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As China's economic and social development, the car with an increasingly important role to play in our daily lives, has become the people's lives, an integral part of work, the automotive industry has also become a pillar of the country's economic development industries. In China, a large population, while the economic existence of the problem of uneven regional development, the cyclical nature of the labor force migration has been an important issues related to people's livelihood. Passenger road transport as the main tool plays an irreplaceable role in this regard. Therefore, the technical level of the bus industry will largely affect the overall development of China's economy, Bus Body Frame structure design technology as a core technology in the bus industry is particularly important. At present, China's passenger car body frame structure design, thumb or analog design phenomenon also abound. This will inevitably lead to the structural strength of the excess or lack of strength. Strength excess, brought structure silly Big Ben the coarse and materials, energy waste; insufficient strength will cause early failure of the structure and even cause accidents. And analyzed and processed in the structure of problems, they often use the local reinforcement approach, causing vehicle coordination poor, increasing vehicle weight. Therefore, the analysis and calculation of the bus body structure, establish a reasonable structure, guarantee to meet under the premise of the strength and rigidity of the vehicle structure, and thus to optimize the existing structure, to achieve the purpose of weight reduction has important practical significance. Start from the comparative analysis of three different forms of the bus body skeleton structure, the use of finite element techniques, static and dynamic finite element analysis of the design of a passenger Guilin Bus Company. In the finite element model is established by means of powerful Finite Element HyperMesh pre-processing software to establish the finite element model of the body frame; according to the design requirements and the specific configuration of the engine, gearbox, fuel tank, and passengers, seats, luggage compartment The load is added to the model, etc.; actual passenger road conditions that may be encountered in the process of scientific analysis to determine the condition of finite element analysis, and ultimately closer to the actual situation of forced displacement analog reverse the condition. Actual structural characteristics of the vehicle and the actual usage of the entire modeling process, fully integrated, and strive to do finite element model can accurately reflect the actual situation of the vehicle. Finally, the calculation results, and exposed the intensity of the problem, the targeted improvements in design, calculate and verify the effectiveness of the improvement program. Calculated not only to solve a specific design problem, while perfecting the design database, help to accelerate the development of new models, and further improve product performance and technical content.
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