&lt;title&gt;Revised modal strain energy method for finite element analysis of viscoelastic damping treated structures&lt;/title&gt;

Xu, Yanchu; Liu, Yanning; Wang, Bill S.

doi:10.1117/12.472676

Cited by 9 publications

(3 citation statements)

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“…The imaginary components introduced by the viscoelastic material are neglected. A revised formulation has been proposed by Xu et al (2002) to provide a better approximation of the loss factor for high material loss factors. However, the revision is still limited to the undamped eigenmodes.…”

Section: Structural Loss Factormentioning

confidence: 99%

Multi-material topology optimization of viscoelastically damped structures using a parametric level set method

Kolk

Veen

Vreugd

et al. 2015

Journal of Vibration and Control

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The design of high performance instruments often involves the attenuation of poorly damped resonant modes. Current design practices typically rely on informed trial and error based modifications to improve dynamic performance. In this article, a multi-material topology optimization approach is presented as a systematic methodology to develop structures with optimal damping characteristics. The proposed method applies a multi-material, parametric, level set-based topology optimization to simultaneously distribute structural and viscoelastic material to optimize damping characteristics. The viscoelastic behavior is represented by a complex-valued material modulus resulting in a complex-valued eigenvalue problem. The structural loss factor is used as objective function during the optimization and is calculated using the complex-valued eigenmodes. An adjoint sensitivity analysis is presented that provides an analytical expression for the corresponding sensitivities. Multiple numerical examples are treated to illustrate the effectiveness of the approach and the influence of different viscoelastic material models on the optimized designs is studied. The optimization routine is able to generate designs for a number of eigenmodes and to attenuate a resonant mode of an existing structure.

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Section: Structural Loss Factormentioning

confidence: 99%

Multi-material topology optimization of viscoelastically damped structures using a parametric level set method

Kolk

Veen

Vreugd

et al. 2015

Journal of Vibration and Control

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“…However, one drawback of this method is that it uses the real normal modes of the corresponding undamped system to calculate the strain energy, and this would affect the accuracy of the results especially when the material loss factor is high because the damping of the system itself influences the modes of the whole structure. This problem is discussed in detail by Xu et al [54], as well as a proposed simple revised MSE method for resolving this problem.…”

Section: Structure Of the Materialsmentioning

confidence: 99%

A Review of Prediction Methods for the Transient Vibration and Sound Radiation of Plates

Mak

2013

Journal of Low Frequency Noise, Vibration and Active Control

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Transient noise is a typical real-life noise problem. In order to develop efficient methods of dealing with it, the generating and transmitting mechanisms of transient noise radiating from a vibrating structure have been widely studied. The analytical methods used differ according to the properties of the excitation, structure, and acoustic environment. Focusing on plate-like structures, this paper provides an overview of commonly-used approaches to the analysis of structural transient vibration and sound radiation (TVSR). A general process for solving this type of problem is presented, together with suggestions for future work in this field.

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“…Research has been carried out on various aspects such as developing methodologies for the faster prediction of the damped response of structures [29][30], optimisation of damper location [31][32], and development of new damping polymers to suit different automotive components [33][34]. A detailed review of modelling and finite element implementation of viscoelastic damping is given in Vasques et al [35].…”

Section: Finite Element Modelling Of Tvdsmentioning

confidence: 99%

Vibration suppression and coupled interaction study in milling of thin wall casings in the presence of tuned mass dampers

Kolluru

Axinte

Raffles

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part B:

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Damping of machining vibrations in thin walled structures is an important area of research due to the ever-increasing use of lightweight structures such as jet engine casings. Previous work reported in the literature has focussed on passive and active damping solutions for simple planar thin walls; whereas vibration damping in thin wall ring type casings was not reported. Moreover, implementation of any of these solutions on an industrial scale component needs proven simulation tools for validation. In this work, a passive damping solution in the form of tuned viscoelastic dampers is studied to minimise the vibration of thin walled casings. The implementation of tuned dampers was driven by a specific characteristic observed for the casing under study where a couple of modes dominate the dynamic response. Finite element simulation studies are carried out for a casing both with and without passive dampers, and are validated using machining tests and experimental modal tests. The finite element predictions are found to match with experimental results with reasonable accuracy.

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<title>Revised modal strain energy method for finite element analysis of viscoelastic damping treated structures</title>

Cited by 9 publications

References 0 publications

Multi-material topology optimization of viscoelastically damped structures using a parametric level set method

Multi-material topology optimization of viscoelastically damped structures using a parametric level set method

A Review of Prediction Methods for the Transient Vibration and Sound Radiation of Plates

Vibration suppression and coupled interaction study in milling of thin wall casings in the presence of tuned mass dampers

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