scholarly journals FINITE ELEMENT APROACH TO A COUPLED STRUCTURAL ACOUSTIC SYSTEM: APPLICATION TO A LOUDSPEAKER CABINET

2010 ◽  
Vol XIX (IX), 2010/1 (1) ◽  
Author(s):  
SEGURA ALCARAZ J. ◽  
GADEA BORRELL ◽  
JULIÁ SANCHIS E. J. M. ◽  
MASIÁ VAÑÓ J. ◽  
RAMIS SORIANO J.
Keyword(s):  
Finite Element ◽  
System Application ◽  
Acoustic System

Design and Simulation of a Kind of Ultrasonic Deicing Acoustic System

2012 ◽  
Vol 203 ◽  
pp. 500-503 ◽  
Author(s):  
Yun Dian Zhang ◽  
Long Shen Han
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Computer Software ◽  
New Method ◽  
Acoustic System ◽  
Element Simulation

Ultrasonic deicing is a new method of deicing. This paper analyzed and designed a kind of ultrasonic deicing acoustic system, then simulated it with the ANSYS, which is a kind of finite element simulation computer software used to do finite element simulation work. The results indicate that the frequency and mechanical properties of the acoustic system meet the expectant demand.

Modified Interval Perturbation Finite Element Method for a Structural-Acoustic System With Interval Parameters

2013 ◽  
Vol 80 (4) ◽  
Author(s):  
Baizhan Xia ◽  
Dejie Yu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stiffness Matrix ◽  
Dynamic Equilibrium ◽  
Dynamic Stiffness ◽  
Response Analysis ◽  
Acoustic System ◽  
Dynamic Stiffness Matrix ◽  
Interval Parameters ◽  
Element Method

For the frequency response analysis of the structural-acoustic system with interval parameters, a modified interval perturbation finite element method (MIPFEM) is proposed. In the proposed method, the interval dynamic equilibrium equation of the uncertain structural-acoustic system is established. The interval structural-acoustic dynamic stiffness matrix and the interval force vector are expanded by using the first-order Taylor series; the inversion of the invertible interval structural-acoustic dynamic stiffness matrix is approximated by employing a modified approximate interval-value Sherman–Morrison–Woodbury formula. The proposed method is implemented at an element-by-element level in the finite element framework. Numerical results on a shell structural-acoustic system with interval parameters verify the accuracy and efficiency of the proposed method.

A homogenization-based Chebyshev interval finite element method for periodical composite structural-acoustic systems with multi-scale interval parameters

2018 ◽  
Vol 233 (10) ◽  
pp. 3444-3458 ◽  
Author(s):  
Ning Chen ◽  
Jiaojiao Chen ◽  
Jian Liu ◽  
Dejie Yu ◽  
Hui Yin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sound Pressure ◽  
Acoustic System ◽  
Interval Parameters ◽  
Multi Scale ◽  
Small Uncertainty ◽  
Interval Finite Element Method ◽  
Scale Interval ◽  
Element Method

For the periodical composite structural-acoustic system with multi-scale interval uncertainties, a new interval analysis approach is presented in this study. In periodical composites structural-acoustic systems with multi-scale interval parameters, the variation ranges of the sound pressure response can be calculated using the homogenization-based interval finite element method. However, the homogenization-based interval finite element method that is based on Taylor series can only suit periodical composites structural-acoustic problems with small uncertainty degree. To consider larger uncertainty degree, by combining the Chebyshev polynomial series and the homogenization-based finite element, a homogenization-based Chebyshev interval finite element method is presented to predict the sound pressure responses of the structural-acoustic system involving periodical composite and multi-scale interval parameters. Compared with homogenization-based interval finite element method, homogenization-based Chebyshev interval finite element method can obtain higher accurate numerical solutions in the approximate process. Besides, homogenization-based Chebyshev interval finite element method can be implemented without conducting the complex derivation process. Numerical results verify the validity and practicability of the presented homogenization-based Chebyshev interval finite element method for the periodical composite structural-acoustic problem.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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