Ball drop -design
Ball drop -design
(OP)
Someone asked me to design a 6 feet diameter ball to be dropped for new year eve. It will be steel skeleton. What force should I keep in mind to resist?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Ball drop -design
RE: Ball drop -design
Mike McCann
MMC Engineering
RE: Ball drop -design
Weight will be depend on size of steel section used to resist design loads.
RE: Ball drop -design
F=ma
Energy has to be dissapated somehow.
RE: Ball drop -design
If that's the case, the dynamic loads should be negligible. If they're actually dropping the ball, the forces will be large, plus the ball might start rolling somewhere.
RE: Ball drop -design
Does the ball have to survive the drop?
Can you control what the ball lands on?
RE: Ball drop -design
Determine the coefficient of restitution between the ball and the object it is striking. This will be a function of the elastic properties of the two bodies. Determine the length of time the two objects are in contact before the ball bounces up. If the ball doesn't bounce up, determine how far its centroid moves after first making contact with the ground.
The following may help:
http://www.jw-stumpel.nl/bounce.html
BA
RE: Ball drop -design
RE: Ball drop -design