Search for dissertations about: "Vibration measurements"

Showing result 1 - 5 of 129 swedish dissertations containing the words Vibration measurements.

  1. 1. Attenuation of hand-held machine vibrations. Application of non-linear tuned vibration absorber

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Hans Lindell; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Impact machine; Hand-arm vibration; High frequency vibration; ATVA; Nonlinear tuned vibration absorber; White finger; HAVS; Transient vibration; Auto Tuned Vibration Absorber; Vibration dynamics; ISO 5349;

    Abstract : Vibration injury in the hand-arm system from vibrating hand-held machines is one of the most common occupational health injuries and causes severe and often chronic nerve and vascular injuries to the operator. The objective with this study is to contribute to reduce hand-arm vibration injuries, first by developing methods of redesigning machines that will lower their vibration level and second to study how high frequency vibrations (HFV) above 1250 Hz effect the finger tissue which are not included in the current standard for risk evaluation. READ MORE

  2. 2. Measurements, Analysis Techniques and Experiments in Sound and Vibration Applied to Operational MRI Scanners and in Remote Laboratories

    University dissertation from Karlskrona : Blekinge Tekniska Högskola

    Author : Imran Khan; Blekinge Tekniska Högskola.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Active Noise Control; Remote Laboratories; Sound and Vibration Measurements; Vibration Analysis; Vibration Transmission;

    Abstract : High quality noise and vibration measurements outside of a laboratory environment on real life structures and applications are not trivial. True boundary and operating conditions enforce unique challenges on the measurements. Measurements in hazardous situations such as high magnetic fields, and high temperature environments, etc. READ MORE

  3. 3. Truck Tyre Vibration Behaviour. Measurements and High Frequency Modelling

    University dissertation from Karlskrona : Blekinge Tekniska Högskola

    Author : Penka Dinkova; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration response; mobility measurements; truck tyre; heavy vehicle; tyre-road noise; tyre; driving point mobility; transfer mobility; tire; vibration prediction; model;

    Abstract : To facilitate tyre-road noise prediction, a computationally efficient high frequency tyre model is needed. Such models are always a compromise between the desired accuracy and the need for simplicity. In addition the accuracy of models is often limited by the quality of the input data available. READ MORE

  4. 4. Countermeasures against railway ground and track vibrations

    University dissertation from Institutionen för farkostteknik

    Author : Robert Hildebrand; KTH.; [2001]
    Keywords : ground vibration; vibration screen; track vibration; railway vibration; seismic barrier;

    Abstract : Railway track and ground vibrations are considered, with anemphasis on methods of mitigation ("countermeasures"), forapplication to wayside disturbance problems.Original field measurements from two sites in Sweden, aswell as borrowed measurements from Norway, provide vibrationresults at many points on the track, on and underneath theground surface, for a variety of trains, both with and withoutcountermeasures in-place. READ MORE

  5. 5. Vibrations in timber floors Dynamic properties and human perception

    University dissertation from Kalmar, Växjö : Linnaeus University Press

    Author : Kirsi Jarnerö; Linnéuniversitetet.; RISE.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Byggteknik; Civil engineering; wooden floor; timber floor; vibration; design criteria; damping; frequency; questionnaire; field test; socio-vibrational survey; vibration annoyance; vibration disturbance;

    Abstract : Springiness and vibrations of timber floors are familiar to many as a ‘live’ feelwhen walking on them, especially if living in single family housing with timberframework. Since the building regulations in Sweden changed to performancedependentrequirements in 1994 the use of timber in multifamily housing hasincreased. READ MORE