Sökning: "dynamic excitation"

Visar resultat 21 - 25 av 45 uppsatser innehållade orden dynamic excitation.

  1. 21. Vibrational tests of preloaded rubber vibration isolators : A cam controlled displacement excitation

    Magister-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Joanna Cierocka; Jiayue Tang; [2016]
    Nyckelord :Vibration test; Vibration isolator; Frequency response function; rubber; material properties; aging; camshaft; artificial aging;

    Sammanfattning : Vibrations are very common phenomenon. It influences structures and generates acoustic noise which might be harmful to human beings. The vibration isolator was invented to reduce the effect from vibrations. However, the behavior of rubber material, which many vibration isolators are made of, is hard to predict. LÄS MER

  3. 22. 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

  4. 23. Efficient Modeling of a Flexible Beam in Dymola using Coupled Substructures in a Floating Frame of Reference Formulation

    Master-uppsats, Lunds universitet/Mekanik

    Författare :Anders Ericsson; Anton Kjellander; [2015]
    Nyckelord :Euler Bernoulli Beam Theory; Floating Frame of Reference Formulation; Craig-Bampton Method; Flexible Bodies; Dymola; Modelica; Technology and Engineering;

    Sammanfattning : In this Master Thesis a three dimensional Euler-Bernoulli beam model was implemented in the simulation software Dymola. The beam model is based on the Floating Frame of Reference formulation combined with the Craig-Bampton method. LÄS MER

  5. 24. Inelastic Capacity of Pipe Rack Structures

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

    Författare :Adam Halvorsen Stålmarck; [2015]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Steel structures in an offshore processing environment must be designed for an accidental explosion event. The current verification procedure implemented at Aker Solutions (AKSO) enforces an elastic single degree of freedom (SDOF) analogy to implicitly account for dynamic effects in linear static FE analyses. LÄS MER

  7. 25. The length effect on Norway spruce boards : An investigation on indicating properties based on axial dynamic and edgewise bending MOEs

    Magister-uppsats, Linnéuniversitetet/Institutionen för byggteknik (BY)

    Författare :Anders Engström; Toma Sumbasacu; [2015]
    Nyckelord :length effect; dynamic modulus of elasticity; edgewise bending; indicating property; Norway spruce;

    Sammanfattning : When using timber for construction purposes it is important to know its strength. One way to do this is by sorting the boards into strength classes that are defined by European standards. LÄS MER