scholarly journals Passive time-domain numerical models of viscothermal wave propagation in acoustic tubes of variable cross section

2016 ◽  
Vol 140 (1) ◽  
pp. 728-740 ◽  
Author(s):  
Stefan Bilbao ◽  
Reginald Harrison
Keyword(s):  
Wave Propagation ◽  
Cross Section ◽  
Time Domain ◽  
Numerical Models ◽  
Variable Cross Section ◽  
Variable Cross

Stress Wave Propagation Analysis in One-Dimensional Micropolar Rods with Variable Cross-Section Using Micropolar Wave Finite Element Method

2018 ◽  
Vol 10 (04) ◽  
pp. 1850039 ◽  
Author(s):  
Mohsen Mirzajani ◽  
Naser Khaji ◽  
Muneo Hori
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wave Propagation ◽  
Cross Section ◽  
Variable Cross Section ◽  
Stress Wave Propagation ◽  
Rotational Degree ◽  
Variable Cross ◽  
One Dimensional ◽  
Element Method

The wave finite element method (WFEM) is developed to simulate the wave propagation in one-dimensional problem of nonhomogeneous linear micropolar rod of variable cross-section. For this purpose, two kinds of waves with fast and slow velocities are detected. For micropolar medium, an additional rotational degree of freedom (DOF) is considered besides the classical elasticity’s DOF. The proposed method is implemented to solve the wave propagation, reflection and transmission of two distinct waves and impact problems in micropolar rods with different layers. Along with new solutions, results of the micropolar wave finite element method (MWFEM) are compared with some numerical and/or analytical solutions available in the literature, which indicate excellent agreements between the results.

Numerical Simulation of Wave Propagation in Variable Cross-Section Bars

2011 ◽  
Vol 378-379 ◽  
pp. 72-76 ◽  
Author(s):  
Hong Bin Jin
Keyword(s):  
Numerical Simulation ◽  
Wave Propagation ◽  
Cross Section ◽  
Analytical Solutions ◽  
Simulation Method ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Numerical Simulation Method ◽  
Simulation Results

A model for wave propagation in variable cross-section bars is developed. Then a numerical simulation method based on CSPM is introduced. Furthermore the wave propagations in stepped bars and conical bars are simulated. The simulation results agree well with the analytical solutions, which demonstrate that the model can describe the wave propagation in variable cross-section bars precisely.

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