2134/22369 Eliot Motato Eliot Motato Ahmed Haris Ahmed Haris Stephanos Theodossiades Stephanos Theodossiades Mahdi Mohammadpour Mahdi Mohammadpour Homer Rahnejat Homer Rahnejat P. Kelly P. Kelly A.F. Vakakis A.F. Vakakis D.M. McFarland D.M. McFarland L.A. Bergman L.A. Bergman Targeted energy transfer and modal energy redistribution in automotive drivetrains Loughborough University 2016 Targeted energy transfer Nonlinear energy sink Automotive drivetrain Modal energy redistribution Mechanical Engineering not elsewhere classified 2016-09-07 13:21:06 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/Targeted_energy_transfer_and_modal_energy_redistribution_in_automotive_drivetrains/9577049 The new generations of compact high output power-to-weight ratio internal combustion engines generate broadband torsional oscillations, transmitted to lightly damped drivetrain systems. A novel approach to mitigate these untoward vibrations can be the use of nonlinear absorbers. These act as Nonlinear Energy Sinks (NESs). The NES is coupled to the primary (drivetrain) structure, inducing passive irreversible targeted energy transfer (TET) from the drivetrain system to the NES. During this process, the vibration energy is directed from the lower-frequency modes of the structure to the higher ones. Thereafter, vibrations can be either dissipated through structural damping or consumed by the NES. This paper uses a lumped parameter model of an automotive driveline to simulate the effect of TET and the assumed modal energy redistribution. Significant redistribution of vibratory energy is observed through TET. Furthermore, the integrated optimization process highlights the most effective configuration and parametric evaluation for use of NES.