Research On Kinetics Of The Tracked Vehicles And Weight Lightening For The Crawler Board

The crawler is related to the working performance of the walking device and the combat capability of the vehicle. The proportion of the crawler is large to the vehicle. If the weight of the crawler is too heavy, it will decrease the acceleration performance of the vehicle, increase the fuel consumption, and shorten the service life of the vehicle suspension device. The crawler board is the core part of the crawler, and its working environment is bad. It contacts with the road surface directly, subjected to torsion, bending and other forces. So it has higher quality requirements. Therefore, studying kinetics of the crawler and optimizing the structure of the crawler board to reduce the weight of the crawler, so as to improve and improve the overall performance of the crawler, is the problem that the engineering machinery industry needs to solve. It has a very important role in the development of the track. Weight loss is 3.189 kg, accounting for 7.9% of the total weight.Based on the theory of multi-body system dynamics, a virtual prototype of a military tracked vehicle is established, and the dynamic simulation and analysis of the whole machine under different conditions are carried out in the Mechanism Universal system. By studying the parameters such as the turning radius, the normal load, the dynamic tension when the vehicle turning on the slop, the variation of the main parameters is obtained. And the dynamic loads acting on the load wheel under various us working conditions are extracted. Then, the stress and strain distribution of the crawler board is obtained by the finite element method. The results show that the strength and stiffness are far satisfied with the requirement of use. So there is an allowance of light weight of the track board. Therefore, the topology optimization of the crawler board is carried out by using the topology optimization module of Workbench ANSYS. According to the results of topology optimization, as well as considering the adhesion capacity and the function of removing mud of the crawler board, the structure of crawler board is optimized, and the light weight model is obtained.Finally, in order to verify the influence of the lightweight design of the crawler board on its performance, the finite element analysis of the lightweight crawler board is carried out under different operating conditions. Through comparative analysis, it can be seen that the stress distribution of the lightweight crawler board is more uniform than the initial one, and the strength and stiffness of the crawler board meet the requirements. The feasibility of the lightweight scheme of the crawler board is verified by static analysis, which has some practical reference value for the design, production and application of the crawler board.