Sökning: "dynamic excitation"

Visar resultat 16 - 20 av 45 uppsatser innehållade orden dynamic excitation.

  1. 16. Dynamics of staircases : A case study to improve finite element modeling

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Lisa Andersson; [2017]
    Nyckelord :staircase; dynamics; natural frequency; vibration analysis; human introduced loads; FE-modeling; trappa; dynamik; egenfrekvens; vibrationsanalys; dynamiska laster; FE-modellering;

    Sammanfattning : Vibrations in staircases have during the last decades become an important issue in design. The main reasons are current architectural trends aiming for innovative, slender and high staircases, together with developments in material properties and building technique, making these aims possible. LÄS MER

  3. 17. Estimation of Inertial Parameters for Automatic Leveling of an Underwater Vehicle

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Feras Faez Elias; [2017]
    Nyckelord :Static parameter estimation; Proposal on balancing; Dynamic parameter estimation; Underwater vehicle;

    Sammanfattning : The use of underwater systems has grown significantly, and they can be used both for military and civilian purposes. Many of their parts are replaceable. An underwater vehicle can be equipped with different devices depending on the taskit should carry out. LÄS MER

  4. 18. Dynamic Simulation of a One-Cylinder Engine Test Rig

    Master-uppsats, KTH/Hållfasthetslära (Inst.)

    Författare :Per Sundström; [2017]
    Nyckelord :;

    Sammanfattning : An engine test rig at AVL was redesigned with new components after a failure. The new system consists of a torsional vibration damper, a cardan axle, a torque flange, and an adapter unit, together with a new dynamometer. To ensure another failure would not occur a study of the new system was conducted. LÄS MER

  5. 19. Dynamic analysis of high-rise timber buildings : A factorial experiment

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Victor Karlberg; [2017]
    Nyckelord :Acceleration; comfort criteria; cross-laminated timber; factorial design; finite element analysis; natural frequency; vibrations; Acceleration; komfortkrav; korslimmat trä; faktorförsök; finita elementmetoden; naturlig egenfrekvens; vibrationer;

    Sammanfattning : Today high-rise timber buildings are more popular than ever and designers all over the world have discovered the beneficial material properties of timber. In the middle of the 1990’s cross-laminated timber (CLT), was developed in Austria. CLT consists of laminated timber panels that are glued together to form a strong and flexible timber element. LÄS MER

  7. 20. Evaluation of a Contactless Excitation and Response System (CERS) for process planning applications : An experimental study

    Master-uppsats, KTH/Industriell produktion

    Författare :Laura Montalban; [2016]
    Nyckelord :mechanical vibrations; natural frequencies; damping ratio; chatter; structural dynamic tests; stability lobe diagrams.; mekaniska vibrationer; egenfrekvens; dämpning; chatter; strukturdynamiska tester; stabilitetsdiagram.;

    Sammanfattning : Chatter vibration is a common problem for the manufacturing industry that limits the productivity, accuracy and surface quality of machined parts. This study is focused on the out of process methods, such as Stability Lobe Diagrams (SLD), that ensure the selection of the optimal cutting parameters in which the machining process is stable. LÄS MER