnitude more quickly. Recent developments to the RING cornputational limit analysis software for masonry arch bridges are also described (non-associative friction, gross-displacement analysis features). A number of examples of local authority bridge problems are reassessed in the light of the new features. The new version of RING (version 1.5) has been found to be much faster with execution speeds up to 200 times faster than the previous version.
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Liu, Ying. "Limit equilibrium methods for slope stability analysis". Click to view the E-thesis via HKUTO, 2002. http://sunzi.lib.hku.hk/hkuto/record/B42576684.

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Vasquez, Elizabeth Danielle. "Designing anisotropic friction through limit curve analysis". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123249.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (page 26).
Friction is an essential component of robotic manipulation which is highly dependent on contact surfaces. In practical applications, these surfaces are often anisotropic, a property that has been known to produce interesting movements in nature and uncertainty in human applications. Therefore, control of anisotropic frictional surfaces could result in more precise movement in manipulation, locomotion, and other facets touched by frictional contact. To arrive at such controllability, frictional force was collected across a spectrum of anisotropic micro-textures, and a limit curve was generated. Experimental data was analyzed in accordance to friction laws such as limit curve and maximum-inequality principle (MPI). Qualitative observation and residual sum of squares (RSS) was used to detect lack of normality and non-convexity within each limit curve. This lack of both normality and convexity contradicts MPI and suggests that an alternative model is necessary. Additionally, the anisotropic frictional behaviors observed advances the feasibility of "designing" micro-textures capable of controllable anisotropic friction.
by Elizabeth Danielle Vasquez.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering
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Bourne-Webb, Peter John. "Ultimate limit state analysis of embedded retaining walls". Thesis, Imperial College London, 2004. http://hdl.handle.net/10044/1/7862.

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Libros sobre el tema "Limit analysis"

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Howe, J. Gavin. Analysis of VASCAR. Washington, D.C.]: U.S. Dept. of Transportation, National Highway Traffic Safety Administration, 1991.

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Sawzcuk, A. Limit analysis of plates. Warszawa: Polish Scientific Publishers, 1993.

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Chen, Wai-Kai. Limit analysis and soil plasticity. Ft. Lauderdale, FL: J. Ross Pub., 2007.

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1971-, Hoang Linh, ed. Limit analysis and concrete plasticity. 3a ed. Boca Raton: Taylor & Francis, 2010.

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Chen, Wai-Kai. Limit analysis and soil plasticity. Ft. Lauderdale, FL: J. Ross Pub., 2007.

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Chen, Wai-Kai. Limit analysis in soil mechanics. Amsterdam, Netherlands: Elsevier, 1990.

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Limit analysis and concrete plasticity. 2a ed. Boca Raton: CRC Press, 1999.

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Limit analysis of solids and structures. Boca Raton: CRC Press, 1996.

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Csörgö, M. Limit theorems in change-point analysis. Chichester: Wiley, 1997.

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Fishwick, Rupert John. Limit analysis of rigid block structures. Portsmouth: University of Portsmouth, Dept. of Civil Engineering, 1996.

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Capítulos de libros sobre el tema "Limit analysis"

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Verruijt, Arnold. "Limit Analysis". En An Introduction to Soil Mechanics, 301–3. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61185-3_38.

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Moy, Stuart S. J. "Limit Analysis". En Plastic Methods for Steel and Concrete Structures, 80–102. London: Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-13810-4_4.

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Smith, D. Lloyd. "Plastic Limit Analysis". En Mathematical Programming Methods in Structural Plasticity, 61–82. Vienna: Springer Vienna, 1990. http://dx.doi.org/10.1007/978-3-7091-2618-9_5.

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Novozhilov, Igor V. "Correctness of limit models". En Fractional Analysis, 137–222. Boston, MA: Birkhäuser Boston, 1997. http://dx.doi.org/10.1007/978-1-4612-4130-0_6.

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Ploberger, Werner. "Central limit theorems". En Macroeconometrics and Time Series Analysis, 46–52. London: Palgrave Macmillan UK, 2010. http://dx.doi.org/10.1057/9780230280830_5.

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Bleyer, Jeremy. "Limit Analysis of Plates". En Encyclopedia of Continuum Mechanics, 1–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53605-6_135-1.

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Towhata, Ikuo. "Pseudostatic Limit Equilibrium Analysis". En Springer Series in Geomechanics and Geoengineering, 120–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-35783-4_7.

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Bleyer, Jeremy. "Limit Analysis of Plates". En Encyclopedia of Continuum Mechanics, 1469–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-55771-6_135.

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Topping, Peter M. "Ricci Flow and Ricci Limit Spaces". En Geometric Analysis, 79–112. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53725-8_3.

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Ploberger, Werner. "Functional central limit theorems". En Macroeconometrics and Time Series Analysis, 99–104. London: Palgrave Macmillan UK, 2010. http://dx.doi.org/10.1057/9780230280830_12.

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Actas de conferencias sobre el tema "Limit analysis"

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Pingaro, Natalia, Gabriele Milani y Simone Tiberti. "Automatic CAD kinematic limit analysis approach for the limit analysis of masonry towers". En INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0026420.

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BLANCHARD, PH, M. PASQUINI y M. SERVA. "CLASSICAL LIMIT: LOCALIZATION INDUCED BY NOISE". En Historical Analysis and Open Questions. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793560_0004.

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Marino, Francesco, Max Rotunno, Paolo Petritoli, Christophe Roux y Samir Bennani. "Spacecraft Limit Cycle Analysis". En AIAA Guidance, Navigation, and Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-4997.

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Crismale, Vitonofrio. "A projective central limit theorem and interacting Fock space representation for the limit process". En Noncommutative Harmonic Analysis with Applications to Probability. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2007. http://dx.doi.org/10.4064/bc78-0-5.

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Dereziński, Jan y Wojciech De Roeck. "Reduced and extended weak coupling limit". En Noncommutative Harmonic Analysis with Applications to Probability. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2007. http://dx.doi.org/10.4064/bc78-0-7.

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Leshchinsky, Ben. "Comparison of Limit Equilibrium and Limit Analysis for Complex Slopes". En Geo-Congress 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412787.129.

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Tiţa, Nicolae, Anca Armăşelu, Theodore E. Simos, George Psihoyios, Ch Tsitouras y Zacharias Anastassi. "On Some Limit Scales of Approximation Ideals". En NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2011: International Conference on Numerical Analysis and Applied Mathematics. AIP, 2011. http://dx.doi.org/10.1063/1.3636784.

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Bloebaum, C., W. Hong y A. Peck. "Improved move limit strategy for approximate optimization". En 5th Symposium on Multidisciplinary Analysis and Optimization. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-4337.

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de Waal, Johannes P. "Wave Growth Limit in Shallow Water". En Fourth International Symposium on Ocean Wave Measurement and Analysis. Reston, VA: American Society of Civil Engineers, 2002. http://dx.doi.org/10.1061/40604(273)58.

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Chapman, Gary y Leslie Yates. "Limit cycle analysis of planetary probes". En 37th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-1022.

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Informes sobre el tema "Limit analysis"

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Khan, Nisar y Kumares Sinha. An Analysis of Speed Limit Policies for Indiana. West Lafayette, IN: Purdue University, 2001. http://dx.doi.org/10.5703/1288284313136.

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Fliller, Raymond, Stephen Kramer y Richard Faussete. Hazard Analysis for 90 MeV Booster Injection Energy Limit. Office of Scientific and Technical Information (OSTI), mayo de 2016. http://dx.doi.org/10.2172/1504885.

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Zhao, Yu, Dong-Yang Wang, Hao Li, Xiao-Chun Liu, Hong Ding, Xuan-Ye Li y Xiao-Yan Yun. BEYOND CODE LIMIT ANALYSIS OF LARGE-SPAN COAL STORAGE SHED. The Hong Kong Institute of Steel Construction, diciembre de 2018. http://dx.doi.org/10.18057/icass2018.p.170.

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Kalambay, Panick y Srinivas Pulugurtha. Exploring Traffic Speed Patterns for the Implementation of Variable Speed Limit (VSL) Signs. Mineta Transportation Institute, diciembre de 2023. http://dx.doi.org/10.31979/mti.2023.2318.

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Traffic congestion is a prevalent issue during peak travel hours on roads in the United States. This study focuses on identifying suitable road links in Charlotte, North Carolina, for implementing variable speed limit (VSL) signs. Real-world traffic speed data collected over one year was analyzed to identify specific road links with favorable characteristics for VSL sign installations. The analysis considered weekdays, weekends, and specific times of the day to capture variations in speed patterns. The results revealed that roads with lower speed limits consistently experienced speeds exceeding the posted speed limits, suggesting additional enforcement or safety measures. For roads with higher speed limits, mean speeds were generally close to the speed limits, but the 85th percentile speeds exceeded them, indicating a potential need for speed management measures. Road links with a 45/50 mph speed limit display a unique pattern compared to other clusters. The mean speed on these roads decreases as the standard deviation increases. The findings contribute to understanding traffic speed patterns and provide valuable insights for transportation planning and management.
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Best, Cody, Carl Hart y Christopher Donnelly. Porosity measurement device design and analysis. Engineer Research and Development Center (U.S.), junio de 2024. http://dx.doi.org/10.21079/11681/48651.

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Porosity measurements are necessary to fully characterize the acoustic properties of a porous material. Many methods exist to measure porosity with various limitations. This report details a system based on previous work to limit environmental effects on measurements.
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Walshire, Lucas, Joseph Dunbar y Benjamin Breland. Stability analysis of Old River Low Sill Structure. Engineer Research and Development Center (U.S.), septiembre de 2022. http://dx.doi.org/10.21079/11681/45349.

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An updated stability analysis was performed on the Old River Low Sill Structure due to a change in the operating conditions from historic river sedimentation. Sedimentation of the Mississippi River channel since the 1973 spring flood has caused higher river stages at lower discharges. Numerical methods used included nonlinear analysis of pile group stability, seepage analyses, and limit equilibrium methods. The structure’s foundation was compromised during the 1973 flood, and emergency repairs were conducted to prevent scouring and undermining of the foundation by the flood scour. Rehabilitation included the reconstruction of a failed wing wall on the left abutment, rock and riprap fill in the forebay channel, and emergency grouting to fill the scour hole beneath the structure. An operating restriction was emplaced to limit the differential head across the structure due to flood damage. Taking these conditions into account, results from an updated analysis showed that full headwater uplift caused increased tension in the piles, while the increased body load caused increased compressive loads in the piles. Review of piezometric monitoring and the seepage analyses showed that full headwater uplift is unlikely, indicating the foundation grouting adequately sealed the scour hole beneath the structure. Analysis results exhibited lower magnitude compression and tension loads in the piles with design load cases compared to previous analyses. Recommendations from these analyses indicate that increased monitoring and additional investigation may support increasing the differential head limitation.
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De Lucia, Frank C. Techniques for SMM/THz Chemical Analysis: Investigations and Exploitation of the Large Molecule Limit. Fort Belvoir, VA: Defense Technical Information Center, marzo de 2014. http://dx.doi.org/10.21236/ada605741.

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Science, Fera. Analysis of CBD Products. Food Standards Agency, noviembre de 2022. http://dx.doi.org/10.46756/sci.fsa.cis490.

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The Food Standards Agency commissioned Fera Science Ltd. to carry out a survey to obtain a snapshot of CBD products on sale in England and Wales in order to inform FSA risk assessment of CBD products. Thirty CBD products were purchased from a range of online sellers from England and Wales. Samples comprised of two broad categories: oils and sprays, and edibles (including beverages). The sampling followed a scheme suggested by FSA. This is not a statistically representative sample of the market and instead provides a snapshot of the current market, to assist the design of future sampling and surveillance activity. There is the potential for residues of chemicals to be present in CBD products as a result of their natural occurrence in the raw material or arising from the manufacturing process, for example, mycotoxins, metals, pesticides, and the residues of solvents used to extract CBD. This study informs the FSA’s understanding of the type and levels of contaminants that may arise in CBD products. A wide range of analysis on CBD products was undertaken using accredited methods, for heavy metals, Polycyclic Aromatic Hydrocarbons (PAHs), pesticides, mycotoxins, CBD content and cannabinoid profiles. Analysis for residual solvents and additional mycotoxins was also carried out, but these were not accredited. The results of testing found the following: Heavy metals (cadmium, mercury & lead) and arsenic were not detected in the majority of samples, meaning levels were below the limits of quantification of the method. Seven samples contained lead, four samples arsenic and two samples contained cadmium. Mercury was not found in any sample. A definitive statement as to whether products exceed maximum levels cannot be made due to uncertainty as to whether products would be classified as a food (i.e. oil) or a food supplement. A low incidence of low levels of mycotoxins, with Fusarium mycotoxins found more frequently than aflatoxins and ochratoxin A, mostly at the methods reporting limit. Three samples were found to contain ochratoxin A at the methods reporting limit. A total of seven pesticide residues were found across all of the products (each product was tested for over 400 pesticides). There are no specific Maximum Residue Limits (MRL) for CBD products. One oil product was found to have PAHs above the regulated levels, if classed as a product for direct consumption. If classed as a food supplement the PAHs were within regulated levels. Three samples contained residual solvents. One product was over the MRL. Most products contained CBD close to the declared value. Two oils had substantially different levels than that declared (one higher and one lower). CBD was not detected in one of the drink products. These are potentially non-compliant with compositional and standards requirements. Delta 9-THC was detected in 87 % (26) of the samples analysed. Of these 40% (12) were found to have THC+ (the total sum of illicit cannabinoids in the product) above the 1mg threshold outlined in current Home Office guidance (Opens in a new window).
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Wang, Yong-Yi. PR-350-174511-R01 Development of Rational Ovality Limits. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), mayo de 2020. http://dx.doi.org/10.55274/r0011669.

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The present work investigated the implication of ovality on pipes under static collapse and fatigue failure limit states. The impact of key contributors to each limit state was quantified through finite element analysis. The feasibility of a uniform ovality limit was explored. Recommendations were provided on the direction and methodology of future research.
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Ebeling, Robert, Barry White, John Hite, James Tallent, Locke Williams, Brad McCoy, Aaron Hill, Cameron Dell, Jake Bruhl y Kevin McMullen. Load and resistance factors from reliability analysis Probability of Unsatisfactory Performance (PUP) of flood mitigation, batter pile-founded T-Walls given a target reliability index (𝛽). Engineer Research and Development Center (U.S.), julio de 2023. http://dx.doi.org/10.21079/11681/47245.

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This technical report documents the research and development (R&D) study in support of the development of a combined Load and Resistance Factor Design (LRFD) methodology that accommodates both geotechnical and structural design limit states for design of the US Army Corps of Engineers (USACE) batter pile-founded, reinforced concrete flood walls. Development of the required reliability and corresponding LRFD procedures has been progressing slowly in the geotechnical topic area as compared to those for structural limit state considerations, and therefore this has been the focus of this first-phase R&D effort. This R&D effort extends reliability procedures developed for other non-USACE structural systems, primarily bridges and buildings, for use in the design of batter pile-founded USACE flood walls. Because the foundation system includes batter piles under flood loading, the design procedure involves frame analysis with significant soil structure interaction. Three example batter pile-founded T-Wall flood structures on three different rivers have been examined considering 10 geotechnical and structural limit states. Numerical procedures have been extended to develop precise multiple limit state Reliability calculations and for complete LRFD analysis of the example batter pile-founded, T-Wall reinforced concrete, flood walls.
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