Optimization And Lightweight Designing Of Bus Body Structure Based On HYPERMESH And ANSYS

Nowadays, computer has become an important part of people’s life and work.Whether it is software or hardware, its performance has been greatly improvedcompared with a decade ago. On the basis of this series, computer-aided engineering(CAE) came into being. This advanced analytical method is skillfully used by modernengineers, and applied to various industries, including modern machinerymanufacturing industry. In the area of passenger bus body structure optimized design,China have a certain gap with the international advanced manufacturing countries,especially in the improvement of large and medium-sized passenger bus body structure.The way to catch up with the advanced manufacturing countries quickly is skilled inusing computer aided technology. This paper takes a certain type of bus as thetarget model, according to characteristics of the body bearer and the skeletal structure,optimize the structure of the body by systematic analysis to achieve the purpose ofreducing the body weight. A three-dimensional geometric model of the body isestablished by Pro/E software, and then the pre-processing work is done byHYPERMESH software. Finally, post-processing is done by ANSYS software.According to the materials of target models skeleton and the connections of multiplecomponents of the bus body, the meshing method and ways of loading on the modelbefore post-processing are selected, and a CAE model is established. In order to checkthe skeleton strength, the rigidity and to lightweight bus body, four typical workingconditions of the bus including vertical bending, emergency braking, emergencysteering and reversing to the limits are simulated, and finite element static analysis tothe body structure is done under the condition of setting load. Based on the theory ofstatic characteristic analysis and associated modal analysis for bus body, the vibrationmode and natural frequency of the bus skeleton in the free vibration state is obtained.Then the improved method for body skeleton of target model and the related processoptimization scheme are put forward.For the design of large and medium-sized passenger bus body, the final simulationresults provide a basis for judging the rationality of the strength, the stiffness of thebody skeleton, as well as the natural frequency and vibration mode when the bus isrunning. The body weight of target vehicle is further reduced by the improvements inthe technological process and the structure, and the expected purpose is achieved.