Static Characteristic Research On Coach-Body Frame

As more and more coachs being used, the energy conservation and reduce consumption of coach becomes the new question which various coach manufacturer must solve, the lightweight of the coach body proposed on this also receives people's attention day by day. Because the coach body uses the structure of steel frame mostly, the structure and the stress situation are complex, so the problem to the travel usually solved by partial enhancement, this causes the vehicle's weight becomes more bigger. The material or the change of structural which regarding should certain reduce the component does not dare to decide in the design, because there is no explicitly accordings, as this continues, the weight of vehicle enlarge, and the new structural wouldn't turn out.The machinery, automobile and other has yielded great achievements as computer technology's application as well as the FEM which caused the CAE technology widely applied maturely. Therefore the coach body structure can be analysised through the model's establishment by useing finite element theory and finite element analysis software, and the lightweight of the coach body according to the theoretical analysis result to the coach body can be carried on,this has become an important method.This article studies on the ground of domestic and foreign correlation research foundation, carries on the precise parametrization modelling to some entire-bearing coach body frame, and the static stress analysis research being conducted, then the comparative analysis with the static test result has been carried on, confirmed the finite element model's accuracy. On this foundation the dynamic experimental analysis to the coach carried on, the test result indicated the coach body's frame has the space existence for further optimizatiom, and the basis and reference for the lightweight has been provided. Then carry on the stiffness sensitivity analysis to the confirmed coach body finite element model, and take out the important parameters to carry on the optimization, on the union of correlation research and experience of work, proposes the structure lightweight plan. According to this plan, the body frame reduces 273kg altogether, through the CAE analysis as well as the static dynamic experiment to the improved coach indicate that after lightweight the body's rigidity and stress satisfied the request.