Vibration analysis of a mobile military repair vehicle during movement

Military mobile repair vehicles are specialized vehicles capable of lifting, holding, and moving loads on complex terrain. The article presents a dynamic model of military mobile repair vehicles when holding and moving loads on road surfaces with random or harmonic profiles. The dynamic model considers the elastic deformation of tires, suspension systems, hoisting cables, and wind resistance acting on the loads during vehicle movement. This is a unique dynamic model due to the combination of crane and three-axle truck models. Lagrangian equations are applied to establish a system of differential equations describing the oscillations of the system and solve them using simulation methods in Matlab software. The results of the article indicate the displacements, velocities, and accelerations of all components in the system, particularly demonstrating the oscillation of the load when the vehicle moves on road surfaces with different profiles and velocities. The results of the article provide a basis for evaluating the process of holding and moving loads by military mobile repair vehicles across various terrains. The recommendation is to hold and move loads at a slow speed ranging from 2 m/s to 3 m/s. The findings also serve as input for proposing stable control solutions for the base vehicle and the load during movement.