The Finite Elements Analysis And The Research Of Lightweight Optimization Design For A Heavy. Duty Truck’s Frame

The paper, taking a heavy truck double.layer.beam frame as the research object,calculate and analyze the intensity and stiffness of the truck frame, modeling with the shellelements, also the modal analysis. The working conditions are as follow: When the truck isfull load—the lateral twisting; the front twisting; the rear twisting. When the truck is atoverloaded condition—the bending, the front twisting, the rear twisting.The results.based model parameters based on the static structure of the frame, using the"subtraction principle" will double the frame structure for structural improvements tosingle.board structure and strengthen the local structure suspension area. After determiningthe initial program, finite element analysis of their limit conditions, compared to the originalprogram structure, the various parameters to meet the requirements, the use of Isightsoftware were focused beam size optimization and layout optimization, to get the finaloptimization program to improve the program, the final contrast optimization finite elementanalysis, both to meet the requirements to achieve the target weight.Final optimized single.beam frame chassis base model than the original program, thequality is reduced by about10%; reduce overall stress level frame, reducing structuralweaknesses of local stress concentration level, the stress distribution is more uniform, which,before twisting and overload after the overload condition maximum torsional stress, althoughslightly elevated, but are within safe limits; first order bending mode of a reverse.ordermodes are improved. The structural parameters were developed to meet the requirements ofthe project improved, optimized and improved product accumulated experience indevelopment, improve the product development process optimization modifications, not thesubsequent product design reference.