Perforated Damping Treatment; A Novel Approach to Reduction of Weight

Akanda, Anab; Önsay, Taner; Goetchius, Gregory M.

doi:10.4271/1999-01-1679

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As to the free-layer damping treatments, the CLD configuration can also be optimized using partial treatments. [14][15][16] In these partial treatments, the damping layer does not entirely cover the host structure's surface but is applied onto selected locations that maximize the relation between the overall damping achieved and the treatment extension (that translates to added mass and treatment cost). Obviously, this optimal localization of the partial treatment configuration depends on the host structure geometry and target frequency range simply because the damping patches must be located where the shear of the VEM layer is maximized, which closely depends on the mode shapes of the structure.…”

Section: Research On the Optimization Of Constrained Layer Damping Tr...mentioning

confidence: 99%

Simulation on dynamic passive control of structures using corrugated viscoelastic damping treatments

Moreira,

Marques

2024

SIMULATION

View full text Add to dashboard Cite

Passive damping treatments using viscoelastic materials (VEMs) are widely applied as addon solutions to control the dynamic response of light structures. These surface treatments are simple, reliable, and can be optimized by using proper design rules and simulation tools. In this work, a new treatment configuration is proposed, simulated, and assessed, being compared with the most effective configuration currently used. The novelty resides in the VEM layer’s geometry, which in the proposed configuration assumes a waved shape. This waved shape is imposed to the viscoelastic layer due to indentations created in the inner faces of the host structure and the constraining layer. The results demonstrate that the wavy configuration, designated as corrugated viscoelastic layer (CVL), outperforms the typical damping treatments for relatively thick host structures and when using thick VEM layers. In addition, this new configuration reduces the stiffness decoupling effect due to the soft VEM layer, restoring the flexural stiffness of the original undamped structure.

show abstract

Section: Research On the Optimization Of Constrained Layer Damping Tr...mentioning

confidence: 99%

Simulation on dynamic passive control of structures using corrugated viscoelastic damping treatments

Moreira,

Marques

2024

SIMULATION

View full text Add to dashboard Cite

show abstract

“…In order to obtain a quieter machine, the application of a damping treatment in the design of the structure is very desirable [6]. From the above analysis, the answers to the questions of where and how much damping material should be applied for maximum benefit should be determined.…”

Section: Improved Design Of the Structurementioning

confidence: 99%

Reduction in machine noise and vibration levels based on the statistical energy analysis method

Cui

Craighead

2000

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

In noise and vibration control, damping treatment and isolation of structures are often applied to dissipate the energy of flexural vibrations and to reduce the transmission of energy to the surroundings. However, these treatments must be carefully designed because the present requirements of the size, power and noise levels resulting from commercial competition are very restrictive and usually there is little space to put additional material. In this paper, the statistical energy analysis (SEA) method has been used to optimize such treatment. The power balance equations have been established for a motor-fan-casing unit, and the design and possible modifications have been analysed with an SEA model. The energy transmission paths within the structure have been clearly identified and the test results confirmed the accuracy of this model. The optimum has been determined and lower noise levels have been verified by tests. A significant reduction in noise level has been achieved and the example has shown that an SEA model is very useful for analysing structures with regard to noise and vibration levels.

show abstract

Dimensionless analysis of constrained damping treatments

Sher

Moreira

2013

Composite Structures

View full text Add to dashboard Cite

Abstract:One of the most effective ways of controlling vibrations in plate or beam structures is by means of constrained viscoelastic damping treatments. Contrary to the unconstrained configuration, the design of constrained and integrated layer damping treatments is multifaceted because the thickness of the viscoelastic layer acts distinctly on the two main counterparts of the strain energy the volume of viscoelastic material and the shear strain field. In this work, a parametric study is performed exploring the effect that the design parameters, namely the thickness/length ratio, constraining layer thickness, material modulus, natural mode and boundary conditions have on these two counterparts and subsequently, on the treatment efficiency. This paper presents five parametric studies, namely, the thickness/length ratio, the constraining layer thickness, material properties, natural mode and boundary conditions. The results obtained evidence an interesting effect when dealing with very thin viscoelastic layers that contradicts the standard treatment efficiency vs. layer thickness relation; hence, the potential optimisation of constrained and integrated viscoelastic treatments through the use of properly designed thin multilayer configurations is justified. This work presents a dimensionless analysis and provides useful general guidelines for the efficient design of constrained and integrated damping treatments based on single or multi-layer configurations. (C) 2012 Elsevier Ltd. All rights reserved.

show abstract

Perforated Damping Treatment; A Novel Approach to Reduction of Weight

Cited by 3 publications

References 5 publications

Simulation on dynamic passive control of structures using corrugated viscoelastic damping treatments

Simulation on dynamic passive control of structures using corrugated viscoelastic damping treatments

Reduction in machine noise and vibration levels based on the statistical energy analysis method

Dimensionless analysis of constrained damping treatments

Contact Info

Product

Resources

About