Sökning: "vibroacoustic analysis"

Hittade 4 uppsatser innehållade orden vibroacoustic analysis.

  1. 1. Vibroacoustic Analysis of an OLTC Diverter Switch for Condition Monitoring : Time frequency analysis with Fourier and wavelet transform in combination with multivariate logistic regression for condition monitoring of OLTC diverter switch

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

    Författare :Simon Persson; [2023]
    Nyckelord :Wavelet transform; CWT; logistic regression; machine learning; ML; vibroacoustic analysis; time frequency analysis; tap changer; diverter switch; power transformer; classification; prediction; condition; vibrations; state prediction; Hitachi Energy;

    Sammanfattning : Vibrations are everywhere around us all the time and we often recognise them as sounds that we can hear and analyse with our brain. In this thesis, data that has been gathered from a diverter switch (DS) in a controlled environment, is analysed. LÄS MER

  3. 2. Utilisation of hardwood in cross-laminated timber - A numerical study on vibrations in floors

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Johannes Jonasson; Olle Karlsson; [2022]
    Nyckelord :hardwood; birch; beech; clt; cross-laminated timber; vibrations; floors; footfall; accelerations; Technology and Engineering;

    Sammanfattning : Cross-laminated timber (CLT) is an engineered wood product consisting of several layers of laminations bonded together with adhesives. In contrast to heavier construction materials, timber and other lightweight building materials are more prone to serviceability issues due to vibrations. LÄS MER

  4. 3. FEM modelling of sound reduction index in partition CLT wall

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för byggvetenskaper; Lunds universitet/Teknisk akustik

    Författare :Adam Hultin; Erik Hörström; [2020]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Constructing buildings with wood brings many advantages, especially regarding environmental aspects, which has brought an up-rise in these types of structures. However, one of the main issues regarding wooden structures is its tendency to perform poorly acoustically in lower frequencies compared to heavier structures. LÄS MER

  5. 4. Vibroacoustic Analyses

    Master-uppsats, KTH/Flygdynamik

    Författare :Flavien Saenz Molina; [2017]
    Nyckelord :;

    Sammanfattning : The study of vibrations of structures is paramount in the aerospace industry, as parts are subjected to important dynamic loads. A vibroacoustic analysis of structures is thus undergone in order to ensure that they can withstand the acoustic environment. LÄS MER