Browse Publications Technical Papers 2001-01-0042

Modeling of Nonlinear Elastomeric Mounts. Part 1: Dynamic Testing and Parameter Identification 2001-01-0042

A methodology for modeling elastomeric mounts as nonlinear lumped parameter models is discussed. A key feature of this methodology is that it integrates dynamic test results under different conditions into the model. The first step is to model the mount as a linear model that is simple but reproduces accurately results from dynamic tests under small excitations. Frequency Response Functions (FRF) enables systematic calculation of the parameters for the model. Under more realistic excitation, the mount exhibits non-linearity, which is investigated in the next step. For nonlinear structures, a simple and intuitive method is to use time-domain force-displacement (F-x) curves.
Experiments to obtain the F-x curves involve controlling the displacement excitation and measuring the induced forces. From the F-x curves, stiffness and damping parameters are obtained with an optimization technique.
The paper also discusses the variation of stiffness and damping parameters with mean force and amplitude. Analytical expressions for spring constants and damping factor are obtained as functions of preload, amplitude and velocity.
This paper is the first of two papers describing the research effort on the elastomeric mount. The companion paper will discuss numerical modeling to validate and improve the relationship between the experiment results and the analytical model.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Modeling of Nonlinear Elastomeric Mounts. Part 2: Comparing Numerical Model and Test Results


View Details


Design of an Aluminum Truck Body Mounted on Chassis for Dry Cargo


View Details


Research on the Fatigue Durability Performance of a SUV Rear Axle


View Details