Published in: 2nd International Conference on Acoustics and Vibration
COI code: ISAV02_223
Paper Language: English
How to Download This Paper
For Downloading the Fulltext of CIVILICA papers please visit the orginal Persian Section of website.
Authors DYNAMIC EXPERIMENTAL TESTING SETUP AND EVALUATION FOR NON-LINEAR RESONANT DECAY METHOD (NLRDMMehdi Sarmast - Mechanical Engineering Department, East Tehran Branch, Islamic Azad University
Jan R. Wright - School of Engineering, The University of Manchester, Manchester, UK.
Abstract:The previous papers have discussed the theoretical and simulation behaviour of NL-RDM. In this paper preparations for the dynamic experimental testing and evaluation are explored. Any ex-perimental rig used to evaluate NL-RDM would be required to meet certain criteria. Any rig would have to be a multi-DOF setup in order to begin to evaluate the abilities of the method to analyse similar models. So, the rig is introduced and some information about instrumentation and data ac-quisition provided. Parts of the rig will be tested statically and dynamically. The system tested was a 2DOF lumped parameter linear system to which a nonlinear element was added, in the form of a clamped-clamped beam. The beam was evaluated for the degree of nonlinearity present and its suit-ability to be tested experimentally as a cubic stiffening spring.The system was tested using random excitation and FRFs were obtained for analysis. FRFs showed a clear shift in natural frequency for rising levels of excitation, demonstrating clear harden-ing stiffness non-linearity. The system was also tested using stepped sine excitation and FRFs again obtained. The results showed clear ‘jumps’ at higher levels of excitation, again demonstrating that non-linearity was present.The experimental rig is evaluated in relation to the degree of non-linearity present, linearity at low force vibration levels, degree of noise present and other variables that may affect the test re-sults, as discussed in other papers. Additionally other more general problems in testing are dis-cussed and where possible solutions proposed. Following this evaluation a final design is proposed for adoption in the testing phase.
Keywords:Nonlinear System Identification; NL-RDM; FRF; Experimental Vibration
COI code: ISAV02_223
how to cite to this paper:If you want to refer to this article in your research, you can easily use the following in the resources and references section:
Sarmast, Mehdi & Jan R. Wright, 2012, DYNAMIC EXPERIMENTAL TESTING SETUP AND EVALUATION FOR NON-LINEAR RESONANT DECAY METHOD (NLRDM, 2nd International Conference on Acoustics and Vibration, تهران, دانشگاه صنعتي شريف, https://www.civilica.com/Paper-ISAV02-ISAV02_223.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Sarmast, Mehdi & Jan R. Wright, 2012)
Second and more: (Sarmast & Wright, 2012)
For a complete overview of how to citation please review the following CIVILICA Guide (Citation)
The University/Research Center Information:
Type: Azad University
Paper No.: 1243
in University Ranking and Scientometrics the Iranian universities and research centers are evaluated based on scientific papers.
Research Info Management
Export Citation info of this paper to research management softwares
New Related Papers
- Effects of Nanofluids Thermo-Physical Properties on the Heat Transfer and 1st law of Thermodynamic in a Serpentine PVT System
- ENTROPY ANALYSIS OF MIXED CONVECTION MHD FLOW OF NANOFLUID OVER STRETCHING INCLINED SHEET WITH THERMAL RADIATION
- Investigation of thermal creep flow in divergent micro/nanochannels
- Numerical and Experimental Investigations on the Effect of Adding Nanoparticles on Entropy Generation in PVT Systems
- NUMERICAL INVESTIGATION OF THE BOLTZMANN EQUATION BY TRMCMETHOD TO SIMULATE FLOW OVER A FLAT NANOPLATE
The Above articles are recently indexed in the related subjects
Iran Scientific Advertisment Netword
Share this paper
WHAT IS COI?
COI is a national code dedicated to all Iranian Conference and Journal Papers. the COI of each paper can be verified online.