Sökning: "experimentell modal analys"

Hittade 4 uppsatser innehållade orden experimentell modal analys.

  1. 1. 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

  3. 2. Dynamic Analysis of an Automotive Power Transfer unit : Towards prediction of TE and housing vibrations

    Master-uppsats, KTH/Maskinkonstruktion (Avd.)

    Författare :Nikhil Maharshi Kosaraju; [2019]
    Nyckelord :Power transfer unit PTU ; Multi-Body Simulation MBS ; Transmission Error; Gear NoiseVibration; Modal Analysis; Vinkelväxlen PTU ; Multi-Body Simulering MBS ; transmissionsfel TE ; Växelljud och vibrationer; Modal analys;

    Sammanfattning : This work describes the use of Multi-Body Simulation (MBS) to create a virtual prototype of a geared drive called Power transfer unit (PTU). PTU is a subsystem of the all-wheel drive driveline responsible for transfer of power between front and rear axles in an Automobile. LÄS MER

  4. 3. Analytic, Simulation and Experimental Analysis of Fluid-Pipe Systems

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Siddharth Venkataraman; [2018]
    Nyckelord :fluid-structure interaction; modal interaction model; viscosity;

    Sammanfattning : Inviscid fluid inside thin pipe system is first analytically solved for eigenfrequencies and eigenmodes using Modal Interaction Model method with fluid-structure interaction condition at boundary. Shear-diaphragm boundary condition is used for comparing and validating Analytic results with Simulation using COMSOL Multiphysics. LÄS MER

  5. 4. Pilot Testing of a Hydraulic Bridge Exciter

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Richard Borg; Olivier Dymén; [2015]
    Nyckelord :Hydraulic bridge exciter; controlled excitation; modal testing; experimental modal analysis; railway bridges; measurements; load shaker; FEM; FE-modelling; script; Hydraulisk broexciterare; kontrollerad excitering; modala tester; experimentell modal analys; järnvägsbroar; mätningar; lastexciterare; FEM; FE-modellering; script;

    Sammanfattning : In the design of a railway bridge that is meant for train speeds larger than 200 km/h, the Swedish Traffic Administration requires a dynamic analysis in addition to the conventional static design. The models used for static design may not always be suitable for dynamic analysis, which could lead to inaccurate estimations of the dynamic response. LÄS MER