Optimization of vehicle transmission shaft modal parameters based on finite element method

ZHAO Sheng-lian, TANG Xiong, ZHANG Jian
(Transportation and Automotive Engineering Institute, Panzhihua University, Panzhihua 617000, China)

Abstract: Aiming at the problem of external excitation resonance of automobile drive shaft, and the 3D software CATIA was used to build the automobile transmission shaft model. The automobile transmission shaft was imported into the finite element analysis software ANSYS.and the first 6-order non-rigid free-mode parameters of the main drive shaft and the intermediate drive shaft in the free mode and the drive shaft assembly in the constrained mode were studied. The mathematical models were established and summarized for the variation of modal parameters corresponding to different shaft tube lengths and wall thicknesses of the drive shaft.A method based on finite element technology for modal parameter optimization of automobile transmission shaft was proposed, and the optimized model was tested by finite element software ANSYS.The results show that reducing the shaft tube wall thickness by 1 mm can increase the natural frequency of the first order of the transmission shaft assembly from 132.82 hz to 138.49 Hz, which meets the requirement of avoiding resonance.
Key words: ANSYS; finite element; modal; automobile drive shaft; optimization