The Finite Element Analysis Of The Bus Framework And The Influence To The Fatigue Life By The Form Of The Joint Of The Bus Framework

In the thesis,The author take a bus as an example,On the basis of two-dimensional project drawings,The author firstly established a geometry model of the full scale bus skeleton utilizing ANSYS.by using beam4 element ,the finite element model for strength a analysis was setup and simplified.the FEM model also involves treatments lf boundary conditions,Simplified treatment of some skeleton parts and 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 unifoum velocity;One of the wheels hang in the air when the bus running on an uneven road;The bus brakessuddenly and the bus steers quickly.The calculation of strength of bus body's structure are expatiated.then the research calculates the free vibration modes of the bus skeleton.the calculating results proves that the finite element model established in the text is rational,The analysis is correct ,And the results could directly help to evaluate and improve the design of the passenger car.Research the rules of the fatigue life of the joint with the form of the joint changing.To provide the useful theoretical principle and gain practical experience for the physical safety design of the passenger train.it computed and analysed the fatigue life of the joint belong to the rear door of the passenger car.