Spectral evaluation of vibration loadslight military vehicle

Abstract

An analysis of the conditions for the use of light military vehicles during hostilities was carried out. Taking into account the intensity of use of military vehicles at the front, in particular the increase in operating speeds and the operation of samples at the limit of their technical capabilities in off-road conditions and with the aim of reducing vibration loads on the driver, crew, structural elements of the military vehicle and cargo, it is proposed as an option to get out of the situation on modern samples use long-travel suspensions. Based on the analysis of previously conducted studies, the frequency limits of the sensitivity of the human body in the vertical and horizontal directions have been established. A simulation model of suspension operation in off-road conditions was developed to evaluate the smoothness of movement of the “Mamai” light military vehicle and the spectral evaluation of vibration loads on the driver and crew. In the future, the vibration load on the driver was determined, and after comparing them with the results of the conducted experimental study, the comparability of the results and the adequacy of the simulation model were assessed. The difference in the amplitudes of vertical accelerations at the driver’s workplace during the experiment and computer simulation did not exceed 12-15%. To compare experimental data and data obtained through simulation modelling with regulated standards, sanitary norms and values. with the means of the Matlab mathematical processor, the rms values of the vibration accelerations in the octave bands were directly determined, for which a corresponding program was developed, since the built-in poctave function of the Matlab environment does not allow the analysis for frequencies below 3 Hz