Modal Study On The Cab Body In White Of A Heavy Truck

In this thesis, I describe the trends of the high-end heavy truck i.e. the technicallevel improved in the economy, power, safety, comfort and reliability. And thus leadsto the development trend of the cab, i.e. more safety and comfort, and comfort aredescribed. As the performance of the cab-comfort that has been more and moreattention in the product development phase. In order to get the best performance of theproduct cab, in the product development stage, it is necessary to use the finite elementmethod simulation modal analysis during the cab designing and the experimentalmodal analysis in the post-sample stage. And get the plan of the product improvedthrough the analyzing of finite element simulation and experimental modal analysis.First, the finite element model will be established through simplifying, modifyingand sewing treatments and definition of material, meshing of the cab body in white(BIW) model. The results of analysis will be got by the computing of the solver andusing post-processing software for modal analysis. According to the modal analysis,the improvement program of cab BIW proposed, and then re-establishes the finiteelement model and does the finite element modal analysis. Comparing with the resultsof the before and after analysis, will be got the feasibility of improving the program.Next we make the experimental modal analysis of the improved cab BIW. There is aneed for experimental modal analysis of the cab BIW because of the complex structuralof cab and defining the boundary conditions and simplifying mechanical model.Collecting the data and analyzing the results of modal analysis of each stage that gotusing the equipment and software for the cab BIW, and comparing with the results ofexperimental modal analysis and finite element modal analysis.In the thesis, we will get the method by studying of design mechanism of the cabi.e. using the finite element modal analysis in the early designing and using theexperimental modal analysis in the latter sample stage then providing a good way forthe designing and verification of the cab.