[APD] Re: Aquarium as Seismometer

["Tom Wood" <tomwood2 at flash_net>]

We built a new convention center here that has a ballroom above the exhibit 
halls below with long span steel trusses supporting the load. Turns out the 
engineer didn't design in enough rigidity to the ballroom floor and it can 
be put into a rythmic motion under the right circumstances, such as the 
bounce created by a lot of dancers. The fix? Computer controlled equipment 
with big weights mounted to the steel trusses that can be set into counter 
motion to dampen the dancer's bounce. Accelerometers are involved, and they 
didn't look all that complicated. So maybe a big lead weight sliding on a 
rod connected to a computer?

TW 


_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants