Last week in class we start work on the
basic calculation of the force that on each member. We learn how to use free
body diagram and trigonometry to get the force that is one each member, but it
need a lot of calculation. The bridge design is the next thing we learn that
could help calculation the force. It was very quick and useful. It is better
the calculation by hand. I believe we can do a better job on our second bridge.
Next week we would start to work on our
second bridge. By the experience we had on our first bridge and the ability of analyze
the tension and compression of each member we can design our second bridge in a
better way and made it more effective.
The ability of analyze is very helpful but
it also have a lot of limited. Analyze we learn just calculate the force form
one side but not all the side. The structure in the middle also can be affecting
the finial load. In the first test our bridge is fall down because of the twister.
The bridge design did not count the chance of bridge twister. The other part
that is also very important is the joins. K’net has a very weak join. It fall
apart very easily even the member can support the loads the joins could fall apart
and made the bridge fall down. It better to know the limit for the join and how
much force is do on it. That could help a lot.
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