Sökning: "Vibro-acoustics"

Hittade 4 uppsatser innehållade ordet Vibro-acoustics.

  1. 1. Estimation of blocked forces from a rear drive unit (RDU) in a test rig fixture

    Master-uppsats, KTH/Teknisk akustik

    Författare :Sanjay Jayachandran; [2022]
    Nyckelord :Acoustics; Vibration; Sound; Mechanics; Blocked Forces; Transfer Path Analysis; Component-based TPA; Vibro-acoustics;

    Sammanfattning : In the modern world, vehicle manufacturers are not the sole producer of every component in a vehicle but instead assign different subsystems to various OEMs (Original Equipment Manufacturer). Subsystems such as Rear Drive Units (RDU), Power Transfer Units (PTU), E-drives etc. are developed separately and then integrated into the main vehicle. LÄS MER

  3. 2. Electromagnetical model of an induction motor in COMSOL Multiphysics

    Uppsats för yrkesexamina på avancerad nivå, KTH/Elektrisk energiomvandling

    Författare :Viktor Wilow; [2014]
    Nyckelord :Electromagnetical model; Induction motor; Finite element method; COMSOL Multiphysics;

    Sammanfattning : Ansys, Flux or COMSOL are examples of software-tools that can be used to study magnetic noise, caused by magnetic forces in the air-gap, in induction motors. The project team wanted to use COMSOL in this thesis. The electromagnetical domain needs to be coupled to the mechanical domain to complete the study. LÄS MER

  4. 3. Electromagnetic Noise from Permanent Magnet Motors

    Master-uppsats, KTH/Farkost och flyg

    Författare :Sajan Varghese; [2013]
    Nyckelord :;

    Sammanfattning : With today’s increase in rail traffic the impact of noise on the people near railway lines is increasing. To control this problem European Union regulations, including TSI (Technical Specifications for Interoperability) Noise, has come into force by implementing many strict norms on new railway vehicles put on the market. LÄS MER

  5. 4. Structure-Acoustic Analysis using BEM/FEM; Implementation in MATLAB

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Väg- och vattenbyggnad (CI)

    Författare :Fredrik Holmström; [2001]
    Nyckelord :Vibro-Acoustics; CALFEM; Coupled; BEM; FEM; Acoustics; Implementation; Technology and Engineering;

    Sammanfattning : This master dissertation describes the process of implementing a coupling between the boundary element method (BEM) and the finite element method (FEM) for three dimensional time harmonic structure-acoustic models in CALFEM, which is a finite element toolbox to MATLAB. Since no boundary elements earlier have been represented in CALFEM the development and implementation of constant and linear boundary elements is also described in this thesis. LÄS MER