Nonlinearity is a frequent occurrence in engineering structures. The nonlinearity detection in the operating mechanical systems is important because the nonlinearity can change the dynamic behaviour. The aim of this work is to experimentally measure the nonlinearity of a flexible beam structure due to the different applied dynamic load configurations. In this study, the modal parameters were obtained from the modal testing. The excitation approach by adopted the burst random excitation through an electromagnetic shaker and the vibration response was measured using accelerometers. The frequency response function (FRF) at different level of dynamic excitation was utilized to exhibits the nonlinear behaviour. The elastic vibration characteristics which are bending and torsional modes were compared to identify the nonlinear. As a conclusion, the results showed that the nonlinear property of the flexible beam is due to the geometric nonlinearity.
Experimental Assessment of Nonlinear Modal Behaviour of Flexible Beam
Lect.Notes Mechanical Engineering
Proceedings of International Conference of Aerospace and Mechanical Engineering 2019 ; Kapitel : 53 ; 601-608
2020-06-13
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Nonlinear , Structural dynamics , Experimental modal analysis , Frequency response function Engineering , Aerospace Technology and Astronautics , Vibration, Dynamical Systems, Control , Fluid- and Aerodynamics , Quality Control, Reliability, Safety and Risk , Engine Technology , Engineering Thermodynamics, Heat and Mass Transfer
Experimental research on flexible beam modal control
AIAA | 1985
|Experimental research on flexible beam modal control
AIAA | 1984
|Independent modal control for nonlinear flexible structures: An experimental test rig
Online Contents | 2010
|Nonlinear Modal Aeroservoelastic Analysis Framework for Flexible Aircraft
Online Contents | 2016
|