Research Of Automotive Propeller Shaft Vibration Based On Virtual Prototype Technology

As the important part of automobile transmission system, the propeller shaft cantransfer speed and torque during the process of automobile driving. Because of theexisting of additional torque comes from universal joints, low stiffness and frequencydue to its structure characteristics, propeller shaft will cause vibrations at work.Research on vibration of propeller shaft is of great significance to solve the problem ofvehicle comfort and performance. Traditional design method of propeller shaft becauseof its long cycle, low efficiency, low accuracy and other shortcomings have been unableto meet the market demands, and modern design method can not only ensures having amore reasonable design for parts, but also can shorten the product development cycle,reduce the cost, improve propeller shaft quality and market competitiveness.In this paper, we select an SUV propeller shaft as the object of study, and researchthe influence factors of modal parameters and vibration. At last, make an optimizeddesign for the key components of propeller shaft assembly. The main content of thispaper is as follows:①Making a modal analysis for single propeller shaft. The entity model of propellershaft is build by CATIA which is3D modeling software, then put it into the finiteelement software hypermesh to mesh the propeller shaft entity model and create thefinite element model. The results which come from finite element analysis in hypermesh,compare with the experimental results to affirm the finite element model is correct.②Researching the influence factors of modal parameters. With theVariable-controlling approach, this part will study how the length and thickness of thepropeller shaft influent its first order natural frequency, and build their fitting functionsto provide theoretical basis for the design of propeller shaft.③Vibration analysis of propeller shaft assembly. The rigid-flexible couplingvirtual prototype model of the propeller shaft is built and checked in simulationsoftware ADAMS, then make Natural frequency analysis for propeller shaft system, at laststudy how the speed and torque influent its vibration.④Studying how the middle support effect the vibration of propeller shaft assembly.With the inputs of stiffness and damping of middle support and outputs of the maximumdisplacement and maximum stress response, here will study the influence of the supportstiffness and damping to the propeller shaft vibration in order to provide a theoretical basis for improved design of middle support.⑤Making an optimized design for middle support. With the design variables ofstiffness and damping and design objectives of acceleration, this part will make anoptimized design for the parameter of middle support.