Que es un volante3/28/2023 ![]() La eficiencia del proceso requiere eficiencia computacional en ambos niveles. Estos procesos pueden reportar claros beneficios en entornos industriales pero su elevado coste computacional es un gran inconveniente. La optimización de forma estructural es un proceso iterativo constituido por un nivel superior que propone las geometrías a analizar, y un nivel inferior que evalúa numéricamente la respuesta estructural de estas, normalmente mediante el método de los elementos finitos (MEF). Keywords: Matrix, element, compatibility, balance, constitutive, nodal forces. The practical examples studied, using as a base the rectangu-lar element of 4 nodes, show somewhat improved results with respect to those obtained with the traditional FEM. Since the system of equations used in this procedure is given in all the unknowns of the problem explicitly, and it is possible to impose any kind of restriction on any of these unknowns, so that, in addition to the conditions of essential support to avoid movement as a solid rigid, conditions of equilibrium are imposed on every one of the elements that discretize the structure, as well as the conditions of tension in the perimeter of the domain conditions that, since it is not possible to be considered with the traditional FEM, this one is forced to sink some errors originated by a greater distance between the modeling to be adopted and the physical real fact. But, whereas in that one the PVW is applied to establish the Equivalent Nodal Forces to be used for the achievement of the equilibrium equations of all the nodes of the structure, in which these forces are obtained from the hypothesis that the stresses on all four sides of the elemental rectangle vary linearly along these sides and are thus to replace said stresses as statically equivalent, concentrated forces. ![]() In both of the traditional FEM and the proposed methodology in this article, the compatibility equations are obtained from the same interpolation functions, so the elementary matrix that relates deformations in the nodes of the element with the displacements of that nodes are the same in both procedures. ![]() In future, we suggest continuing conducting simulations and experimental tests to assess its performance. The proposed piston profile presents adequate results and behaviors. ![]() However, with the proposed piston, it was possible to reduce the effort and the material. Numerical simulations in the base piston and the new piston redesign proposal presented similar behaviors and results. Both models were evaluated and analyzed using the finite element method, where the most relevant physical conditions were temperature and pressure. Changes were applied to the profile of the piston head based on previous research and a new model was obtained. A commercial piston (base piston) was selected as a reference model to assess the piston head’s redesign. The methodology used was the mechanical engineering design process. The objective was to improve the combustion process and reduce polluting emissions using biodiesel blends as the fuel. In this study, the geometry of a piston head for a diesel engine was redesigned. However, technical problems must be solved, one of them is to improve the combustion process. Biofuels represent an energy option to mitigate polluting gases.
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