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The International Space Station: Engineer Reveals The Truth About The ISS -

The International Space Station: Engineer Reveals The Truth About The ISS por Godrules   5 anos atrás

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The International Space Station: Engineer Reveals The Truth About The ISS
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My background is Mechanical Design Engineering, so I believe I am indeed qualified to speak on this topic.

There is no way competent engineers designed this:
http://upload.wikimedia.org/wikipedia/commons/0/04/International_Space_Station_after_undocking_of_STS-132.jpg

The design defies rudimentary engineering principles. You would want to minimize stress in the member components and avoid issues with angular momentum and tightly hold the center of gravity. But we find the exact opposite in the design of the International Space Station.

Notice how when pressure applied to the center of a beam, you have the weakest point:
http://blog.cencophysics.com/wp-content/uploads/deflection-fig2.jpg

Note just how long the center of the International Space Station is again:
http://upload.wikimedia.org/wikipedia/commons/0/04/International_Space_Station_after_undocking_of_STS-132.jpg

Lets say, for some reason, you wanted to design the International Space Station to be spread out like this.. The thing is, to make it even work, you would need to design load bearing members to counteract the stress on the main fuselage of the International Space Station.

For example look at this bridge design:
http://www.teachengineering.org/view_lesson.php?url=collection/cub_/lessons/cub_mechanics/cub_mechanics_lesson07.xml

Notice the different colors. The red shows greater stress. The idea would be to transfer stress from the road part of the bridge to the upper members and ultimately the arch.

Yet, we do not find anything of the sort on the space station. Considering that you would have rocket thrusters modifying its position on regular situations for direction correction, you would need such load bearing members to offset the stress.

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