It is here proposed a methodology for simulation of ROPS tests (ROPS = Roll Over Protective Structure) of agricultural tractor cabins. The work is based on the resolution of this problem through the use of the finite element method. In order to limit the number of nodes of the model and thus to speed up the resolution, a two dimensional finite elements model has been chosen. The method presented here solves with relative ease, even very complex structures. There are also simplest methods in literature where specially made software is based on the finite element method for simulating approval tests on ROPS structures. In this case,codes developed just for this purposeare available, and therefore very simple to use and characterized by a high speed of preparation of the model following the definition of a small number of parameters. On the other side these are codes designed for structures having a specific geometric shape and in which the user is not free to set all the parameters existing in commercial software for the structural calculation, and are not very suitable in case of complex or not conventional structures. The methodology proposed by the authors instead, although not automated, allows simulating any type of structure in acceptable times. The results were validated by full scale experimental tests. Through the interpretation of the results it is possible to identify which areais the most critical for the structure and evaluate any change, something which is not easy to do through expensive tests.
Development of a model for the simulation of ROPS Tests on agricultural tractors cabin: numerical models and experimental verification
BARAGETTI, Sergio;ROTA, Fabio
2015-01-01
Abstract
It is here proposed a methodology for simulation of ROPS tests (ROPS = Roll Over Protective Structure) of agricultural tractor cabins. The work is based on the resolution of this problem through the use of the finite element method. In order to limit the number of nodes of the model and thus to speed up the resolution, a two dimensional finite elements model has been chosen. The method presented here solves with relative ease, even very complex structures. There are also simplest methods in literature where specially made software is based on the finite element method for simulating approval tests on ROPS structures. In this case,codes developed just for this purposeare available, and therefore very simple to use and characterized by a high speed of preparation of the model following the definition of a small number of parameters. On the other side these are codes designed for structures having a specific geometric shape and in which the user is not free to set all the parameters existing in commercial software for the structural calculation, and are not very suitable in case of complex or not conventional structures. The methodology proposed by the authors instead, although not automated, allows simulating any type of structure in acceptable times. The results were validated by full scale experimental tests. Through the interpretation of the results it is possible to identify which areais the most critical for the structure and evaluate any change, something which is not easy to do through expensive tests.File | Dimensione del file | Formato | |
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