Study on the terrain response of armored rescue vehicle

Many countries with underdeveloped economies tend to improve military vehicles to enhance their effectiveness by integrating additional equipment into existing vehicles. Armored personnel carriers can be integrated with crane systems and cables to function as cranes for rescue and recovery operations on the battlefield. This paper proposes a dynamic model for a military armored recovery vehicle moving on randomly rough roads in a suspended payload state. The randomly rough roads of classes D, E, and F, as described in the ISO 8068 standard, are considered as factors influencing the vibration of the vehicle during movement. The research model is a 2D multi-body system, considering the elasticity of the tires, suspension system, and cables, while neglecting the elastic slope of the ground. The system's motion differential equations are solved through simulations using Matlab/Simulink software. The results indicate the displacement of the vehicle chassis and the oscillation of the payload corresponding to speeds of 1 m/s, 1.5 m/s, and 2 m/s. The payload's tilt angle can reach nearly 40° when the vehicle moves at a speed of 2 m/s on a type F road, corresponding to a travel distance of about 30 meters. Meanwhile, the maximum tilt angle is about 19° when the vehicle moves at the same speed on a type D road. The chassis, boom, and payload experience stronger oscillations when the vehicle moves faster and on rougher terrain. The paper recommends practical engineering solutions to minimize load oscillations during vehicle movement. The findings of this paper provide a basis for evaluating the operational capability of an armored personnel carrier integrated with a crane, contributing additional theoretical insights into machine dynamics and holding significant importance in the military field