Evaluation of Methods to Calculate Dynamic Load Coefficients

Raudel Flores Moreno, Gilberto de Jesús López Canteñs, Arturo Martínez Rodríguez, Eugenio Romantchik Kriuchkova, Geisy Hernández Cuello

Abstract

Dynamic forces and impact loads usually act on agricultural machines, causing breakages or failures. That is due to the nature of the impact loads, which are of short duration and decrease the capacity of the material of absorbing the deformation energy. The calculation methods that allow obtaining dynamic load coefficients require complex operations. In the present investigation, three methodologies for obtaining dynamic load coefficients were evaluated and compared: analytical method (MA), numerical simulation by the finite element method (MEF) and experimental method (Mexp). The coefficients of dynamic loads obtained from the MEF reached a relative difference that oscillated between 3.479 and 5.112%, based on the experimental results. For the analytical method, comparedto the experimental results, a relative difference between 21.820 and 27.201% was reached, which is higher than that obtained by the numerical simulation method.

Keywords

elements; dynamic efforts; Impact loads; border conditions

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