Search for dissertations about: "damping"

Showing result 1 - 5 of 279 swedish dissertations containing the word damping.

  1. 1. On modally distributed damping in heavy vehicles

    University dissertation from Stockholm : KTH

    Author : Peter Holen; KTH.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; damping; modal damping; chassis suspension; heavy vehicle; attachment compliance; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : This thesis investigates passive damping system performance in heavy vehicles through analytical expressions, simulations with different vehicle models as well as through experimental evaluation in a tractor semi trailer combination. The objective is to study what levels of chassis suspension damping that are desirable for different vehicle modes and how this may be achieved with passive damping systems. READ MORE

  2. 2. Piezoelectric Generation and Damping of Extensional Waves in Bars

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Anders Jansson; Uppsala universitet.; [2007]
    Keywords : Technology; Piezoelectric; wave; generation; damping; bar; TEKNIKVETENSKAP;

    Abstract : This thesis focuses on the electromechanical processes of generation and damping of transient waves in bars with attached piezoelectric members. In particular, the influence of amplifier and electrical circuitry on the mechanical waves is of interest. READ MORE

  3. 3. Improving Machining System Performance through designed-in Damping Modelling, Analysis and Design Solutions

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Lorenzo Daghini; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining performance; Cutting stability; Passive damping; High Damping Interface; Boring bar; Turret; SRA - Production; SRA - Produktion;

    Abstract : With advances in material technology, allowing, for instance, engines to withstand higher combustion pressure and consequently improving performance, comes challenges to productivity. These materials are, in fact, more difficult to machine with regards to tool wear and especially machine tool stability. READ MORE

  4. 4. The effects of damping treatment on the sound transmission loss of honeycomb panels

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Sathish Kumar Ramanathan; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sandwich Structures; Honeycomb Panels; Sound Transmission; Loss Factor; Damping; Sound Radiation; TECHNOLOGY Engineering physics Acoustics; TEKNIKVETENSKAP Teknisk fysik Akustik;

    Abstract : In the industry, all passenger vehicles are treated with damping materials to reduce structure-borne sound. Though these damping materials are effective to attenuate structure-borne sound, they have little or no effect on the air-borne sound transmission. READ MORE

  5. 5. A study of active-passive damping treatments

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hélène Illaire; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active vibration control; damping mechanisms; active constrained layers;

    Abstract : Active Constrained Layer (ACL) treatment is a vibration-damping treatment which consists of a viscoelastic layer constrained by an actuator. It dissipates energy simultaneously by the shearing of the viscoelastic layer and by the action of the actuator. READ MORE