Computational Model of Conventional Engine Mounts for Commercial Vehicles: Validation and Application

Artikel i vetenskaplig tidskrift, 2011

In this paper, a computational model of conventional engine mounts for commercial vehicles comprising elastic, viscous and friction functional components, which expresses the nonlinear behaviour of the dynamic stiffness and damping of mounts as functions of both frequency and amplitude of excitation, is developed. Optimisation approach is implemented to identify model parameters using measurement data. The developed model has been validated against measurement data for harmonic excitations with a frequency range of 5–100 Hz and an amplitude range of 0.025–2mm employing three different engine mounts used in heavy trucks. The model shows good and admissible agreement with measurement data keeping the tolerance of estimation below 11%. Simulations of engine vibration dynamics are presented with both proposed model and commonly applied Kelvin–Voigt model of the mounts. The developed model can be used in complete vehicle advanced dynamic analyses and also in the design of semi-active and active engine mounting systems for commercial vehicles.