Sökning: "Jan-Erik Ögren"

Hittade 1 avhandling innehållade orden Jan-Erik Ögren.

1. 1. Noise radiation from drill steels : and other experimental investigations in acoustics and fluid mechanics

   Författare :Jan-Erik Ögren; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : Drill rod noise has become a major noise source in percussive drilling. Generation of flexural waves, which seem to be responsible for most of the noise, is studied in a model with dynamic photoelasticity and in the real drill rod with strain gauge technique. LÄS MER