Sökning: "human induced vibrations"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden human induced vibrations.

  1. 1. Hydroacoustic Modelling of Podded Propulsion System : Underwater Radiated Noise Prediction Using ANSYS

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Martin Persson; [2022]
    Nyckelord :Fluid Mechanics; Computational Aeroacoustics; Frequency Response; Noise and Vibration; Pod; Propulsion System; ANSYS; Reynolds-Averaged Navier-Stokes Equations; Kongsberg Maritime Sweden AB;

    Sammanfattning : Ocean noise pollution is an invisible but growing threat. There are many sources of sound in the ocean but human underwater radiated noise, in particular from shipping is one of the most prominent one. Ocean noise pollution can interfere or sometimes even directly harm marine life. LÄS MER

  3. 2. Attenuation of structure-borne vibrations induced by trains passing railway switches

    Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWL

    Författare :Fredrik Lindström; [2020]
    Nyckelord :;

    Sammanfattning : The study of structure-borne vibrations caused by railway traffic is becoming increasingly relevant along with the expansions of cities, as building projects are forced towards more sensitive areas, e.g closer to railway tracks. With high enough vibration levels, there is a risk for human annoyance inside buildings. LÄS MER

  4. 3. Response of Footbridges equipped with TLD : A numerical and experimental assessment

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Silhady Tshitende Luboya; [2020]
    Nyckelord :Tuned liquid damper; tuned mass damper; dynamic analysis; dynamics evaluation; vibration; footbridge; human-induced vibrations; parametric study; serviceability; assessment.;

    Sammanfattning : In recent years, an increase to design slender and aesthetically-pleasing structures have resulted in some structures having a low natural frequency. This is because the design calculation did not meet the requirement of serviceability performance. LÄS MER

  5. 4. Dynamic analyses of hollow core slabs : Experimental and numerical analyses of an existing floor

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Markus Hansell; Panagiotis Tamtakos; [2020]
    Nyckelord :Hollow core slab; Structural dynamics; Signal analysis; Mode shape; Frequency response function; Complex mode; FE-model; Håldäcksbjälklag; Strukturdynamik; Signalanalys; Modform; Frekvenssvar; Komplex mod; FE-modellering.;

    Sammanfattning : For intermediate floors in residential and office buildings, as well as in parking garages and malls, there is a wide use of hollow core concrete slabs in Sweden today. Hollow core slabs are precast and prestressed concrete elements with cylindrical-shaped voids extending along the length of the slab. LÄS MER

  7. 5. Transmission of Vibrations in Precast Concrete Slabs

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Adam Oskarsson; [2020]
    Nyckelord :Vibration; Concrete; Transmission; Precast;

    Sammanfattning : Dynamic loads have historically not been a troubled area for concrete floors, foremostbecause of the high self-weight compared to the dynamic load. With new technical andcalculation achievements during the last decades concrete floors have become longerand more slender. LÄS MER