Search for dissertations about: "structural acoustic interaction"

Showing result 1 - 5 of 10 swedish dissertations containing the words structural acoustic interaction.

2. 1. Efficient Finite Element Approach for Structural-Acoustic Applications including 3D modelling of Sound Absorbing Porous Materials

   Author : Romain Rumpler; Peter Göransson; Jean-François Deü; Henry Rice; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Noise reduction; Poroelastic materials; Reduced model; Component mode synthesis; Padé approximants; Structural-acoustics; Finite element method; Fluid-structure interaction.; Matériaux poroélastiques; Modèles réduits; Sous-structuration dynamique; Approximants de Padé; Vibroacoustique interne; Eléments finis; Interaction fluid-structure.; Järnvägsgruppen - Ljud och vibrationer; Järnvägsgruppen - Ljud och vibrationer;

   Abstract : In the context of interior noise reduction, the present work aims at proposing Finite Element (FE) solution strategies for interior structural-acoustic applications including 3D modelling of homogeneous and isotropic poroelastic materials, under timeharmonic excitations, and in the low frequency range. A model based on the Biot-Allard theory is used for the poroelastic materials, which is known to be very costly in terms of computational resources. READ MORE

4. 2. Acoustic excitation and transmission of lightweight structures

   Author : Jonas Brunskog; Teknisk akustik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; point mobility; Lamb waves; wood.; Building construction; plate excitation; cavities; near-periodicity; nearly periodic; sound insulation; timber; structural acoustics; spatial Fourier transform; resilient device; prediction model; periodic; lightweight; ISO tapping machine; airborne noise; Building acoustics; impact noise; Byggnadsteknik;

   Abstract : In order to increase our knowledge of the sound transmission and radiation processes of lightweight wall and floor structures, theoretical models are needed. Detailed models may form a valuable tool. In lightweight floor structures, impact sound insulation is perhaps the most important property to consider. READ MORE

5. 3. Design of Multifunctional Body Panels in Automotive Applications : Reducing the Ecological and Economical footprint of the vehicle industry

   Author : Christopher John Cameron; Dan Zenkert; Peter Göransson; Per Wennhage; Per-Olof Sturesson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sandwich panels; mutifunctional; structural acoustic interaction; NVH; vehicle acoustics; Vehicle engineering; Farkostteknik;

   Abstract : Over the past century, the automobile has become an integral part of modern industrializedsociety. Consumer demands, regulatory legislation, and the corporate need togenerate a profit, have been the most influential factors in driving forward the evolutionof the automobile. READ MORE

6. 4. Finite Element Analysis of Structure-acoustic Systems : Methods and Applications

   Author : Peter Davidsson; Byggnadsmekanik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Paper 1The problem in which a flexible structure interacts with an acoustic fluid is analysed by use of the finite element method. With increasing complexity of the geometry and when increasing the frequency limit is of interest, the number of degrees of freedom needed to describe the system becomes very large. READ MORE

7. 5. Development and Assessment of Methods for the Prediction of Hydrodynamic and Ultrasound induced Cavitation

   Author : Ali Kadhim Hadi Alhelfi; Värmeöverföring; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Keywords: Bubble dynamics; Cavitation; Ultrasound; Acoustic waves; Sonoluminescence; Sonochemistry; and Boundary integral method.;

   Abstract : The cavitation phenomenon has today become a keystone for different areas of science and technology including various industrial processes and medicine. Recently increasing interest and much attention have been paid to study this phenomenon. READ MORE