Search for dissertations about: "Dynamic stiffness"

Showing result 1 - 5 of 128 swedish dissertations containing the words Dynamic stiffness.

  1. 1. Dynamic track stiffness measurement : a new tool for condition monitoring of track substructure

    University dissertation from Stockholm : KTH

    Author : Eric Berggren; KTH.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technology; track stiffness; track maintenance; soil dynamics; measurement; TECHNOLOGY Engineering mechanics Vehicle engineering; TEKNIKVETENSKAP Teknisk mekanik Farkostteknik;

    Abstract : .... READ MORE

  2. 2. Railway Track Stiffness Dynamic Measurements and Evaluation for Efficient Maintenance

    University dissertation from Stockholm : KTH

    Author : Eric Berggren; KTH.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway track stiffness; maintenance; soil dynamics; measurement; simulation; vibration; TECHNOLOGY Engineering mechanics Vehicle engineering; TEKNIKVETENSKAP Teknisk mekanik Farkostteknik;

    Abstract : Railway track stiffness (vertical track load divided by track deflection) is a basic parameter oftrack design which influences the bearing capacity, the dynamic behaviour of passing vehiclesand, in particular, track geometry quality and the life of track components. Track stiffness is abroad topic and in this thesis some aspects are treated comprehensively. READ MORE

  3. 3. Controlling the dynamic characteristics of machining systems through consciously designed joint interfaces

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Constantinos Frangoudis; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Production; machine tool; machining system control; joint interfaces; JIM; stiffness; damping; vibrations; machining process; milling; turning; deflections; accuracy; dynamic response;

    Abstract : The precision of machining systems is ever increasing in order to keep up with components’ accuracy requirements. At the same time product variants areincreasing and order quantities are decreasing, which introduces high demands on the capability of machining systems. READ MORE

  4. 4. Dynamic train/track interaction : hanging sleepers, track stiffness variations and track settlement

    University dissertation from Linköping : Linköpings universitet

    Author : Andreas Lundqvist; Linköpings universitet.; Linköpings universitet.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Trains have been operating on ballasted tracks for over 150 years. During this time demands from the railway organisations and from the industry to increase axle loads and train speeds on the existing railway lines have increased. The reasons for this are both economial and environmental. READ MORE

  5. 5. On dynamic properties of rubber isolators

    University dissertation from Institutionen för farkostteknik

    Author : Mattias Sjöberg; KTH.; [2002]
    Keywords : Rubber isolator; Dynamic stiffness; Nonlinear; Payne effect; Audible frequency; Fractional derivative; Mittag-Leffler function; Thermo-rheologically simple; Neo-Hooke;

    Abstract : This work aims at enhancing the understanding and to provideimproved models of the dynamic behavior of rubber vibrationisolators which are widely used in mechanical systems.Initially, a time domainmodel relating compressions tocomponent forces accounting for preload effects, frequency anddynamic amplitude dependence is presented. READ MORE