Experimental Identification of Overall Structural Damping of System

Radoičić, Goran; Jovanović, Miljana

doi:10.5545/sv-jme.2012.569

Cited by 10 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is accounted for in the FE model of the UC from Eq. (1) by considering a complex stiffness matrix K in the dynamic stiffness matrix as follows [39,51]:…”

Section: Locally Resonant Metamaterials Designmentioning

confidence: 99%

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

Belle

Claeys

Deckers

et al. 2017

Journal of Sound and Vibration

View full text Add to dashboard Cite

Recently, locally resonant metamaterials have come to the fore in noise and vibration control engineering, showing great potential due to their superior noise and vibration attenuation performance in targeted and tunable frequency ranges, referred to as stop bands. Damping has an important influence on the performance of these materials, broadening the frequency range of attenuation at the expense of peak attenuation. As a result, understanding and including the effects of damping is necessary to more accurately predict the attenuation performance of these locally resonant metamaterials. Classically, these often periodic structures are analysed using a unit cell modelling approach to predict wave propagation and thus stop band behaviour, discarding damping. In this work, a unit cell method including damping is used to analyse the complex dispersion curves of a locally resonant metamaterial design. The wave solutions in and around the stop band frequency range are compared to those of the unit cell method discarding damping. The influence on the dispersion curves of damping in resonator and host structure is discussed and the obtained dispersion curves are validated through an experimental dispersion curve measurement based on an Extended Inhomogeneous Wave Correlation method using Scanning Laser Doppler Vibrometry for a metamaterial plate manufactured at a representative scale. Excellent agreement is obtained between the numerically predicted and experimentally retrieved dispersion curves.

show abstract

“…This is accounted for in the FE model of the UC from Eq. (1) by considering a complex stiffness matrix K in the dynamic stiffness matrix as follows [39,51]:…”

Section: Locally Resonant Metamaterials Designmentioning

confidence: 99%

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

Belle

Claeys

Deckers

et al. 2017

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

“…The FE equations of motion are where M is the mass matrix, KT is the complex stiffness matrix and F is the excitation force. Structural damping is introduced by introducing η in KT as follows, using a Nastran solver (Rose, 2002; Radoičić and Jovanović, 2013) where K and KE are the global stiffness matrix and element stiffness matrix, respectively. Applying these constant values for η in the numerical models over the whole frequency range of interest is expected to result in a reasonable approximation of the experimental results.…”

Section: Power Injection Methodsmentioning

confidence: 99%

Experimental validation of numerical structural dynamic models for metal plate joining techniques

Belle

Brandolisio

Deckers

et al. 2017

Journal of Vibration and Control

View full text Add to dashboard Cite

Joined structures are of high industrial relevance. The dynamic effects of joints are however often practically difficult to accurately account for in numerical models, as they often lead to local changes in stiffness and damping. This paper discusses the comparison between measurements and simulations of joined panels considering four different joining techniques: adhesive bonding, metal inert gas welding, resistance spot welding and flow drill screwing. An experimental modal analysis is performed on the different systems and the Power Injection Method is applied to determine the loss factors of single plate systems and their joined counterparts. The joined panels are modeled in a holistic simulation environment with particular focus on the joining region, by application of predefined and generic joint models. A very good agreement is obtained between the simulated dynamic behavior and the experimental results, showing that an accurate representation of the joints has been obtained.

show abstract

“…Motion control studies have become a key subject of robotics and other automation-related research areas. In the manufacturing industry, high-speed and sensitive motion control are necessary for highspeed and high quality production [1]. However, the requirement for high speed makes sensitive motion control difficult to accomplish due to residual vibrations.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Control Technique for the Elimination of Residual Vibrations in Flexible-Joint Manipulators

Conker¹,

Kılıç²,

Mıstıkoğlu³

et al. 2014

SV-JME

View full text Add to dashboard Cite

One method used to reduce or eliminate residual vibrations is to modify the input signal by using previously determined system parameters. In order to eliminate the residual vibration completely, these system parameters must be very accurately determined. In real systems, achieving such accuracy may not always be possible. To address this problem and to provide a solution, a new residual vibration elimination method is introduced in this study, which has proven to be useful especially in cases of uncertain parameters of estimated or predicted systems. It is shown that the technique is capable of handling high levels of uncertainty and is able to successfully eliminate or reduce residual vibrations in flexible systems. In this approach, the desired position of the system is primarily divided into two equal parts, and the generated input signal is used to eliminate vibration. This study presents theoretical and experimental results of the techniques applied to a flexible mechanical system; a comparative study of robustness performance is also provided. Simulation and experimental results show that the oscillations are considerably decreased with a high degree of robustness in the presence of uncertainty regarding system parameters.

show abstract

Experimental Identification of Overall Structural Damping of System

Cited by 10 publications

References 8 publications

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

Experimental validation of numerical structural dynamic models for metal plate joining techniques

An Enhanced Control Technique for the Elimination of Residual Vibrations in Flexible-Joint Manipulators

Contact Info

Product

Resources

About