Noise Reduction Effect of Noise Barrier for Shinkansen Based on Y-shaped Structure

Murata, Kazuya; Nagakura, Kiyoshi; Kitagawa, Toshiki; Tanaka, Shin-Ichi-Ro

doi:10.2219/rtriqr.47.162

Cited by 8 publications

(4 citation statements)

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“…Fifth, new coupling methods should be developed to consider the coupling effect between HSTs and roadside buildings by integrating them with 3D parametric modelling and optimization calculations to obtain the optimal shape of HST heads. Current researches on the aerodynamic performance of the train head mainly focus on one single object, such as the shape of the train head as we discussed in this paper; the height and position of the windbreak wall; 45,46 the shape of noise barrier; 47,48 the height, width, and cross-sectional area distribution of the bridge; 49 and the structure of the tunnel portal geometry. [50][51][52] However, the aerodynamic effect is an interaction of all these factors.…”

Section: Conclusion and Discussion About Potential Research Directionsmentioning

confidence: 99%

A survey of parametric modelling methods for designing the head of a high-speed train

Wang

Zhang

Bian

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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With the continuous increase of the running speed, the head shape of the high-speed train (HST) turns out to be a critical factor for further speed boost. In order to cut down the time used in the HST head design and improve the modelling efficiency, various parametric modelling methods have been widely applied in the optimization design of the HST head to obtain an optimal head shape so that the aerodynamic effect acting on the head of HSTs can be reduced and more energy can be saved. This paper reviews these parametric modelling methods and classifies them into four categories: 2D, 3D, CATIA-based, and mesh deformation-based parametric modelling methods. Each of the methods is introduced, and the advantages and disadvantages of these methods are identified. The simulation results are presented to demonstrate that the aerodynamic performance of the optimal models constructed by these parametric modelling methods has been improved when compared with numerical calculation results of the original models or the prototype models of running trains. Since different parametric modelling methods used different original models and optimization methods, few publications could be found which compare the simulation results of the aerodynamic performance among different parametric modelling methods. In spite of this, these parametric modelling methods indicate more local shape details will lead to more accurate simulation results, and fewer design variables will result in higher computational efficiency. Therefore, the ability of describing more local shape details with fewer design variables could serve as a main specification to assess the performance of various parametric modelling methods. The future research directions may concentrate on how to improve such ability.

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Section: Conclusion and Discussion About Potential Research Directionsmentioning

confidence: 99%

A survey of parametric modelling methods for designing the head of a high-speed train

Wang

Zhang

Bian

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Combination of tire rubber, PVC grains and nylon fibers with polyurethane as a binder resulted in good absorption coefficient [23]. Another way to improve the performance of noise barrier was to modify its shape by using additional elements on the top of barrier, made from different material, like T-shaped and Y-shaped caps [24,25], cylindrical caps [26,27], multiple-edge caps [28] and tilted caps [29]. All of these design variants changed the effective acoustic length of the barrier or modified the diffraction points of the screen.…”

Section: Introductionmentioning

confidence: 99%

Airborne sound transmission in fluted PVC panels-properties of materials and structures

Kopania

Zakrzewicz

Kubiak

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Authors present a study on transmission loss and absorption of corrugated PVC panels. Tests were conducted in reverberation room and it has been proven, both theoretically and experimentally, that there is a relationship between the panel type and its transmission loss and absorption. Panel size and thickness was also taken into consideration during testing procedure. Analyses also show that the Hansen model was not perfectly accurate when predicting the transmission loss for some of the tested samples.

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“…Some researches on the effectiveness of barriers with a sloping top (known as L and J shape barriers) were found as well. While applying a numerical model, Okubo and Yamamoto (2007), Murata et al (2006) proved that barriers with sloping tops were superior to straight barriers of the same height. Chinese researchers Xintan et al (2005) made theoretical calculations and described the effect of the inclined top on sound wave diffraction (while constructing the L shape barrier) as a factor for changing the position of a barrier in respect of the noise source.…”

Section: Introductionmentioning

confidence: 99%

The Research on the Effectiveness of the Inclined Top Type of a Noise Barrier / Triukšmo Slopinimo Sienelės Viršutinės Dalies Polinkio Efektyvumo Tyrimai

Venckus

Grubliauskas

Venslovas

2012

Journal of Environmental Engineering and Landscape Management

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Journal of Environmental Engineering and Landscape ManagementPublication details, including instructions for authors and subscription information:Abstract. Now, it is normally agreed that noise barriers -shields with appropriate devices on the top edge -limit the diffraction of sound waves more effectively than the usual shields of the equal or in some cases even greater height. These barriers are referred to as "edge-modified" noise shields. The article describes acoustic field researches that estimate the impact of the slope of the upper edge of the noise barrier on the effectiveness of shielding from environmental noise. The article was drafted on the basis of methodical recommendations presented in the standard ISO 11821: 1997 "Acoustics -Measurement of the in situ sound attenuation of a removable screen". While altering the slope angle, respectively to 90°, 120°, 150°, 180°, different noise barriers were formed: "L90" (slope angle 90°), "J120", "J150" (slope angles 120° and 150°), and the usual "straight type" (slope angle 180°). The impact made by the form of the noise barrier on the spread of noise in the noise suppression area was observed at the areas of low (100-315 Hz) and high (2000-5000 Hz) frequency. The most effective form of a barrier in reducing the diffraction of low frequency sound waves was "J120", whereas high frequency sound waves were most effectively reduced using a usual straight noise barrier.

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Noise Reduction Effect of Noise Barrier for Shinkansen Based on Y-shaped Structure

Cited by 8 publications

References 0 publications

A survey of parametric modelling methods for designing the head of a high-speed train

A survey of parametric modelling methods for designing the head of a high-speed train

Airborne sound transmission in fluted PVC panels-properties of materials and structures

The Research on the Effectiveness of the Inclined Top Type of a Noise Barrier / Triukšmo Slopinimo Sienelės Viršutinės Dalies Polinkio Efektyvumo Tyrimai

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