Sökning: "Substructuring"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet Substructuring.

  1. 1. Hybrid and Dynamic Substructuring Methods for Energy Flow Analysis

    Författare :Anders Wilson; Chalmers University of Technology; []
    Nyckelord :fractional derivatives; structural modeling; mid-frequency; finite element method FEM; vibro-acoustics; statistical energy analysis SEA; dynamic substructuring; hybrid analysis; viscoelasticity;

    Sammanfattning : Modeling techniques and solution tools to analyze the dynamic and vibro-acoustic behavior of complex built-up structures are matters of increasing interest, especially for thin walled structures as in transportation vehicles, such as automobiles, trucks, trains and aircraft. In structures like these, the reduction of cost, weight, sound and vibration levels are primary issues for research and development. LÄS MER

  2. 2. Identification and Synthesis of Components for Vibration Transfer Path Analysis

    Författare :Per Sjövall; Chalmers University of Technology; []
    Nyckelord :Sensor placement; Indirect sensing; Vibration control; System identification; Experimental methods; Substructuring; Kalman filter; Transfer path analysis; State-space models;

    Sammanfattning : Transmission of structure-borne vibrations in built-up structures, e.g. vehicles such as aircraft, automobiles and trains, is addressed. Methodologies for modeling, analysis, prediction and reduction of vibrations are developed. LÄS MER

  3. 3. Statistical Energy Analysis and the Individual Case

    Författare :Claes Fredö; Chalmers University of Technology; []
    Nyckelord :indirect couplings; random vibration; substructuring; transmission; statistical energy analysis; energy flow; theory; three subsystem;

    Sammanfattning : For many years, one of the most used methods for vibro-acoustic analysis of transmission of Structure-Borne Sound in complex built up structures has been the method of Statistical Energy Analysis (SEA). SEA has many advantages that makes it attractive for engineering use. LÄS MER

  4. 4. Structure-acoustic analysis; finite element modelling and reduction methods

    Författare :Peter Davidsson; Byggnadsmekanik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mechanical engineering; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; low frequency range; building acoustics; lightweight structures; porous materials; modal reduction; substructuring; finite element analysis; structural acoustics; vibroacoustics; Structural dynamics;

    Sammanfattning : This thesis investigates structure-acoustic systems by use of finite element analysis. The systems studied here are limited to those that consist of an enclosed acoustic fluid cavity, which is coupled to a flexible structure and/or a porous sound absorbing material domain. LÄS MER

  5. 5. Prediction of structural dynamic behaviour under uncertainties: With applications to automotive structures

    Författare :Mladen Gibanica; Chalmers University of Technology; []
    Nyckelord :sensor localisation; experimental design; noise and vibrations; structural dynamics; automotive industry; model updating; uncertainty quantification; substructuring;

    Sammanfattning : The automotive industry is moving towards shorter development cycles for new car generations. This means that less expensive prototypes can be built and tested, and that, increasingly, computer models must be used for decision making. LÄS MER