Sökning: "random vibration"

Visar resultat 16 - 20 av 25 uppsatser innehållade orden random vibration.

  1. 16. Stress simulation of the SEAM CubeSat structure during launch

    Master-uppsats, KTH/Hållfasthetslära (Inst.)

    Författare :Fagerudd Julie; [2015]
    Nyckelord :satellite; launch; random vibration; shock; finite element analysis;

    Sammanfattning : A spacecraft is subjected to dynamic and static loads during launch. These loads are deterministic and of random nature and cannot be tested under the real conditions due to cost considerations. LÄS MER

  3. 17. Modal Testing and Structural Identification

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

    Författare :Tobias Kristensson; [2014]
    Nyckelord :Modal testing; Modal analysis; Structural identification; Vibration; Signal; EMA; OMA; Technology and Engineering;

    Sammanfattning : Bridges have been built around the world for at least 3000 years and have made it possible for man to travel over obstacles like valleys and rivers, which has contributed to the rapidly growing infrastructure we have today. Efforts made to save materials and reduce production costs have led to lighter and slender structures, which in turn can cause dynamic problems where the bridge is sensitive to vibrations. LÄS MER

  4. 18. Statistical Assessment of Uncertainties Pertaining to Uniaxial Vibration Testing and Required Test Margin for Fatigue Life Verification

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Davood Dehgan Banadaki; Sunay Sami Durmush; Sharif Zahiri; [2013]
    Nyckelord :Vibration Testing; FEA; Natural Frequency; Deterministic and Random Vibrations; Fatigue;

    Sammanfattning : In the automotive industry uniaxial vibration testing is a common method used to predict the lifetime of components. In reality truck components work under multiaxial loads meaning that the excitation is multiaxial. A common method to account for the multiaxial effect is to apply a safety margin to the uniaxial test results. LÄS MER

  5. 19. Metodik för utmattningsberäkning av svets i vibrationsmiljö

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Elias Richloow; [2012]
    Nyckelord :;

    Sammanfattning : In this work, a method was developed and evaluated for calculating the life of welds under the influence of fatigue loads from a vibration environment. Typically, a shaker table is used for testing a component against vibration loads. The shaker table creates a vibration environment that is defined in the frequency domain by a power spectrum. LÄS MER

  7. 20. Transportation Excellence for Wind Turbine Nacelle

    Master-uppsats, KTH/Industriell produktion

    Författare :Ganesh Babu Thennarasu; Hemanth Kumar Annamalai Muralidharan; [2012]
    Nyckelord :Wind turbine; nacelle; transportation; humidity; shock;

    Sammanfattning : With the growing demand of renewable wind energy, logistics and operations associated with a wind turbine makes for compelling study and analysis. The study entails understanding of transporting a wind turbine nacelle from Denmark till Australia. LÄS MER