Forestry Fire Patrol And Fighting All Terrain Vehicle Dynamic Performance Research Based On FVP Technology

Traditional design process includes prototype manufacture, test evaluation and feedback design. Every circulation process is accompanied with physics prototype's establishment or modification, and then brings out longer developing period and higher cost. While using virtual technology for products development, and realize whole process digitally could avoid establishing physic models, shortening period, reducing cost, enhancing design quality, and improve service ability for customer and market demand.Taking a forestry fire patrol and fighting omni-terrain vehicle as prototype, this thesis adopted virtual prototype technology to establish multi-body dynamic model. Then this thesis simulated ride comfort, braking performance, terrain trafficability, and analyzed simulation results, found out main factors for those abilities, and put forward modification methods.Firstly, according to the vehicle construction, this thesis established geometry model and carried out virtual assembling under Solid-works, and got the whole three-dimension model. Then leading this model into ADAMS, according to relationship between parts, this thesis established whole multi-body dynamic model. Secondly, tires of both sides same direction jumping virtual experiment was also carried out in Adams/car, and Adams/Insight was used for optimization of front suspension. Thirdly, on the basis of model and ADMAS environment, random road and impulse road input ride comfort was also simulated in this thesis, and this thesis discussed character curve, then realized the aim about whole vehicle dynamic characteristics. Then, through experiments, situation and performance on various roads were also presented.At last, combining with factual vehicle experiment standards, in various environment ways, large time-domain and frequency-domain response calculation and simulation about vehicle's ride comfort, braking performance and terrain trafficability were carried out, then this thesis analyzed and evaluated the results referring to real vehicle's experiment standards. Vehicle experiments were completed on the forestry patrol and fighting omni-terrain vehicle to test its ride comfort, braking performance and terrain trafficability according to vehicle experiment standards, and these experiments were further contrasted with virtual simulation. The results show that real data is accordance with the virtual data, which provides important theoretical reference for evaluation, improvement and optimization of the same type vehicles. The simulations provide more scientific methods for whole vehicle's design and development, solve some kinematics and dynamic problems, and promote design level, shortens development period, reduce cost, and provide good references for promoting the home-made forestry fire patrol and fighting vehicle's design level.