Sökning: "Sven Johansson"
Visar resultat 1 - 5 av 51 avhandlingar innehållade orden Sven Johansson.
1. Active Control of Propeller-Induced Noise in Aircraft : Algorithms & Methods
Sammanfattning : In the last decade acoustic noise has become more and more regarded as a problem. In cars, boats, trains and aircraft, low-frequency noise reduces comfort. Lightweight materials and more powerful engines are used in high-speed vehicles, resulting in a general increase in interior noise levels. LÄS MER
2. Active Noise Control in Aircraft : Algorithms and Applications
Sammanfattning : The thesis consists of five papers which are divided into three main parts. Parts A and B deal with active noise control in a propeller aircraft application, whereas Part C deals with active noise control in a helicopter application. LÄS MER
3. A computational study of interface structures and energetics in cemented carbides and steels
Sammanfattning : Cemented carbides are hard composite materials of great industrial importance. Because of their combination of hardness and toughness, they are used e.~g. for cutting, drilling, turning and milling. LÄS MER
4. Perceptual and physiological indicators of physical strain in relation to working capacity and illness
Sammanfattning : .... LÄS MER
5. Multiscale Modeling of Interfaces
Sammanfattning : Understanding strength and stability of interfaces between dissimilar materials or phases is a highly active field of contemporary materials research. Knowledge of interface structure and energetics is important for modeling of complex materials both on a mechanical and thermodynamical level as well as for many functional properties. LÄS MER