Dynamics Simulation And Structure Optimization Of120Ton Platform Vehicle

Abstract:Heavy-duty platform vehicle is the key transport equipment of steel mills,playing an important role in the transport process.PT120heavy-duty platform vehicle studied in this paper was used in the Anshan steel, Baoshan steel and other companies, the research has important practical significance.As the heavy-duty platform vehicle has a big load capacity, the stability of its suspension system,the cooperativity of its steering system,the force of its critical component are all have a high requirement.The V thrust rod break and some tires wear when the vehicle work, to make its structure more reasonable and ransport process more secure, stable and efficient, in-depth research and force analysis on the key components of this kind of heavy-duty platform vehicle are necessary.Based on this background, the main results and conclusions are as following:1. The accuraty of a tire model is crucial for the success or failure of the whole vechicle.So, the tire model is deeply studied first.Then, by using ADAMS software which based on multi-rigid-body dynamics theory, the multi-rigid-body dynamics model of Heavy-duty platform vehicle was built in the paper.2. By using ADAMS software, the suspension system and steering system of the vechicle were built, by solving the interface method between ADAMS and AMEsim software, the co-simulation model of the mechanical-hydraulic combined system for the heavy-duty platform vehicle had been set up.3. The co-simulations of flat road driving, climbing10%slope, pivot steering were completed. Then the vehicle’s climbing ability, steering qualities, driving smoothness, kinematics and dynamics parameters were obtained.The co-simulation results show that the co-simulation model and simulation methods in the paper are right, the results can provide reference for the vehicle’s structure optimization.4. According to existing defect of the steering system, by using ADAMS parametric simulation technology, structural optimization of the existing vehicle steering system was carried out. Optimization results show that the steer center after optimization was closer to the center line which has the equal distance with front and back drive wheels.5. Main performance tests under several working conditions were carried out by using PT120heavy-duty platform vehicle. The minimum turning radius test, the full load vehicle top speed test were carried out.The test results show that the main performances all meet the initial design requirements, and is consistent with the simulation results, the results verify the correctness of the modeling of the vehicle dynamics.