Analysis And Optimization Of A Bus Body Frame Fracture

Natural gas is a clean energy and environmental quality, Compared withthe gas and steam passenger car diesel pollutant emissions greatly reduced, whichcan effectively reduce the damage to the automobile exhaust to the environment.Natural gas bus also has the advantage of saving energy and reducingconsumption. By running test comparing each enterprise vehiclestatistics, compared with diesel, gasoline, the comprehensive economic benefits ofnatural gas vehicles can save about25%-40%.In recent years, China’s sustained and rapid economic development, the sharpexpansion of city population, a spurt of development of privatecars, causing every China city are guilty of "blocking", vehicle exhaust emissionson the atmosphere pollution and played. City public transport system hasbecome a vital ring ease city traffic woes. In the promotion of city bus prioritypolicy, bus rapid growing demand, provide a favorable external environment forthe development of passenger car manufacturers. With natural gasbus comparative advantage will bear more public travel traffic pressure.Because the city transit condition is complex, serious overload, this set ahigher request to the bus body frame. The bus body skeleton is an important keyparts of the vehicle, the vehicle bus running life and directly influences thestructure form and strength of economic security and comfort. If the design ofwhole structure is not reasonable, there is some market bus operation. Forexample，a city bus， a part in supporting framework fractured and the topframework of installing CNG cylinder fractured. This topic will appear in themarket of the bus frame fracture problems,according to the original bus bodyframe structure, the finite element method is adopted to establish the body framefinite element model. In a bus carrying case, analysis of skeleton curve, left andright side frame respectively dangling, emergency braking and other body frame strength under different working conditions, comparing the calculated results andthe actual body fracture condition, find out the body frame fracture reasons. Inview of the body frame fracture reason, skeleton structure for structuraloptimization to improve on is easy to break，and across the strength of thelightweight design area. Finally, on the optimized structure strength analysis,found the subsequent improvement optimization market problems, to avoid thesame problem recurring.