Abstract
In this paper, the feasibility of the application of a dual mass flywheel (DMF) for heavy-duty truck drivetrain systems was studied. The third engine order vibration harmonic was in the focus of analysis as one of the most significant contributions to the oscillatory response in the drivetrain systems of heavy-duty trucks. Global sensitivity analysis (GSA) and Pareto optimization were used for designing torsional vibration absorbers in an operating engine speed range of 600–2000 rpm. The optimization method attempted both to minimize the oscillations of the torque at the transmission input shaft and to maximize the energy efficiency of the vibration absorber. The GSA enabled the appropriate scanning of the domain of design parameters by varying all the parameters at the same time. It provided deep insight into the design process and increased the computational efficiency of the optimization. The results obtained show the following: the solution of the bi-objective optimization problem for torsional vibration absorbers does exist; Pareto fronts were obtained and analyzed for the DMF, presenting a trade-off between the measure of the attenuation of the oscillations of the torque at the transmission input shaft and the measure of the energy efficiency of the absorber; the optimized mass inertia, stiffness and damping parameters of a DMF do exist, providing the best attenuation of the torque oscillations; the performance of a DMF was further enhanced by incorporating a torsional tuned mass damper with appropriate optimized parameters. Finally, the results show evidence of the feasibility of the application of dual mass flywheels in heavy-duty truck drivetrain systems.
Highlights
Ground vehicles and many other engineering systems comprise of drivetrains as their important subsystems
Two concepts of vibration absorbers were studied with the aim of analyzing the feasibility of their application in heavy-duty truck drivetrain systems: a dual mass flywheel (DMF) and a DMF with a torsional tuned mass damper
The standard deviation, peak-to-peak and the integrals of the standard deviations of the torques calculated along the engine speed interval 600 rpm ≤ ne ≤ 2000 rpm, were used for estimating the vibration attenuation and the energy efficiency of the torsional vibration absorbers
Summary
Ground vehicles and many other engineering systems comprise of drivetrains as their important subsystems. The automotive industry drives development towards down-sized and down-speeded engines and higher cylinder pressures. This requires advancing the available solutions for noise and vibration attenuation, making the design of efficient torsional vibration absorbers for drivetrain systems of ground vehicles a very important and challenging problem. The research is ongoing to understand if this concept of the vibration absorber is suitable for the attenuation of torsional vibrations in the drivetrain systems of heavy-duty trucks [9,10,20,21,22]
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