Sökning: "mufflers"
Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet mufflers.
1. Modelling and Characterization of Perforates in Lined Ducts and Mufflers
Sammanfattning : Increased national and international travel over the lastdecades has caused an increase in the global number ofpassengers using different means of transportation. Greateffort is being directed to improving the noisy environment inthe residential community. LÄS MER
2. Innovative noise control in ducts
Sammanfattning : The objective of this doctoral thesis is to study three different innovative noise control techniques in ducts namely: acoustic metamaterials, porous absorbers and microperforates. There has been a lot of research done on all these three topics in the context of duct acoustics. LÄS MER
3. Investigation of perforated mufflers and plates
Sammanfattning : Mufflers are used in for instance exhaust system of cars or trucks to reduce noise. Perforated pipes are one of the main components of modern mufflers. To study acoustic properties of mufflers with perforated pipe is one of the main targets of this thesis. LÄS MER
4. Investigation and Optimization of the Acoustic Performance of Exhaust Systems
Sammanfattning : There is a strong competition among automotive manufacturers to reduce the radiated noise levels. One important source is the engine exhaust where the main noise control strategy is by using efficient mufflers. LÄS MER
5. Analysis, Control, and Design Optimization of Engineering Mechanics Systems
Sammanfattning : This thesis considers applications of gradient-based optimization algorithms to the design and control of some mechanics systems. The material distribution approach to topology optimization is applied to design two different acoustic devices, a reactive muffler and an acoustic horn, and optimization is used to control a ball pitching robot. LÄS MER