Finite element simulation of sound propagation concerning meteorological conditions

Nomura, Takashi; Takagi, Kenshiro; Sato, Shin

doi:10.1002/fld.2444

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…Finite element methods were used in 'Finite Element Simulation of Sound Propagation Concerning Meteorological Condition' [49]. The study was useful in that it presented situations in which propagation was coupled with atmospheric effects such as wind and temperature gradients.…”

Section: In 'A 3d Parabolic Equation Methods For Wind Turbine Noise Propagation In Moving Inhomogenousmentioning

confidence: 99%

Wind Turbine Sound Propagation Using A Finite-Difference Time-Domain Method

Wrobel¹

2021

Preprint

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Energy usage is on the rise in both Canada and the United States. Because of this, there is a growing demand and strain on the current infrastructure. More importantly though, there is a strong demand for the use of renewable energy sources to meet this demand. One of the most popular renewable energy sources at this time is the wind turbine. In Ontario, there are plans to implement a significant number of them throughout the province. There are concerns though from residents in the vicinity of them that they cause too much noise, as well as health issues. However, some argue that these complaints stem from incorrectly calculated setback distances due to the lack of use of a detailed sound propagation model. In this study, a sound propagation model was developed using a Finite-Difference Time-Domain method, for a three dimensional computational domain, and simulated using data for a Siemens SWT-2.3-101 wind turbine. The simulations produced data of the sound propagation characteristics of each emitted wave, for each tested case. The model was developed as a starting point and building block for the eventual use in simulations of large domains and complex flow phenomena.

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Section: In 'A 3d Parabolic Equation Methods For Wind Turbine Noise Propagation In Moving Inhomogenousmentioning

confidence: 99%

Wind Turbine Sound Propagation Using A Finite-Difference Time-Domain Method

Wrobel¹

2021

Preprint

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“…Another way to deal with the computational issue is to use a hybrid approach in which the FEM will be applied in the low frequency range while for the higher frequencies more standard approaches will be used. FEM can also be applied in the time domain [99] for the extraction of a variety of acoustic parameters, can incorporate the effect of ground (e.g., by assigning acoustic impedance characteristics to the ground surface) [100], can model successfully the meteorological conditions [101] and since it requires discretization of the whole domain it can model an inhomogeneous atmosphere incorporating the effects of refraction [102]. A discussion of wave based methods used for microscale urban acoustic modeling can be found in [103].…”

Section: Future Work and Further Applications Of Fem For Noise Barriers And Microscale Urban Acoustic Modelingmentioning

confidence: 99%

Finite Element Method for the Estimation of Insertion Loss of Noise Barriers: Comparison with Various Formulae (2D)

Papadakis

Stavroulakis

2020

Urban Science

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Noise barriers are a critical part of noise mitigation in urban and rural areas. In this study, a comparison of the insertion loss calculations of noise barriers via the Finite Element Method (FEM) and various formulae (Kurze–Anderson, ISO 9613-2/Tatge, Menounou) is presented in the case of two-dimensional acoustic radiation problems. Some of the cases explored include: receiver in the illuminated zone, in the shadow zone, in the shadow border, source in medium, long, short distance from the barrier, source and receiver near barrier, and source above the barrier. Comparisons of the results indicate that FEM results comply well (less than 1 dB in each case) with Menounou’s formula which in turn complies with the analytic solution (MacDonald Solution). In certain cases, the differences between FEM and Menounou’s formula compared to Kurze–Anderson and ISO 9613-2/Tatge formulae are substantial (source and receiver near the barrier (10 dB) and source near the barrier and receiver in the shadow border (5 dB)). Similar differences are also confirmed by the analytic solution. The findings suggest that FEM can be applied effectively for the precise estimation of the insertion loss of noise barriers. Especially in cases where ISO 9613-2 formula shows large deviations from the analytic solution (e.g., near barrier), possible applications may arise in cases such as balconies, facades, etc. Furthermore, the study supports the idea that FEM could possibly be effectively utilized in real life applications for microscale urban acoustic modeling as a viable alternative to expensive noise prediction software.

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“…Other numerical methods, including Finite Element Method [14,15], Boundary Element Method [16], Pseudo Spectral Time Domain [17,18], and Transmission Line Matrix (TLM) [19,20,21], face similar challenges in scalability.…”

Section: Prior Workmentioning

confidence: 99%

Analytic ray curve tracing for outdoor sound propagation

Yeh

Manocha

2016

Applied Acoustics

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Outdoor sound propagation, which propagates sound through inhomogeneous, moving media with complex obstacles, presents challenging scenarios for computational simulation. In this paper, we present a ray-tracing method that uses analytic ray curves as tracing primitives in order to improve the efficiency of outdoor sound propagation in fully general settings. This ray-curve tracer inherits the efficiency and flexibility of rectilinear ray tracers in handling boundary surfaces, and it overcomes the performance limitations imposed by approximating the curved propagation paths in inhomogeneous media with rectilinear rays. Adaptive media traversal, as well as acceleration structures for surfaces intersections, lead to further savings in computation. Our method's speedup over existing ray models, at least an order of magnitude for simple 2D scenarios and up to two orders of magnitude for 3D complex scenes, is demonstrated on outdoor benchmark scenes.

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Finite element simulation of sound propagation concerning meteorological conditions

Cited by 4 publications

References 22 publications

Wind Turbine Sound Propagation Using A Finite-Difference Time-Domain Method

Wind Turbine Sound Propagation Using A Finite-Difference Time-Domain Method

Finite Element Method for the Estimation of Insertion Loss of Noise Barriers: Comparison with Various Formulae (2D)

Analytic ray curve tracing for outdoor sound propagation

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