A Symmetric and Low-Frequency Stable Potential Formulation for the Finite-Element Simulation of Electromagnetic Fields

2016 ◽  
pp. 63-71
Author(s):  
Martin Jochum ◽  
Ortwin Farle ◽  
Romanus Dyczij-Edlinger
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Electromagnetic Fields ◽  
Low Frequency ◽  
Potential Formulation ◽  
Element Simulation

Simulation research on low frequency sound absorption of monostable metamaterials

2021 ◽  
Vol 263 (6) ◽  
pp. 648-652
Author(s):  
Tuo Xing ◽  
Xianhui Li ◽  
Xiaoling Gai ◽  
Zenong Cai ◽  
Xiwen Guan
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Theoretical Model ◽  
Finite Element Simulation ◽  
Sound Absorption ◽  
Magnetic Force ◽  
Low Frequency ◽  
Low Frequencies ◽  
Element Simulation ◽  
Simulation Results

The monostable acoustic metamaterial is realized by placing a flexible panel with a magnetic proof mass in a symmetric magnetic field. The theoretical model of monostable metamaterials has been proposed. The method of finite element simulation is used to verify the theoretical model. The magnetic force of the symmetrical magnetic field is simplified as the relationship between force and displacement, acting on the mass. The simulation results show that as the external magnetic force increases, the peak sound absorption shifts to low frequencies. The theoretical and finite element simulation results are in good agreement.

The finite-element simulation of low-frequency bimorph transducers for the diagnostics and activation of oil wells

2017 ◽  
Vol 63 (6) ◽  
pp. 737-743 ◽  
Author(s):  
A. N. Rybyanets ◽  
A. V. Nasedkin ◽  
S. A. Shcherbinin ◽  
E. I. Petrova ◽  
N. A. Shvetsova ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Low Frequency ◽  
Oil Wells ◽  
Element Simulation

Using simulation to predict reverberation room performance: Validation and parameter study

2021 ◽  
Vol 263 (2) ◽  
pp. 4903-4912
Author(s):  
Jared Schmal ◽  
David Herrin ◽  
Jennifer Shaw ◽  
Charlie Moritz ◽  
Alexis Talbot ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Low Frequency ◽  
Parameter Study ◽  
Trial And Error ◽  
Element Simulation ◽  
Frequency Behavior ◽  
Performance Validation ◽  
Design Ideas ◽  
Simple Parameter

Predicting the behavior of a reverberation room is inherently challenging and often puzzling. Many still rely on a time-consuming trial-and-error approach when designing the interior and placing diffusers to achieve a diffuse field. An accurate finite element simulation of a reverberation room would enable design ideas and modifications to be tested without any downtime of the physical room. Room modifications of interest are diffuser geometry, material, size, and placement, and the addition of tuned absorbers. For a simulation to be capable of such a task, each surface would need to accurately emulate the material specific behaviors occurring in the room. A finite element simulation in Actran VI was tuned to reflect the real-world low-frequency behavior of the reverberation room at Blachford Acoustics located in West Chicago, IL. A detailed analysis of the process and methods used to create and verify the model are discussed. This is followed by a simple parameter study to look at some modifications of interest.

Structural dynamics of a dowelled-joist timber floor in the low-frequency range modelled using finite element simulation

2017 ◽  
Vol 148 ◽  
pp. 602-620 ◽  
Author(s):  
M. Filippoupolitis ◽  
C. Hopkins ◽  
R. Völtl ◽  
U. Schanda ◽  
J. Mahn ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Structural Dynamics ◽  
Low Frequency ◽  
Frequency Range ◽  
Element Simulation
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