Spectral element analysis of sound propagation in a muffler

This paper investigates the effect of tire width to tire-pavement noise. A tire-pavement noise numerical model in the near field has been developed using the three-dimensional finite-element method, and performed in the standard FEM code package ADINA. The model is composed of two main components: a rolling tire pavement interaction model and a sound propagation model. The tire width studied ranged from 180 to 210 mm. The computer simulation model was calibrated and validated using experimental results made available from past research. From the simulation results, it was found that tire width has a noticeable effect on tire-pavement noise. In particular, it was found that tires with wider base were found to produce higher noise levels.

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Spectral Element Analysis of Composite Patched Beam

The Proceedings of the 2nd International Conference on Industrial Application Engineering 2014 ◽

10.12792/iciae2014.010 ◽

2014 ◽

Author(s):

Ilwook Park ◽

Usik Lee

Keyword(s):

Spectral Element ◽

Element Analysis

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A least-squares spectral element method for sound propagation in acoustic ducts

The Journal of the Acoustical Society of America ◽

10.1121/1.423902 ◽

1998 ◽

Vol 104 (5) ◽

pp. 3111-3114 ◽

Cited By ~ 12

Author(s):

Wen H. Lin

Keyword(s):

Least Squares ◽

Spectral Element Method ◽

Sound Propagation ◽

Spectral Element ◽

Acoustic Ducts ◽

Element Method

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SPECTRAL ELEMENT METHOD FOR ACOUSTIC PROPAGATION PROBLEMS BASED ON LINEARIZED EULER EQUATIONS

Journal of Computational Acoustics ◽

10.1142/s0218396x09004014 ◽

2009 ◽

Vol 17 (04) ◽

pp. 383-402 ◽

Cited By ~ 4

Author(s):

RONGXIN ZHANG ◽

GUOLIANG QIN ◽

CHANGYUN ZHU

Keyword(s):

Euler Equations ◽

Sound Propagation ◽

Spectral Element ◽

Acoustic Propagation ◽

Absorbing Boundary Conditions ◽

Element Approximation ◽

Newmark Method ◽

Mean Flow ◽

Linearized Euler Equations ◽

Accuracy And Stability

A Chebyshev spectral element approximation of acoustic propagation problems based on linearized Euler equations is introduced, and the numerical approach is based on spectral elements in space with first-order Clayton–Engquist–Majda absorbing boundary conditions and implicit Newmark method in time. An initial perturbation problem has been solved to test the accuracy and stability of the numerical method. Then the sound propagation by source terms is also studied, including the radiation of a monopole and dipolar source in both stationary medium and uniform mean flow. The numerical simulation leads to good results in both accuracy and stability. Compared with the analytical solutions, the numerical results show the advantages in spectral accuracy even with relatively fewer grid points. Moreover, the implicit Newmark method in time marching also presents its superiority in stability. Finally, a problem of sound propagation in pipes is simulated as well.

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