Essays about: "vibrational test"

Showing result 6 - 10 of 15 essays containing the words vibrational test.

  1. 6. IR spectroscopy for vibrational modes : A semi-classical approach based on classical electrodynamicsand modern quantum mechanics

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Ulf Oreborn; [2018]
    Keywords : ;

    Abstract : The atoms of a molecule are always restless and are constantly moving in one way or another.Apart from rotations and translations, they may vibrate in many different modes. They may moveradially toward or from each other, so called stretching. This can be done symmetrically or asymmetrically. READ MORE

  3. 7. A comparative study regarding weakly stationarity assumptions and time dependency : Signal processing of vibrational loading and its influence on fatigue life

    University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Author : Rikard Dahlman; Ebba Johansson; [2018]
    Keywords : Stationarity; Test for weakly stationarity; Reverse arrangements test; Runs test; Signal processing; Fatigue life; Time dependency; Piecewise weakly stationary.;

    Abstract : Simplifications regarding calculations of fatigue life due to vibrational loading is based on weakly stationarity assumptions which is a time independent method. The hypothesis was based on the uncertainty of these assumptions. The aim of this study was to examine whether the analysed data fulfilled the assumptions of weakly stationarity. READ MORE

  4. 8. FTIR- och Ramanspektroskopi som analysmetod för den kemiska sammansättningen av granved : en jämförelse

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Edward Carlsson; Douglas Kärrholmen; [2018]
    Keywords : vibrationsspektroskopi; korsvalidering; vedkemi; absorbtion; närinfraröd;

    Abstract : Den kemiska sammansättningen har en central påverkan på egenskaper och användningsområden för trä. För att kunna uppfylla dagens krav för vedens kemiska sammansättning krävs billiga och effektiva analysmetoder. READ MORE

  5. 9. Experimental and numerical fluid-structure interaction analysis of a suspended rod subjected to forced vibrations

    University essay from KTH/Marina system

    Author : David Ahlsén; [2018]
    Keywords : ;

    Abstract : This study is evaluating Solid-Acoustic Finite Element modelling as a method for calculating structural vibration response in water. When designing for example vehicles, it is important to avoid vibrational resonance in any part of the structure, as this causes additional noise and reduced lifespan. READ MORE

  6. 10. Methodology and vibrational analysis for measurements on a VTOL RAPS

    University essay from Linköpings universitet/Fluida och mekatroniska system

    Author : Dino Krantz; [2017]
    Keywords : Experimental modal analysis; impact hammer test; methodology; structural vibration; RPAS; VTOL; Certification;

    Abstract : In this thesis a methodology for measuring vibrations has been produced andinvestigated for APID 60, a rotorcraft in a Vertical Take-off and landing remotelypiloted aircraft system (VTOL RPAS). A comparative study was carried out forthe purpose of identifying the methodology with respect to design modificationscommon to the APID 60. READ MORE