Comparative analysis of the options for strengthening the cockpit of the D2 class buggy according to the technical regulations of the competition

The article presents a comparative analysis of various options for strengthening the cockpit of a typical frame of the D2 class buggy for the twisting mode around the longitudinal axis. Criteria for assessing options are hard - weighted indicators. The spatial frame of the buggy is exposed to a variety of loads and their combinations. The impact of external forces causes a complex-stressed state in the carrier system, characterized by both simultaneous and alternate effects of bending and twisting forces. All this can lead to such deformations and displacements of the frame elements, that the assemblies and units fixed on it can experience various malfunctions in work, and even completely fail (the steering rack mounted on the frame is very sensitive to deformations, the differentials in their attachment points to frame due to its deformations can be damaged, as well as gas tank fasteners, and the driver's seat, etc.). Thus, it becomes obvious the importance of giving the frame of the buggy the necessary rigidity to resist operational loads. In addition, the lack of rigidity leads to increased stresses in the frame under different loading conditions. It is needed not to forget about the characteristics of controllability, which is directly influenced by the geometric stability of the carrier system. All this proves the importance of ensuring the rigidity of the buggy carrier system. In addition to a comparative analysis of cockpit enhancement options, a number of practical recommendations for the considered options will also be given. According to the results of a comparative analysis of options, it is possible to establish the dominant role of strengthening the cockpit roof as an option that provides not only the highest torsional rigidity, but also the lowest weight. All options are consistent with the requirements of the technical regulations of the competition (Appendix J, Article 253).

buggy, frame, carrier system, torsional stiffness, specific stiffness