Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The mechanical vibrations of power transmission lines caused by wind have been much studied. This paper applies the results of these studies to the mechanical vibrations of homogeneous vertical and round structures having the same diameter from one end to the other in cases where the lower end of the vibrating structure is rigidly fastened to its base. This report will show that metallic structures having low loss factors - for example, steel-structured chimneys as such - vibrate nearly always at their highest possible amplitude. Concrete chimneys, whose internal damping is from 10 to 20 times the damping of steel chimneys, vibrate at insignificant amplitudes. Generally speaking, vertical chimneys vibrate either at maximum amplitudes or - with sufficient damping - at insignificant amplitudes. The best damping method of the mechanical vibrations of chimneys is a spiral known as Scruton, which effectively prevents the wind energy from giving vibration energy to a structure susceptible to vibration. The locatin of mechanical vibration dampers into a chimney generates e.g. difficult location problems. (ERA citation 13:015665)
The mechanical vibrations of power transmission lines caused by wind have been much studied. This paper applies the results of these studies to the mechanical vibrations of homogeneous vertical and round structures having the same diameter from one end to the other in cases where the lower end of the vibrating structure is rigidly fastened to its base. This report will show that metallic structures having low loss factors - for example, steel-structured chimneys as such - vibrate nearly always at their highest possible amplitude. Concrete chimneys, whose internal damping is from 10 to 20 times the damping of steel chimneys, vibrate at insignificant amplitudes. Generally speaking, vertical chimneys vibrate either at maximum amplitudes or - with sufficient damping - at insignificant amplitudes. The best damping method of the mechanical vibrations of chimneys is a spiral known as Scruton, which effectively prevents the wind energy from giving vibration energy to a structure susceptible to vibration. The locatin of mechanical vibration dampers into a chimney generates e.g. difficult location problems. (ERA citation 13:015665)
Mechanical Vibrations Caused by Wind - Chimneys and Ventilating Pipes
E. Lampio (Autor:in)
1987
31 pages
Report
Keine Angabe
Englisch
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