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Wyszukujesz frazę "noise reduction" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Use of Acoustic Camera for Noise Sources Localization and Noise Reduction in the Industrial Plant
    Autorzy:
    Fiebig, Wiesław
    Dąbrowski, Damian
    Powiązania:
    https://bibliotekanauki.pl/articles/178071.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    noise source localization
    noise reduction
    industrial noise control
    acoustic camera
    Opis:
    The paper presents results of the localization of main noise sources in the industrial plant. Identification of main noise sources was made with an acoustic camera using Beamforming Method. Parallel to the measurements by means of the acoustic camera, sound level measurements on the main noise sources have been performed. Based on the calculations, prediction regarding the noise emission at residential buildings located near to the plant has been determined. Acoustic noise maps have been performed with LEQ Professional software, which includes the 3D geometry of the buildings inside the plant. It has been established that, after introduction of noise reduction measures in the plant, the noise levels at the observation points in the residential area meets the limit values.
    Źródło:
    Archives of Acoustics; 2020, 45, 1; 111-117
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field Experiment as a Tool to Verify The Effectiveness of Prototype Track Structure Components Aimed at Reducing Railway Noise Nuisance
    Autorzy:
    Kraśkiewicz, Cezary
    Klekot, Grzegorz
    Książka, Piotr
    Zbiciak, Artur
    Mossakowski, Przemysław
    Chacińska, Patrycja
    Al Sabouni-Zawadzka, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/31339754.pdf
    Data publikacji:
    2024
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    vibroacoustic isolator
    ballasted track structure
    ballastless track structure
    noise reduction
    field test.
    Opis:
    The almost unlimited possibilities of modern computational tools create the temptation to study phenomena related to the operation of engineering objects exclusively using complex numerical simulations. However, the fascination with multi-parametric complex computational models, whose solutions are obtained using iterative techniques, may result in qualitative discrepancies between reality and virtual simulations. The need to verify on real objects the conclusions obtained from numerical calculations is therefore indisputable. The enormous cost and uniqueness of large-scale test stands significantly limit the possibility of conducting tests under real conditions. The solution may be an experiment focused on testing features relevant to the given task, while minimising the dimensions of the objects under consideration. Such conditions led to the concept of conducting a series of field experiments to verify the effectiveness of prototype track components, which were developed using numerical simulations to reduce the noise caused by passing trains. The main aim of this study is to examine the acoustic efficiency of prototype porous concrete sound absorbing panels, in relation to the ballasted and ballastless track structures. Presented results of the proposed unconventional experiments carried out on an improvised test stand using the recorded acoustic signals confirm the effectiveness of the developed vibroacoustic isolators.
    Źródło:
    Archives of Acoustics; 2024, 49, 1; 61-71
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Attenuation Characteristics of Vibration in a Locally Resonant Phononic Crystal Frame Structure
    Autorzy:
    Wang, Yukun
    Qian, Denghui
    Wu, Jinghong
    He, Feiyang
    Powiązania:
    https://bibliotekanauki.pl/articles/176756.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    LRPC frame structure
    high-rise building
    finite element method
    vibration insulation
    noise reduction
    Opis:
    In this paper, a frame structure based on the locally resonant (LR) mechanism of phononic crystals (PCs) is designed on account of the wide application of frame structures in high-rise buildings, and the band structures, displacement fields of eigenmodes, and transmission power spectrums of corresponding finite structure are calculated by finite element (FE) method. Numerical results and further analysis demonstrate that a full band gap with low starting frequency can be opened by the frame structure formed by periodically combining soft and hard materials, and the starting frequency can be further lowered with the adjustment of corresponding geometric parameters, which provides a theoretical basis for the studies on vibration insulation and noise reduction of high-rise buildings.
    Źródło:
    Archives of Acoustics; 2020, 45, 3; 557-562
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sound Field Modelling and Noise Reduction for a Forklift Power Compartment Based on Perfectly Matched Layer and Acoustic Packaging Design
    Autorzy:
    Zhang, Enlai
    Liu, Zhiqi
    Zhang, Jingjing
    Lin, Jiahe
    Powiązania:
    https://bibliotekanauki.pl/articles/1945640.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    forklift power compartment
    sound field modelling
    perfectly matched layer
    acoustic packaging design
    noise reduction
    Opis:
    The core goal of this paper is to put forward a feasible scheme of noise reduction for a target forklift on the basis of solving the problem of vibration and acoustic radiation from complex structures in infinite domain. Based on the previous report and vibration acceleration tests, the acoustic virtual wind tunnel model of forklift power compartment was established using finite element method and boundary element method, in which the perfectly matched layer was first applied to simulate the attenuation propagation of sound waves in air. In addition, according to the distribution characteristics of sound pressure field with different frequencies, the acoustic energy mainly radiated through the bottom and right side, and concentrated in the low frequency. Consequently, the acoustic packaging design for the whole forklift power compartment was presented, and a satisfying noise reduction effect was achieved.
    Źródło:
    Archives of Acoustics; 2021, 46, 3; 491-498
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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