Examinando por Materia "Modeling"

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  • Miniatura
    PublicaciónAcceso abierto
    Modeling of an automated integral logistics system using colored petri nets
    (Universidad del Valle, 2019-01-30) Ochoa, Maria P.; Davila, Julian
    (Eng) A system is a set of heterogeneous elements that work in direct relation with each other for a specific pur - pose; through its automation, it is possible to carry out productive processes with machines, without the direct participation of a human operator. The Automated Integrated Logistics System (SALI by it’s acronym in Spanish) is a didactic environment that allows to emulate the activities and operation of a Logistic Dis - tribution Center (DC), developed at the New Granada Military University as a teaching and learning tool for engineering. The current system programming in the software system allows a serial processing of a purchase order, from the moment in which the customer, passing through all the stations, until it is sent to a delivered point, requires the product. The present investigation presents a modeling of the system through Colored Petri Nets (CPN) it’s made, with the purpose of achieve a better understanding of the dynamics of the system, the relationships between the stations, the flow of materials during the process and the cycles of these over the stations; as well as identifying the restrictive stations within the process that are susceptible to an improvement to be raised in a future work.
  • Miniatura
    PublicaciónAcceso abierto
    Propuesta de entrepiso para viviendas de uno y dos pisos en sistema constructivo liviano : Evaluación a carga vertical estática y modelación en elementos finitos.
    (2015-05-11) Madera, Ingrid E.; Guerrero, Aydée P.; Madera, Carlos A.
    Como alternativa de entrepiso para las viviendas del sistema constructivo liviano, se desarrolló una propuesta basada en el trabajo en conjunto de materiales y elementos livianos ya existentes, logrando una respuesta adecuada ante las solicitaciones de carga estática. Este sistema se fundamentó en la utilización de perfiles livianos de acero rolados en frío, adosados a una loseta de ferrocemento a través de conectores de cortante. Inicialmente, se ensayaron a flexión dos propuestas del sistema para determinar las cargas últimas y las deflexiones causadas por carga de servicio. Empleando los resultados obtenidos y la metodología de elementos finitos con el programa Ansys Ins., se realizó un modelo computacional para simular el ensayo a flexión realizado en una de las probetas estudiadas, llevando a cabo un análisis estático tridimensional no lineal de acuerdo a las propiedades de los materiales empleados en la probeta, a las condiciones de apoyo del ensayo y a la carga aplicada. Este modelo, fue posteriormente ajustado según los resultados del ensayo, identificando los parámetros que incidían en la respuesta estática del sistema, lo cual servirá para predecir el comportamiento a flexión de losas de este tipo con diferentes configuraciones geométricas. Abstract As an alternative slab system for lightweight housing construction, a composite slab was developed based on the combined work of existing materials and lightweight elements, achieving a good static load behavior. In this system cold formed steel joists were used linked to ferrocement slab through shear connectors. Initially, two system assemblies were tested to flexural load in order to determinate ultimate loads and deflection caused by service loads. A computational model was produced using the finite element method with the Ansys Ins. program to calibrate the experimental tests. It was used to simulate the flexural tests made on the studied specimens; a static three-dimensional nonlinear analysis was elaborated in accordance to the materials properties used in the specimen, the support conditions and the applied load. Then this model was adjusted in accordance to the test´s results, identifying the parameters that influence the static behavior of the system which will be useful to predict the behavior to flexion of this type of slabs for different geometric configurations.