Forced Response and Damping Characteristics of a Cantilever Beam with a ThickDamping Layer

摘要

The controll of hull radiated noise is very important for navel platforms. Boththe DREA Ship Structural Mechanics Group (SM group) and the DREA Dockyard Laboratory (Dockyard Lab) have been conducting research on the application of elastometric materials to vibration isolation and damping systems used for the reduction of machinery and hull vibrations. Over the past twenty years the SM group has developed, in-house and through contract, the general purpose finite element computer code VAST for vibration and strength analysis of complex structures. Recently the code capabilities have been extended to allow modelling of vibration isolation and damping systems which include 'rubber-like' materials having frequency dependent damping and stiffness properties. The Dockyard Lab has developed methods for measuring these properties and as part of their work on development of vibration damping materials and decoupling tiles, they contracted the Centre for Cold Oceans Resources Engineering at Memorial University to