Strength And Stiffness Analysis Of The Body Structure And Articulated Device On The All-terrain Articulated Tracked Carrier

All-terrain Articulated Tracked Carrier is a versatile vehicle which can mainly transport troops and materials, for its first Carrier development is retrospected to amphibious all-terrain vehicles. There are two kinds of all-terrain vehicles, Crawler vehicles gradually become a leading place in civil and military biservice products for its better rough terrain adaptation and better complex environment performance. The double-tracked all-terrain articulated tracked carrier with articulated device has better passing capacity than the single-tracked all-terrain vehicles for which is not easy to slide in adverse terrain.All-terrain articulated tracked carrier in foreign begin to develop in many years ago, these products mainly manufactured in Northern Europe, Russia and Singapore. Our country begins to manufacture by imported BV206 models which is coming from Sweden, but it didn't formatted batch process instead of singer producing. this all-terrain articulated tracked carrier is designed can effectively finish much more tasks in some fields, After batch processing, this product will be used in the national defense and civil department widely.The off-road working conditions of All-terrain articulated tracked carrier is extremely complex, and body is the main bearing structure for cargo weight and it's own weigh, together with other ancillary equipment above it. Articulated steering and pitching device is the middle part that connects with the front and rear body of All-terrain Articulated Tracked Carrier, which can realize the movements on the horizontal, vertical and torsional plane. Body strength and stiffness can play an important part in the carrier Life and reliability.The structure of body and articulated device is very complex, and the theoretical formula calculated method can not meet the requirements of overall structure analysis. This paper combined with the designed of enterprise vehicle, and according to the overall design requirement of vehicle structure to establish the three-dimensional entity model and finite element model of body and articulated device. According to working principle of the carriers in the typical working conditions just as in the straight road, on the hillside, concave slope, convex slope, vertical lower wall, longer ditch and so on. The engineering analysis software ANSYS is used to apply constraints and loads for the finite element model under different working conditions, after calculating to analyse the strength and stiffness of body and articulated device, and to research the ability of resistance the fracture destruction and deformation. Based on the analysis of all working conditions proposed meaasures for improving the structure for the large deformation and big stress parts, then built the modifyed model to calculate the finite element model again, and to analyse the measures rationality.Optimization design technique of the ANSYS software is used for optimization of the front and rear body structure. Plate thickness is applied as the designed parameters, plate deformation and stress is applied as the constraint function and body total mass as the objective function. The primary target of optimization design is mainly to find the optimal size sequence which is the most economical and efficient design program feasibility enough to meet all the requirements defined by constraints. The object is to reduce body total mass, reduce crawler ground pressure, reduce manufacturing costs and using costs, reduce fuel allowance while working, improve the carrier economy, ensure the economy of the design.Weight reduction can also reduce track wear and increase track life expectancy, thereby enhances the life of the carrier.The idea and method of analysis, different model connection method and constraints and loads applying methods are all ensured the finite element result validity. The analysis is based on the relevant finite element theory and mechanical theory, and the result is confirmed with the actual situation and by manufacturers. The calculation result provides some technical methods and reliable reality applications.