Experimental investigation into a passive vibration isolator incorporating a bistable composite plate

A. D. Shaw, S. A. Neild, D. J. Wagg, P. M. Weaver, A. Carrella

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

Vibration isolation is an important requirement throughout much of engineering. Furthermore, interest in adding multifunctionality to composite materials has led to work on bistable composite structures, that can 'snap' between two different shapes. The current work investigates a passive vibration isolation mount that implements the High Static Low Dynamic Stiffness (HSLDS) concept. The HSLDS concept promotes vibration isolation by reducing dynamic stiffness and therefore natural frequency, whilst preserving weight bearing capacity by maintaining good static stiffness. The snap-through of a bistable composite plate is used as a negative stiffness nonlinear spring, which is connected in parallel with linear springs to provide the required nonlinear spring response. We present the experimental dynamic response of a mass-spring system using this nonlinear spring, subjected to harmonic base excitation. We also present the quasi-static force displacement response of the plate, and use a mathematical function fitted to this data to make theoretical predictions for the dynamic response. Experimental results show good agreement with theoretical predictions.

Original languageEnglish
Title of host publication54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
DOIs
Publication statusPublished - 2 Aug 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, United States
Duration: 8 Apr 201311 Apr 2013

Conference

Conference54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityBoston, MA
Period8/04/1311/04/13

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