Sökning: "vibration and acoustic engineering"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden vibration and acoustic engineering.

1. 1. Structure–Acoustic Interaction Between Vehicle Floor Panels and Carpets – Numerical Simulations and Measurements

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

   Författare :Aya Karim; Jesper Brindhag; [2021]
   Nyckelord :Structure-acoustic; Acoustic; Dynamic; Floor panels; Interior carpets; NVH; FEM; Finite element; PEM; Porous elastic; Noise radiation; Interior-noise; Vehicles; Vibration; Structure-borne noise; Technology and Engineering;

   Sammanfattning : An attribute that is highly valued amongst vehicle customers is low interior-noise levels when a vehicle is in use. Much of the interior-noise is believed to stem from the vibrations of floor panels in vehicles. LÄS MER

3. 2. Acoustic performance of timber volume elements

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk akustik

   Författare :Oliver Olsson; [2020]
   Nyckelord :Impact sound insulation; Air-borne sound insulation; Cross laminated timber; CLT; Timber Volume Element; Vibration Insulation.; Technology and Engineering;

   Sammanfattning : The thesis investigates the acoustic performance of light weight timber constructions known as timber volume elements and vibration insulation methods employed in these. Common materials used in light weight timber floor constructions and different floor configurations consisting of these materials were also studied. LÄS MER

4. 3. Conceptual Dynamic Analysis of a Vehicle Body

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

   Författare :Björn Pedersen; [2018]
   Nyckelord :Technology and Engineering;

   Sammanfattning : The noise, vibration and harshness (NVH) and body dynamic performance of automotive vehicles is highly dependent of the components included in the body structure and compartment, since they add mass, stiffness and damping to the overall structure. Today, the noise levels in the compartment are predicted using complex and detailed computational models during both early and late stages of the vehicle development process. LÄS MER

5. 4. Differentiation and classification of different materials on a touch-screen using a piezoelectric contact microphone

   Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

   Författare :Anders Björn; [2016]
   Nyckelord :Technology and Engineering;

   Sammanfattning : In this report, a potential improvement of an optical touch screen solution by means of acoustic sensing is presented. The goal is to utilize the different vibration patterns that arise when different materials touch the screen to be able to identify them. LÄS MER

7. 5. Wind-induced transmission of low frequency vibrations for a tall multi-storey wood building

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

   Författare :Gustav Spjuth; Louise Åkesson; [2016]
   Nyckelord :acoustic; CLT; FEM; multi-storey; radiation; SPL; vibrations; WIDC.; Technology and Engineering;

   Sammanfattning : The building industry accounts for a large part of the world’s carbon dioxide emissions. At the same time the awareness of sustainable construction and production phase has increased and focus has been directed towards the material wood. LÄS MER