Sökning: "Vibration dynamics"

Visar resultat 1 - 5 av 54 uppsatser innehållade orden Vibration dynamics.

  1. 1. Impact of Frame Stiffness on Tribological Behaviour of Sliding Interfaces

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Nisha Singh; [2023]
    Nyckelord :coefficient of friction; friction-vibration interaction; stiffness; tribometer; vibrations; friktionskoefficient; friktion-vibrationsinteraktion; styvhet; tribometer; vibrationer;

    Sammanfattning : Friction and wear have been concerns to industrialists, scientists and environmentalist for several decades. Many robust models have been developed to address friction and wear and their dependency on various parameters. Numerous experiments have been conducted in the past to model friction and wear. LÄS MER

  3. 2. Multibody simulations of vibrations in a truck’s steering system

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Marcus Didenbäck; [2023]
    Nyckelord :Multibody simulation; Vibrations; Stiff differential equations; Equations of motion; Lagrange; Vehicle dynamics; Adams; Flerkroppssimulering; Vibrationer; Styva differentialekvationer; Rörelseekva-tioner; Lagrange; Fordonsdynamik; Adams;

    Sammanfattning : This thesis aims to explore if multibody simulations is a suitable method to investigate vibrations in the steering system of trucks. Vibrations in the steering system and subsequently in the steering wheel is a common issue that automotive manufacturers face. LÄS MER

  4. 3. CFD Analyses for Wind Load AssessmentCFD Analyses for Wind Load Assessment : Wind-induced vibrations in the Bomarsunds Bridge hangers

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Fatiha El Azrak; [2023]
    Nyckelord :;

    Sammanfattning : The trend in recent years of building longer and slender bridge components has introduced new challenges to ensure their stability and strength. This master thesis focuses on the effects of wind-induced vibrations in the context of long, slender arch bridge components, particularly the recently constructed Bomarsunds Bridge in Åland, Finland. LÄS MER

  5. 4. Time-resolved x-ray diffraction study of longitudinal optical phonons in zincblende semiconductors

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Lassi Linnala; [2022]
    Nyckelord :femtosecond THz radiation; ultrafast x-ray diffraction; pump-probe; longitudinal optical phonons; zincblende semiconductors; anharmonic decay; density functional perturbation theory; Physics and Astronomy;

    Sammanfattning : Anharmonic decay of longitudinal optical (LO) phonons in zincblende semiconductors is not at present well characterized due to the polar and many-body nature of the problem. Femtosecond THz radiation offers a novel route to this study, as the interaction of this radiation is directly with the phonon lattice and these THz excited phonons do not have enough energy to excite electrons over the band gap. LÄS MER

  7. 5. Simulations of anisotropic vibrations in ice induced by a laser

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Victor Freedman; [2022]
    Nyckelord :ice; anisotropy; laser; freedman; molecular dynamics; simulations;

    Sammanfattning : Systems of atoms have their kinetic energy distributed between three parts: translation, rotation and vibration. These are usually kept about the same following a Maxwell distribution, but under certain circumstances, this equilibrium might break. This would lead to, for example, ice melting anisotropically. LÄS MER