A kind of tractor safety cab integrated with roll over protective structure (ROPS) was designed. The exact three-dimensional model of the tractor cab was established, and the strength of the cab was analyzed by using non-linear finite element method. The cab was simulated by using beam and shell element. Rubber anti-vibration mountings fixed between the cab and front bracket of the tractor were simulated by spring element. The test was simulated by applying the longitudinal load, side load and crush load to the model according to same sequence OECD codes described. The analysis result showed that, at end of the test the cab generated a great deformation, the maximum stress in some part of beam and plate of the cab reached yield stress, and generated a plastic deformation, but it did not impinge upon the clearance zone, and the energy absorbed required by the OECD codes was met. During the first and second longitudinal loading test the maximum deformation was 0.111 m and 0.047 m, the clearance zone was not infringed. In loading from the side test the maximum deformation reached 0.168 m was found with an applied energy of 9478 J, and the safety zone placed farther than 0.4 m, was not reached. In the two crushing tests the maximum deformation was less than 0.02 m without impinging upon the clearance zone. The applied force at the end of the test, when the required energy absorption was met, was higher than 0.8 Fm the maximum force applied during the horizontal tests. Therefore, the analysis results provided a basis for designing tractor cab with ROPS which can pass the homologation tests established in OECD code 4.
Strength analysis of tractor safety cab
2009
6 Seiten, 6 Bilder, 16 Quellen
Conference paper
English
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