Motato E, Haris A, Theodossiades S, Mohammadpour M, Rahnejat H, Kelly P, Vakakis A F, McFarland D M, Bergman L A
Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU UK.
Ford Werke GmbH, Cologne, Germany.
Nonlinear Dyn. 2017;87(1):169-190. doi: 10.1007/s11071-016-3034-4. Epub 2016 Sep 2.
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.
新一代紧凑的高功率重量比内燃机产生宽带扭转振荡，并传递到轻阻尼传动系统。减轻这些不良振动的一种新方法是使用非线性减振器。这些减振器作为非线性能量阱（NESs）。NES与主要（传动系统）结构耦合，诱导从传动系统到NES的被动不可逆靶向能量转移（TET）。在此过程中，振动能量从结构的低频模式导向高频模式。此后，振动可以通过结构阻尼消散，或者被NES消耗。本文使用汽车传动系统的集总参数模型来模拟TET的效果以及假定的模态能量重新分布。通过TET观察到振动能量的显著重新分布。此外，综合优化过程突出了使用NES的最有效配置和参数评估。
