The modeling and analysis of vibration response with airdrop vehicle in landing process

The airdrop transport of vehicle is an important way to transport people and goods quickly. In order to reduce the damage to the vehicle and the people at the landing instant, it is necessary to model and analyze the airdrop vehicle in landing process. This paper is first time to develop a 10-degree-of-freedom dynamics model for this process by using Kane’s method. By analyzing the partial velocities, partial angular velocities, active forces and inertia forces of the vehicle system with the Cardan angle conversion during the landing process, the Kane multibody dynamics equations of airdrop vehicle are obtained. The results show that the solutions of Kane’s method are consistent with that of the experiment and finite element simulation, simplify the simulation process. The equations derived by Kane’s method can express the acceleration changes of vehicle and people on the seat in the landing process of airdrop vehicle. The excitation from compressions of suspension and wheels is the main reason of vehicle vibration. When the suspension is compressed to reach the limit displacement, the suspension impact on the vehicle body will lead to greater acceleration. It also analyzes the influencing factors about the vibration response and proposes suggestions to reduce the vibration before airdrop.