Forced Vibration Tests
Baitings Dam (Where
Vibration tests were carried out on Baitings Dam,
gravity dam, in Yorkshire.
Special machines called "Rotating
Eccentric Mass Exciters" were used to put a small
force into the dam. Four of them were bolted to its top. (Show Me).
The vibrations of the dam were measured using accelerometers.
As the dam vibrated, it moved into and away from the reservoir,
changing the water pressure. The water pressure varied from
the face of the dam out into the reservoir.
Measurements of the changing water pressures were made using
These were suspended from buoys on the reservoir surface (Show Me).
Cables, carrying the electrical signals back to the dam,
were floated on the top of the water (Show
The measured accelerations and water pressures were compared
with those from a computer
simulation of the dam
(Why?). The forces from the "Rotating Eccentric Mass
Exciters" were also represented in the computer simulation.