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Science Forum Index » Mechanics Forum » Urgent help on Mechanics of materials Question.....
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| Author |
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| Monster... |
 Posted: Fri May 09, 2008 6:03 am |
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Guest
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hi everybody..
i have a question that must be solved using any computer program..
the question is :
Disks D1, D2, ..., Dn are attached to a fixed ends solid shaft AB of
length L, uniform diameter d, and yield stress, Sy. P1, P2, ..., Pn
are forces applied to the disks, either at the top or bottom of a
vertical diameter, or at the left or right end of a horizontal
diameter. They are known except one. Denoting by ri the radius of disk
Di and by ci its distance from the support at A, Develop a computer
program to calculate the magnitude of the unknown force Pi.
Note: Only one force is applied in each disk and its direction might
be in +z,-z or +y,-y .
i know this question is solved using Moment equation by calculation of
all moments of the known forces ( moment = force* diameter ) and then
equating the resultant moment to the moment of the unknown force to
find the force.. but its algorithm seems hard to me as the direction
of the forces may give me negative moments or positive moments,thus
the resultant moment of the known forces depend on their
directions..Can any one help me on that, how to start and what to do ?
Thank you very much, i appreciate you HELP.. |
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