Numerical and experimental investigations on structural intensity in plates

Petrone, Giuseppe; Vendittis, M. De; Rosa, Sergio De

doi:10.1016/j.compstruct.2015.12.034

Cited by 32 publications

(8 citation statements)

References 11 publications

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“…This approach was not just used to analyze the energy transmission on plates but also on general structures with irregular shapes. The geometries of interest are mainly developed as finite element (FE) models by using solid (Hambric and Szwerc, 1999;Shepherd et al, 2012;Xu et al, 2004a) or shell elements (Gavrić and Pavić, 1993;Hambric, 1990;Lee et al, 2006;Li and Lai, 2000;Liu et al, 2005;Petrone et al, 2016;Xu et al, 2004b). A variety of works were reported in literature, such as the SI study on cracks present in ships or off-shore platforms (Cho et al, 2010;Tian et al, 2017), of locally resonant metamaterials (Al Ba'ba'a et al, 2018;Al Ba'ba'a and Nouh, 2017) and of stiffened or ribbed plates (Cho et al, 2017;Schaal et al, 2016;Xu et al, 2005).…”

Section: Jasamentioning

confidence: 99%

Structural intensity assessment on shells via a finite element approximation

Pires

Avril

Vanlanduit

et al. 2019

The Journal of the Acoustical Society of America

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The structural intensity on plates or shells can provide insights on how the vibrational energy is transmitted throughout a sample. Its assessment via experimental deflections are widely documented in the case of plates, which just requires the computation of spatial derivatives of out-of-plane displacements or velocities and a knowledge of the sample's material properties. However, if the structural intensity is to be assessed on arbitrary shells, a more elaborate data processing is required. The in-plane displacements become relevant terms and the spatial derivatives along a predefined local coordinate system need to be computed. Here, a method from which experimental data is interpolated on a finite element mesh is proposed. Firstly, the global displacements and shape of a sample's outer-surface are measured. These data are then projected on a quadratic mesh, where the Kirchhoff plate theory is invoked for the individual elements. The data differentiation is computed via quadratic shape functions, from which the strains and structural intensity are estimated. Through the obtained vibrational energy results on the basis of measured displacement and shape data and by validating the method via a numerical simulation, the proposed work has shown to be a reliable tool to assess energy transmission on irregular shells.

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Section: Jasamentioning

confidence: 99%

Structural intensity assessment on shells via a finite element approximation

Pires

Avril

Vanlanduit

et al. 2019

The Journal of the Acoustical Society of America

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“…It means that it can describe the vibration more comprehensively. erefore, the power flow is selected as an evaluation index to reflect structural vibration [31,32]. e foundation is mainly composed of several flat-plate structures.…”

Section: Position Analysis For Laying Emwmmentioning

confidence: 99%

Research on Vibration Reduction Design of Foundation with Entangled Metallic Wire Material under High Temperature

Zhu

Bai

et al. 2019

Shock and Vibration

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When the submarine is sailing at full speed, the power cabin has an abnormally high temperature. However, in the previous research on the vibration reduction design of the foundation, the influence of high temperature on the vibration characteristics of the foundation is not taken into account. In this paper, a new composite foundation with entangled metallic wire material (EMWM) is presented to reduce the vibration of the foundation. The energy transfer path of the foundation was obtained by the power flow method, and then the layout of EMWM was determined. The optimization of the constraining layer was carried out by modal analysis. The damping performance of the composite foundation with EMWM was validated by the thermal-vibration joint test. The results show that, at room temperature, the composite foundation has remarkable vibration reduction efficiency in the middle and high-frequency bands. The maximum insertion loss can reach 15.37 dB. The insertion loss varies with the location of the excitation point. As the temperature rises to 300°C, the insertion loss in the low-frequency band was improved, and the insertion loss is not influenced by the excitation position.

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“…[26] used measured data of kinematic quantities to compute structural intensity and its irrotational part in plate-like structures. Very recently, Petrone et al [27] presented numerical and experimental analysis on structural intensity in orthotropic rectangular plates, investigating the effects of constraints, load conditions, damping, thickness and fibers orientation. Finally, it is worthy to mention novel attempt to extend the SI concept to the random domain by introducing a physical quantity denominated random structural intensity (RSI), with application to mechanical systems whose dynamical responses are stochastic due to random excitations [28].…”

Section: Introductionmentioning

confidence: 99%