A Finite Element Method for Computation of Structural Intensity by the Normal Mode Approach

Gavric, L.; Pavić, Goran

doi:10.1006/jsvi.1993.1194

Cited by 138 publications

(67 citation statements)

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“…Several methods are available to determine the structural intensity vector field for bending waves in plate-like structures from out-of-plane velocity or acceleration data [1, 11,12]. In this paper the formulation of Arruda and Mas [7] is used, which is based upon the classical plate theory [13] for noninteracting propagating waves (absence of acoustic nonlinearity):…”

Section: Theorymentioning

confidence: 99%

Measurement-based determination of the irrotational part of the structural intensity by means of test functional series expansion

Roozen

Guyader

Glorieux

2015

Journal of Sound and Vibration

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The irrotational part of the structural intensity for flexural wave motion in plate-like structures is calculated from measurement data of kinematic quantities, such as out-of-plane velocities, by a new method that makes use of a test functional series expansion. The computation of the structural intensity and its irrotational part, which allows to effectively assess vibrational sources and sinks, is less sensitive to measurement noise as compared to standard approaches.

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Section: Theorymentioning

confidence: 99%

Measurement-based determination of the irrotational part of the structural intensity by means of test functional series expansion

Roozen

Guyader

Glorieux

2015

Journal of Sound and Vibration

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“…1 can be expressed as (Gavric and Pavic, 1993) ( 2) where , , , , , represent axial force, shear forces, bending moments and torque, respectively. , , and , are translational and rotational velocities, respectively.…”

Section: Formulation Of Structural Intensity For Ship Structurementioning

confidence: 99%

“…Analytical approaches to calculate structural intensity have been also carried out for the elastic vibration of thin cylindrical shells (Pavic, 1990 andWilliams, 1991), the elastic vibration of uniform infinite beam and plate (Xu and Koss, 1995), the torsional vibration of solid and hollow cylindrical bars (Pan and Pan, 1998), and the in-plane vibration of rectangular plates (Farag and Pan, 1998). Structural intensity analysis using the finite element method (FEM) was also formulated by Hambric (1990) and Gavric and Pavic (1993). Using the FEM, structural intensity fields for frame and cylindrical shell structures (Alfredsson et al, 1996), composite plates with a hole , stiffened plates ) and box-girder structure (Lee and Cho, 2001 The structural intensity approach has been successfully used in the field of plate vibration to determine major vibration transmission paths.…”

Section: Introductionmentioning

confidence: 99%

Structural intensity analysis of a large container carrier under harmonic excitations of propulsion system

Cho¹,

Kim²,

Kim³

2010

International Journal of Naval Architecture and Ocean Engineeri

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“…Finite element computations for vibration intensity were reported in references (4,5) . Different commercial packages were used for calculating the field variables of the model.…”

Section: Computation Methodsmentioning

confidence: 99%

Improved Transmission Path Visualization of Vibration Power Flow for Stiffened Plate Using Streamlines Representation

파와지¹,

정운창²,

오재응³

2012

Transactions of the Korean Society for Noise and Vibration Engi

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Vibration intensity has been used to localize vibration source of a vibrating system. Not only that, vibration intensity has also been used for structural diagnostic in identifying crack and mounted stiffeners. To clearly identify the location of vibration source and understand the changes of energy transmission path, clear flow visualization is required. Most of previous works used vectors to indicate the magnitude and direction of emerging vibration energy and transmission paths. However, due to the large surface area of a plate like-structure, clear transmission paths cannot be achieved using vector visualization. This becomes an issue when detail vector flow at all locations of the whole plate surface is required. In this study, streamlines visualization is used to clearly indicate the power flow transmission path at all plate surface. By using streamlines representation, not only clear transmission paths are obtained, but also improves the vector visualization which helps us to understand the changes of the energy flow especially for stiffened plates. In this study, vibration intensity computation is firstly compared to previous work to validate the vibration intensity computation. To clearly show the power flow transmission paths, streamlines representation is shown. This representation overcomes the unclear vector direction especially for stiffened plates. Different pattern of energy transmission path can be observed using streamlines representation for stiffened and unstiffened plate.The complex streamlines pattern can also be observed at high resonance frequencies which is unclear by using vector representation.

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A Finite Element Method for Computation of Structural Intensity by the Normal Mode Approach

Cited by 138 publications

References 0 publications

Measurement-based determination of the irrotational part of the structural intensity by means of test functional series expansion

Measurement-based determination of the irrotational part of the structural intensity by means of test functional series expansion

Structural intensity analysis of a large container carrier under harmonic excitations of propulsion system

Improved Transmission Path Visualization of Vibration Power Flow for Stiffened Plate Using Streamlines Representation

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