Acta Univ. Agric. Silvic. Mendelianae Brun. 2017, 65(2), 419-428 | DOI: 10.11118/actaun201765020419

Simulation of Failure in Gearbox Using MSC.Adams

Jan Furch, Trung Tin Nguyen
Department of Combat and Special Vehicles, Faculty of Military Technology, University of Defence, Kounicova 65, 662 10 Brno, Czech Republic

Vehicle's gearbox is regarded as one of the most crucial elements in a vehicle but it sustains a variety of faults such as a broken tooth, misalignment, imbalance, looseness, and even a broken case. Using accelerometers, which are mounted on the case to measure a vibration signal, we can detect faults and monitor the condition but the signals are often complicated and difficult to interpret. Moreover, it is costly and almost impossible to change the structure of a gearbox in order to survey, for instance, the dependence of a vibration signal on the structure, or types of a fault. In this paper a dynamic model of gearbox was developed with tooth breakage to study the capability of simulation using MSC.Adams software. In this simulation we focus on the gearbox used in a common military vehicle. The simulation was based on a nonlinear contact force to predict what happens to the gearbox in case the tooth breaks.
The contact mechanics model of the meshing teeth is studied thoroughly by selecting contact simulation parameters such as stiffness, force exponent, damping and friction coefficients. To simulate the real working environment of the gearbox, simulated bearings were also built in the MSC.Adams. The paper shows that it is possible to simulate vibration signals by the gearbox model created in 3D CAD software and analyze the results in the multi-body dynamics software MSC.Adams.

Keywords: gearbox, cracked tooth, simulation, model, vibration signal, contact force, MSC.Adams
Grants and funding:

The presented work has been prepared with the support of the Ministry of Defence of the Czech Republic, Partial Project for Institutional Development and Specific Research, Department of Combat and Special Vehicles, University of Defence, Brno.

Prepublished online: April 30, 2017; Published: May 1, 2017  Show citation

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Furch, J., & Tin Nguyen, T. (2017). Simulation of Failure in Gearbox Using MSC.Adams. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 65(2), 419-428. doi: 10.11118/actaun201765020419
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