oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2018 ( 4 )

2017 ( 889 )

2016 ( 1323 )

2015 ( 16407 )

自定义范围…

匹配条件: “Javier García de la Figal” ,找到相关结果约606999条。
列表显示的所有文章,均可免费获取
第1页/共606999条
每页显示
Análisis dinámico de carcaza de caja de velocidad
García-de la Figal-Costales,Javier; Marrero-Osorio,Sergio;
Ingenier?-a Mec??nica , 2011,
Abstract: the work is a study of dynamic parameters and responses of a velocity transfer box structure, belonging to a heavy auto motor vehicle, under the action of rigorous work conditions. their natural frequencies, frequencies and impacts responses are determined. the most dangerous points in the complex analyzed system are determined and recommendations are made for their best design. everything through professional software of graphics draw and finite elements.
Sumulation of Plasma Torche Simulación de antorcha de plasma
Javier García de la Figal,Abel Fumero Pérez,René Collazo Carceller,Clodomiro Alves Junior
Revista Cubana de Ingeniería , 2010, DOI: 10.1234/rci.v1i3.26
Abstract: The work is a study about main work features and properties of plasma of argon for designing and building plasma torches, to be employed in the projection of fine particles. The plasma properties in feature of their temperature and pressure are determinate and their behaviors inside the main element of the torche: the nozzle, is simulated. The influence of nozzles characteristics in the obtained plasma is determined, from finite elements models developed, being ended up defining the best nozzle parameters to be designed and built. Se realiza un estudio de las principales características de trabajo y propiedades del plasma de argón para el posterior dise o y construcción de una antorcha de plasma y su empleo en la proyección de partículas finas. Se determinan las propiedades del plasma en función de su temperatura y presión, simulando su comportamiento dentro del principal elemento de la antorcha: la boquilla. A partir de los modelos de elementos finitos desarrollados se determinan las influencias de las características de la boquilla en el plasma obtenido, llegándose a definir los mejores parámetros de la boquilla y de la antorcha a ser dise ada y construida.
Análisis del comportamiento mecánico en una sección de la aorta
A. González-Martin,J. García-de la Figal
Revista de Ingeniería Mecánica , 2009,
Abstract: La importancia social de las enfermedades arteriales motiva el interés en desarrollar estudios sobre el comportamiento mecánico de las paredes arteriales que aporten información para la práctica médica, ya que estas enfermedades están fuertemente relacionadas con factores mecánicos como son los estados de deformación y tensión. El presente trabajo ofrece una metodología para analizar el comportamiento mecánico de una arteria (la aorta). Dicho análisis parte de una geometría real construida a partir de imágenes médicas. En la formulación del modelo de elementos finitos se escogió un material con comportamiento no-lineal, con grandes deformaciones, hiperelástico, no-homogéneo y ortótropico. A la hora de analizar los resultados logrados y compararlos con los resultados obtenidos por otros autores no es posible establecer una comparación debido a los diferentes métodos de ensayo empleados por distintos autores y la dificultad en la experimentación en arterias humanas, solo es posible establecer zonas criticas en las cuales se presente algún tipo de enfermedad arterial.The social importance of the arterial illnesses motivates the interest in developing studies on the mechanical behavior of the arterial walls. The medical practice has pointed that these illnesses are strongly related with mechanical factors, such as states of deformation and tension as other related parameters. The present work offers a methodology to analyze the mechanical behavior of an artery (the aorta). This analysis uses a real geometry model that has been built based on medical images. In the formulation of the finite elements model the material has been considered with a no-linear behavior, with big deformations, hyperplasic, no-homogeneous and orthotropic. It is not possible to establish comparisons between the achieved results and the ones obtained by other authors. That is due to the different methods used by different authors and the difficulty in the experimentation in humans. It was only possible to establish critical areas where some illnesses are presented
Evaluación de los gastos de explotación, económicos y energéticos en la labor de cultivo del frijol, tomate y papa comparando el tractor YUMZ-6M con yunta de bueyes
García de la Figal Costales,Armando E; Valdés Lima,Yusney; Vargas Hidalgo,Jiorqui;
Revista Ciencias T??cnicas Agropecuarias , 2012,
Abstract: with the objective of evaluating the exploitation, economic and energy expenses of two groups: tractor-cultivator and yoke of oxen-cultivator with three and one work organs, respectively, in the work of cultivation of the bean, tomato and potato in a floor red ferralitic, the times of each work, depth, wide, work speed and expense of fuel were measured. by means of the existent methodologies, these expenses were calculated, being necessary the energy expenses of the yoke of oxen. comparing the first group with the second, it was obtained that the yoke of oxen is more efficient economic and energetically that the first one. to cultivate 5,594; 6,007 and 14,90 ha for the tractor- cultivator in labour day of 8 h, for this cultivations, respectively, five, seven and nine yoke of oxen- cultivator working 6 h are required, and with double the width of work of the first group for its best conformation, is obtained that the tractor-cultivator is more efficient productive, economic and energetically that the yoke of oxen.
Análisis de la estabilidad del arado "FDN" de tracción animal
García de la Figal Costales,Armando Eloy; Diego Nava,Fidel;
Revista Ciencias T??cnicas Agropecuarias , 2010,
Abstract: for the analysis by the methods of the static of a plow of animal traction -manufactured fdn in oaxaca, mexico, a system of forces is used in the longitudinal-vertical plane of movement, applied in specific points of the organ of work of the same one, to 1/3 and 1/4 of its work depth, whose values vary from 440 to 1 200 n and of 20 to 260 n for the horizontal force rx and the vertical rz, respectively and their dimensions, weight, center of gravity and point of application of the shot, which is inclined ? of 200 and 180 regarding the horizontal one are known. the results demonstrate that for the conditions signal, this plow of animal traction can be before in static equilibrium-as first principle of the stability of the mobile systems outlined by lyapunov-if they are regulated or the vertically point where the plow is coupled to the helm or the longitude of the arm of work organ regarding the chassis of the plow, or both. displacing vertical necessary calculated they vary in: from 49,39 up to 163,33 mm, for when ?=180 and of 11,16 to 128,24 mm for ?=200. failure of the above realization, would imply that the chassis of the plow would rotate an angle ? of 4,760 in clockwise, until-1,020 in against, for ?=180 and of 2,760 in the address0 anticlockwise, for ?=200.
Análisis de la estabilidad del arado "FDN" de tracción animal
García de la Figal Costales,Armando Eloy; Diego Nava,Fidel;
Revista Ciencias T??cnicas Agropecuarias , 2010,
Abstract: for the analysis by the methods of the static of a plow of animal traction -manufactured fdn in oaxaca, mexico, a system of forces is used in the longitudinal-vertical plane of movement, applied in specific points of the organ of work of the same one, to 1/3 and 1/4 of its work depth, whose values vary from 440 to 1 200 n and of 20 to 260 n for the horizontal force rx and the vertical rz, respectively and their dimensions, weight, center of gravity and point of application of the shot, which is inclined ? of 200 and 180 regarding the horizontal one are known. the results demonstrate that for the conditions signal, this plow of animal traction can be before in static equilibrium-as first principle of the stability of the mobile systems outlined by lyapunov-if they are regulated or the vertically point where the plow is coupled to the helm or the longitude of the arm of work organ regarding the chassis of the plow, or both. displacing vertical necessary calculated they vary in: from 49,39 up to 163,33 mm, for when ?=180 and of 11,16 to 128,24 mm for ?=200. failure of the above realization, would imply that the chassis of the plow would rotate an angle ? of 4,760 in clockwise, until-1,020 in against, for ?=180 and of 2,760 in the address, until-1,50 anticlockwise, for ?=200.
Determinación del límite de rotura de un cable por Método de los Elementos Finitos.
F. Aguilar Parés,J. García de la Figal Costales
Revista de Ingeniería Mecánica , 2008,
Abstract: En ocasiones, se desconocen las características originales de un cable de acero. En estos casos, generalmente se estima el límite de rotura de un cable a partir del límite de rotura de un alambre del cable. En el presente trabajo, se propone emplear un método para estimar el límite de rotura del cable en base al modelado del cordón mediante elementos finitos. En el contenido se explica detalladamente el procedimiento y es ejemplificado. El procedimiento es iniciado con el dibujo del cable en un programa de dise o gráfico parámetrico y posteriormente se describen las características generales del modelado con un programa especializado en el Método de Elementos Finitos. En el análisis se incluye la influencia del contacto entre los alambres que forman el cordón. Por último, se comparan los resultados obtenidos para el límite de rotura del cable con los datos declarados por el fabricante. Con este procedimiento fueron obtenidos valores mediante modelado del cable con diferencias entre el 11% al 2,5% en relación al límite de rotura declarado por los fabricantes. Las diferencias fueron evidenciadas en dependencia de la calidad del mallado empleado.In occasions, the original characteristics of steel wire rope are unknown. In these cases, could be estimated the resistance of the wire rope knowing the wire resistance. In this proposal method for estimating the resistance load of steel wire the cord of the wire rope is modelling using finite elements. Procedure is explained and a sample with a selected wire rope is presented. It is started with the drawing of the wire rope by professional software. General characteristics of the modelling are described with FEM software. In the analysis, the contact influence in the wires of the cord is included. Lastly, the obtained results of the resistance loads of steel wire rope are compared with data on steel wire rope catalogue. Differences are obtained from 11% to 2.5% depending on the used mesh quality.
Modelación por el Método de los Elementos Finitos del proceso de infiltración de líquido en material poroso.
J. García de la Figal Costales,H. López Salinas
Revista de Ingeniería Mecánica , 2007,
Abstract: Se modela el proceso de infiltración de un liquido en un medio sólido poroso, asumiendo un cierto patrón de los poros (tama o, forma, % de porosidad, distribución). Se tienen en cuenta las propiedades del líquido, incluidas las propiedades de tensión superficial de su superficie libre. El material poroso es hidroxiapatita, semejante al tejido trabecular de los huesos.Todo se resuelve empleando el Método de los Elementos Finitos.The infiltration process of a liquid in a solid porous medium is modeled, assuming a certain pattern of the pores (size, forms,porosity%, distribution). The liquid properties, included the properties of superficial tension of their free surface, are considered. The porous material is hidroxiapatita, similar to trabecular tissue of bones. Everything is solved using the Finite Elements Method (FEM).
Las competencias profesionales como categoría integradora de los contenidos a través del modelo de formación profesional de la carrera Ingeniería Agrícola
Callejas Torres,Juan Carlos; García de la Figal Costales,Eloy; Buendía Eísman,Leonor; Berrocal de Luna,Emilio;
Revista Ciencias T??cnicas Agropecuarias , 2010,
Abstract: from the scientific problem stated on this paper, related to the insufficiency of agricultural engineering graduates, the main objective is the pedagogical educative process and the professional education model of this career in the university of ciego de avila. there is a study plan which includes the basic and pre- professional levels by means of term papers and disciplines, as well as thesis in the professional level. this is carried out by means of the technological processes in the different engineering systems. this professional education model gives a practical significance to the work.
Simulación mediante la dinámica de fluidos por computadora del efecto de la velocidad del viento en el desempe?o de los pulverizadores agrícolas de ventilador
Herrera Prat,Mario Ignacio; García de la Figal Costales,Armando; Ramos Carvajal,Ernesto; Martin Texeira,Mauri;
Revista Ciencias T??cnicas Agropecuarias , 2012,
Abstract: agricultural sprayers for the application of defensive uses a stream of air to achieve greater efficiency in their work, this is complicated by having to combine the droplet size and the aerodynamics of the airflow and in turn interact with the wind and the movement of the sprayer. the effectiveness in covering the tree pesticide droplets is directly related to the transport capacity of the air stream and is the main cause of losses by drift if not used properly. the computational fluid dynamics can easily study the aerodynamics of the air stream by simulating the conditions of this work. knowledge the aerodynamics of the current of air is an instrument for achieving control parameters and rational work regimes in the sprayer. in the study were used as experimental model, the integral spray "ass-800" using an axial fan "vl610". the analysis of the aerodynamics of the current of air is carried out at a working speed of the sprayer of 3,6 km/h wind speed of 5 m/s at angles of 300, 450 and 600 with respect to the direction of movement of the sprayer.
第1页/共606999条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.