Effect of the gear local damage and profile error of the gear on the drivetrain dynamic response

Abstract

The dynamic modeling of vibration of a drivetrain is used for increasing our information about vibration generating mechanisms, especially in the presence of some kind of gear faults. This paper describes a research work on the automotive driveline modeling, vibration analysis, and the effect of gear defects on the dynamic behavior of the system. Firstly, main drivetrain components including the engine, clutch, single stage spur gearbox and disc brake are modeled, respectively. The nonlinear dynamic model is simulated by a thirteen degrees of freedom (DOF) system and the nonlinear function is due to the dry friction path. Secondly, two types of defects are modeled and introduced into the spur gear system; local damage and profile error. Then, the nonlinear equations of motion are solved by the numerical Runge Kutta method and a comparative study of the dynamic behavior of the system in healthy and defected cases is discussed for each fault type. The influence of the defects on the vibration response is presented in the time and frequency domain. Finally, analysis of the two defects together is presented.

The effect of a cracked tooth on the dynamic response of a simple gearbox with a flexible coupling under acyclism operation

“…Gear transmission can be integrated in a drive train with the engine, clutch and disc brake. Ghorbel et al (2018) proposed a dynamic model of the drive train taking into account nonlinear dry friction of the clutch. They supposed that the speed and the load of the engine were stationary and they studied effects of tooth defects (tooth local fault and tooth profile error) on the dynamic response in time and frequency domains.…”