Left) Test of a empty large frequency band liquid damper.
Right) Test of a properly filled large frequency band liquid damper.

35 m vibrating process column

75 m vibrating process column

55 m Vibrating flare

Low frequency vibration of a radom on top of a telecom mast

2nd mode vibration of a 45 m mast

Vibration of a steel stack fitted with helical strakes (Sc< 8)
 
Vibration of s steel stack fitted with helical strakes (Sc<8) in group arrangment

40 M VIBRATING STACK (1)

40 M VIBRATING STACK (2)