The Finite Element Of Analysis Of Integrated Coach Body Based On ANSYS

A skeleton of a bus body is one of the most important components.It is vital for us to apply the finite element technique to analyze the static&dynamic characteristics and to evaluate the vibration characteristic.It is easy to know the possible stress and distortion of the bus body and to recognize the inherence vibration model in body designing through the finite element analysis. Furthermore,it would bring us dramatic effect in many aspects, especially in optimizing bus structure, improving body performance, shortening the cycle and reducing the cost of developing new models.In this paper, taking a domestic bus for example. Firstly established a geometry model of the full scale bus skeleton utilizing ANSYS11.0 on the basis of two-dimensional CAD project drawings. By using beam element, the finite element model for calculation was setup through the reasonable simplified. The FEA model not only involves treatments of boundary conditions, simplified treatment of some skeleton parts,but also deals with the fixed weight and loading that is put on the structure. Considering four typical operation situation, such as the bus running with the uniform velocity; one of the wheels hang in the air when the bus running on an uneven road; the bus brakes suddenly and the bus steers quickly. The calculation of statics analysis of bus body's structure is expatiated. Also,we can know the strength, stress and distortion of the bus body.In order to analyse the dynamic characteristic of the body structure,the ten orders natural frequencies had been calculated and had got the body inherent frequency and the corresponding vibration model. To improve the strength and performance of the body structure,we combine the result of analysis to improve the local structure of the bus and then apply the finite element analysis once again toverify its scientific rationality.The calculating results prove that the finite element model established in the paper is rational, the analysis is correct, and the results could directly help to optimize and improve the design of the body structure.