Rotordynamics analysis of a single helical gear transmission system for high speed applications

Najeeb Ullah; C. Xi; T. Cong; H. Yucheng

doi:10.15282/jmes.14.3.2020.06.0551

Authors

Najeeb Ullah The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China. Phone: +8613271956049
C. Xi The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China. Phone: +8613271956049
T. Cong The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China. Phone: +8613271956049
H. Yucheng The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China. Phone: +8613271956049

DOI:

https://doi.org/10.15282/jmes.14.3.2020.06.0551

Keywords:

Finite element method, gear transmission systems, stability analysis,, critical speed,, Transmission error

Abstract

Since the non-linear dynamic response under various high-speed conditions can directly affect the life of gear transmission systems. In addition, the transmission error and dynamic mesh force play a key role in noise and harshness analysis of gear bearing coupled systems. So, in this piece of work, a 12 degree of freedom dynamic model is developed to probe the vibration response by using finite element method and taking into account the bearing and flexible shafts in the first part. Subsequently, some meshing gear characteristics such as dynamic and vibration acceleration response under different rotational speeds (1000-9000 rev/minute) were analyzed whereas critical speed appeared at 6500 rev/minute. Then, the stability analysis is performed to investigate the dynamics behind the critical speed by using MASTA. It was observed that natural frequency of 0.45 kHz for a fourth harmonic order is analogous to critical speed which further causes sudden elevation in both dynamic mesh force and transmission error.

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