/sci/ - Science & Math » Thread #11116437

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Anonymous Mon 04 Nov 11:00:37 2019 No.11116437 View Reply Original Report

Quoted By: >>11116442 >>11116783

Statistics thread, also post some problems to solve.

Here is first. Solve moment A and B. I have answers for these, but not going to give them yet. I may give same hints if needed.

Anonymous

Anonymous Mon 04 Nov 2019 11:03:21 No.11116442 Report

Quoted By: >>11116443

>>11116437
Thinly veiled something something

Anonymous

Anonymous Mon 04 Nov 2019 11:04:31 No.11116443 Report

Quoted By:

>>11116442
Something something is great answer

Anonymous

Anonymous Mon 04 Nov 2019 11:18:50 No.11116473 Report

Quoted By: >>11116475

this is funny looking statistics

Anonymous

Anonymous Mon 04 Nov 2019 11:20:37 No.11116475 Report

Quoted By:

>>11116473
Yeah, meant statics, but can't edit.

Anonymous

Anonymous Mon 04 Nov 2019 15:20:35 No.11116783 Report

Quoted By: >>11116856 >>11116903

>>11116437
literally just $\sum M=0,\ \ \sum F_i=0$ this is not a good thread

Anonymous

Anonymous Mon 04 Nov 2019 16:15:47 No.11116856 Report

Quoted By: >>11116871

>>11116783
no, because the structure is overconstrained

Anonymous

Anonymous Mon 04 Nov 2019 16:27:10 No.11116871 Report

Quoted By: >>11116880 >>11116883

>>11116856
So use ?=E?

Anonymous

Anonymous Mon 04 Nov 2019 16:34:19 No.11116880 Report

Quoted By: >>11116883

>>11116871
force method or displacement method
i would use the displacement method because it has 5 overconstraints

Anonymous

Anonymous Mon 04 Nov 2019 16:35:46 No.11116883 Report

Quoted By:

>>11116871
>>11116880
yes, the displacement method comes out as [K]* = [F]

Anonymous

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Anonymous Mon 04 Nov 2019 16:48:50 No.11116903 Report

Quoted By: >>11116938

>>11116783
How you get ?M=0, ?Fi=0 ?
I have trying to study statics my own, but just can't understand this one.

I would appreciate some calculations how you solve this. Help me learn.

Anonymous

Anonymous Mon 04 Nov 2019 17:08:21 No.11116938 Report

Quoted By: >>11116970

>>11116903
a direct consequence of newtons first law. The members arent accelerating.

Anonymous

Anonymous Mon 04 Nov 2019 17:21:49 No.11116970 Report

Quoted By: >>11116974 >>11116978

>>11116938
I need example. I have been trying to solve this multiple hours now.

Throw the calculations, so I can learn from them.

Anonymous

Anonymous Mon 04 Nov 2019 17:23:36 No.11116974 Report

Quoted By: >>11116985

>>11116970
>throw the calculations
not going to make it

Anonymous

Anonymous Mon 04 Nov 2019 17:25:50 No.11116978 Report

Quoted By: >>11116985

>>11116970
>solve it for me
No. What don't you understand exactly? This is very simple, albeit tedious.

Anonymous

Anonymous Mon 04 Nov 2019 17:28:15 No.11116985 Report

Quoted By: >>11116996

>>11116978
>>11116974
I don't know, that's the problem. I would have used your calculations to check mine.
I'm getting over 300,000 Nm for moment A

Anonymous

Anonymous Mon 04 Nov 2019 17:33:19 No.11116996 Report

Quoted By: >>11117004

>>11116985
>300 kN-m
Okay. Whats the problem?

Anonymous

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Anonymous Mon 04 Nov 2019 17:37:55 No.11117004 Report

Quoted By: >>11117011 >>11117234

>>11116996
Problem is that it can't be right as I'm getting almost same value for moment B, so ?M wouldn't be 0.

If this is easy problem I hope someone creates example that I can use.

Anonymous

Anonymous Mon 04 Nov 2019 17:40:14 No.11117011 Report

Quoted By: >>11117024

>>11117004
But you get the values for the moments based on summing the moments to zero, so I dont see how thats possible. You are making basic algebra mistakes.

Anonymous

Anonymous Mon 04 Nov 2019 17:42:48 No.11117024 Report

Quoted By: >>11117043

>>11117011
I don't understand thats why I asked example

Anonymous

Anonymous Mon 04 Nov 2019 17:47:36 No.11117043 Report

Quoted By:

>>11117024
You dont understand why you make algebra mistakes?

Anonymous

Anonymous Mon 04 Nov 2019 18:52:53 No.11117234 Report

Quoted By:

>>11117004
Don't worry my friend. No one else didn't know how to do it either.

Anonymous

Anonymous Mon 04 Nov 2019 19:28:45 No.11117329 Report

Quoted By: >>11117334

does anyone visualize the forces and stresses without solving it numerically? I mean, taking a look at it seeing how it will bend and identifying the point where it will collapse

Once I solved them I like to look at the problem intuitively, creating a 3d simulation in mind. But I hate the solving procedure part of statics.

Anonymous

Anonymous Mon 04 Nov 2019 19:29:37 No.11117334 Report

Quoted By:

>>11117329
Yes, everybody does this

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