Sökning: "Vibration"
Visar resultat 1 - 5 av 522 avhandlingar innehållade ordet Vibration.
1. Attenuation of hand-held machine vibrations. Application of non-linear tuned vibration absorber
Sammanfattning : 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. LÄS MER
2. Floor vibration : dynamic properties and subjective perception
Sammanfattning : This thesis covers research in the floor vibration field. Although lightweight steel framed constructions have been in focus, many results are applicable to floors in common and to some extent also to vibrations in general. LÄS MER
3. Gear noise and vibration : influence of gear finishing method and gear deviations
Sammanfattning : .... LÄS MER
4. Vibration-based Assessment of Tensegrity Structures
Sammanfattning : Vibration structural health monitoring (VHM) uses the vibration properties to evaluate many civil structures during the design steps, building steps and service life.The whole function, expressed by stiffness and frequencies of tensegrity structures are primarily related to the level of pre-stress. LÄS MER
5. Countermeasures against railway ground and track vibrations
Sammanfattning : 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. LÄS MER