Mm. Haque et al., SIMULATION OF DISPLACEMENT SENSITIVE NONLINEAR DAMPERS VIA INTEGRAL FORMULATION OF DAMPING FORCE CHARACTERIZATION, Journal of sound and vibration, 187(1), 1995, pp. 95-109
An integral formulation approach for the characterization of a displac
ement sensitive non-linear damping force is proposed. This method is b
ased on the transformation of the displacement sensitivity characteris
tic of the damper into a velocity sensitivity characteristic, and then
using an integral formulation to obtain the damping force over the ve
locity range. The response characteristics of a single-degree-of-freed
om (DOF) isolator with displacement sensitive non-linear damper is obt
ained using the proposed formulation. A local equivalent linearization
technique based on energy similarity, as well as direct integration i
s used to obtain simulation results. The transmitted force-time histor
y as well as system transmissibility are compared with previous studie
s employing the traditional nonintegral approach for damping force for
mulation. Simulation results are also compared with available experime
ntal results to demonstrate the effectiveness of the proposed method.
It is shown that for displacement dependent dampers, the damper force
estimated using an integral formulation is the correct and accurate ap
proach for simulation purposes. (C) 1995 Academic Press Limited