Comparison of experimental and numerical results for transient electromagnetic fields induced on a scale model aircraft by current-injection technique

In this article, we present the numerical analysis of a Free Standing Riser. The numerical simulation was carried out using a commercial riser analysis software suit. The numerical model’s dimensions were the same of a 1/70 reduced scale model deployed in a previous experiment. The numerical results were compared with experimental results presented in a previous article [1]. Discussion about the model and limitations of the numerical analysis is included.

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Finite element modelling of transient electromagnetic fields near steel-cased wells

Geophysical Journal International ◽

10.1093/gji/ggv193 ◽

2015 ◽

Vol 202 (2) ◽

pp. 901-913 ◽

Cited By ~ 39

Author(s):

Evan Schankee Um ◽

Michael Commer ◽

Gregory A. Newman ◽

G. Michael Hoversten

Keyword(s):

Finite Element ◽

Electromagnetic Fields ◽

Finite Element Modelling ◽

Element Modelling ◽

Transient Electromagnetic

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Interpolation method for transient electromagnetic fields

Il Nuovo Cimento C ◽

10.1007/bf02508015 ◽

1989 ◽

Vol 12 (5) ◽

pp. 555-565 ◽

Cited By ~ 1

Author(s):

M. S. Zhdanov ◽

M. A. Frenkel ◽

A. I. Katsevich

Keyword(s):

Electromagnetic Fields ◽

Interpolation Method ◽

Transient Electromagnetic

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Effective Shear Area in One Dimensional Ship Hull Finite Element Models to Predict Natural Frequencies of Vibration

Volume 2B: Structures, Safety and Reliability ◽

10.1115/omae2013-11463 ◽

2013 ◽

Author(s):

Osvaldo Pinheiro de Souza e Silva ◽

Severino Fonseca da Silva Neto ◽

Ilson Paranhos Pasqualino ◽

Antonio Carlos Ramos Troyman

Keyword(s):

Finite Element ◽

Natural Frequencies ◽

Three Dimensional ◽

Experimental Tests ◽

Numerical Results ◽

Computational Method ◽

Scale Model ◽

Dimensional Model ◽

One Dimensional ◽

Shear Area

This work discusses procedures used to determine effective shear area of ship sections. Five types of ships have been studied. Initially, the vertical natural frequencies of an acrylic scale model 3m in length in a laboratory at university are obtained from experimental tests and from a three dimensional numerical model, and are compared to those calculated from a one dimensional model which the effective shear area was calculated by a practical computational method based on thin-walled section Shear Flow Theory. The second studied ship was a ship employed in midshipmen training. Two models were made to complement some studies and vibration measurements made for those ships in the end of 1980 decade when some vibration problems in them were solved as a result of that effort. Comparisons were made between natural frequencies obtained experimentally, numerically from a three dimensional finite element model and from a one dimensional model in which effective shear area is considered. The third and fourth were, respectively, a tanker ship and an AHTS (Anchor Handling Tug Supply) boat, both with comparison between three and one dimensional models results out of water. Experimental tests had been performed in these two ships and their results were used in other comparison made after the inclusion of another important effect that acts simultaneously: the added mass. Finally, natural frequencies experimental and numerical results of a barge are presented. The natural frequencies numerical results of vertical hull vibration obtained from these approximations of effective shear areas for the five ships are finally discussed.

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