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Old 12-15-2009, 12:28 PM   #1
ralfidude

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Default Need immidiate help, Engineering exam.

I have two problems to hand in before my actual exam that are part of the exam, and he asked a question i have no clue how to answer since we never went over how to do it. Any help?

http://i17.photobucket.com/albums/b6...idude/beam.jpg


This one is harder, but also having some issues with it.
http://i17.photobucket.com/albums/b6...ude/beam-1.jpg


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Old 12-15-2009, 12:52 PM   #2
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Default Re: Need immidiate help, Engineering exam.

you never did BMD's and SFD's??

christ...

can't really help as i'm doing eurocodes and British standards (old school) here which does things differently.


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Old 12-15-2009, 01:02 PM   #3
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Default Re: Need immidiate help, Engineering exam.

Nono, i mean i know how to draw the diagrams, and i know how to find all the reaction forces. BUT we were never taught how to go about it backwards, and NOT have the Loads given, therefore CANT find any reaction forces, and instead we have the maximum M and V and now im totally fu**ing lost.... Im checking online if theres a specific way of finding the load given the max V and M but out of 30 websites... i got nothing.

Every example is gone about doing it normally.


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Old 12-15-2009, 01:05 PM   #4
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Default Re: Need immidiate help, Engineering exam.

christ...

well from here it looks like you are dealing with 2 UDL's on the top one.

give me a min i'll leaf through my notes for you and see what i have.

E: sorry i don't have anything on me here for that...


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Old 12-15-2009, 01:12 PM   #5
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Default Re: Need immidiate help, Engineering exam.

Yeah, i figured... well thank you for your time sir.

Its a bitch of a problem.


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Old 12-15-2009, 01:19 PM   #6
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Default Re: Need immidiate help, Engineering exam.

Hold on.

Right here. http://www.awc.org/pdf/DA6-BeamFormulas.pdf On page 9, that figure 11. Would i be able to use that?


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Old 12-15-2009, 01:27 PM   #7
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Default Re: Need immidiate help, Engineering exam.

possibly.

the formulas look different to ours (though thats probably in the letters used for the equations)


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Old 12-15-2009, 01:35 PM   #8
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Default Re: Need immidiate help, Engineering exam.

Ah, iv gone through it and im stuck at just getting one reaction, still wont be able to get the other to calculate the reaction. Looks like im in trouble. Well thanks for the help.


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Old 12-15-2009, 03:34 PM   #9
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Default Re: Need immidiate help, Engineering exam.

For the second problem, for the equations iv gotten, the only thing thats missing is the Tension. If i can get that, i can find the reaction at a, and subsequently the reaction at b. Any ideas?

I already know the reaction at a for the x dimension is 0. Duh.


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Old 12-15-2009, 03:48 PM   #10
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Default Re: Need immidiate help, Engineering exam.

OH BOOBIES! Found it with a help from a friend!
http://met.spsu.edu/dhorton/2214/Ans...,8.41,8.44.pdf


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