Dynamics Of Substructures Research Articles

Substructure behaviour of resilient support mounts for single and double stage mounting systems

Resilient mounting systems of machines provide a powerful means of isolating structure-borne sound on its path from the machine to the foundation. Optimization of active and passive isolation of machine foundations requires knowledge about the propagation of structure-borne sound in its substructures. The substructure behaviour of elastomer isolators for resiliently mounted engines define mixed boundary value problems for the field equations. It is shown that the CAD compatible boundary element method (BEM) provides a powerful tool to predict the substructure dynamics in the design state by taking complicated three-dimensional geometry, viscoelastic material properties and temperature influence into account. Static preloads and superimposed vibratory loads are simulated experimentally and the measured response is compared with results from rod theory, finite element and boundary element discretizations.