Method of Virtual Work for Beams Example 1 (Part 1/2) - Structural Analysis
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- Опубликовано: 8 фев 2025
- This video is an introductory and very detailed example demonstrating the application of the principle of virtual work on a cantilever beam. If you have never used the method of virtual work or need a refresher this is a good place to start.
Part 1: Overview of the approach and calculating the slope at point B.
Part 2: Calculating the deflection at point B.
I got 73% in Structures last year (2022) all because of you. Thanks buddy.
Thank God for structurefree
If you need a step-by-step on how to apply the method of virtual work for beam deflections, this video is a good place to start.
+structurefree so this is castigliano's method?
+Segurasegura Jorge no it isn't, castigliano has a lot of similar stuff going on, one might even say it builds on the Virtual Work method, but it is different. Just google it
Just want to give a huge thanks for making these videos! You make many concepts so easy to understand. I really appreciate these videos!
"It might seems like a normal tutorial video, but it saves millions of college students' lifes." Jesus said.
can i get a witness?
@@structurefree he'll say it to you himself when you go up there man.
Thank you for the video ! I was totally lost in class but now i understand thanks to you :)
The way you say ''Positive' is driving me crazy !! keep it up good work !1
"paaaasative"
Seriously love your videos. I'm not gonna lie, you've helped me a good deal on a couple of homeworks and tests
where are you from?
@@hunnykumar2401 Brazil
can we discuss structure analysis
Structurefree!!!!!!!!! Saved me for 2 years now!!!
I gruadated previously year, thank you for everything.
I spent 3.5 years (2020-2024) in civil engineering before finding this literal goldmine
This guys intros crack me up 😹
You are a godsend. God bless you, child.
+Yonas Ogbai Can I get an AMEN!?!
+structurefree AMEEN
Hello Mr StructureFree, any chance you can do a video on Stiffness Matrix and Plastic Analysis? I understand this may not be your field but we have exams in January and we NEED you :'(
Amen.
why cant my lecturer be as clear and sensible as you??! good work
You are the best dude! I really like a joke at the beginning 😹😂😂
You the best, dude
thank you very much! Very useful video!!
i dont know english well but i understand it and i can make my exam tomorrow :)
Do you have any videos that explain how to get the moment functions?
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Why is it that when you try and make the moment equation starting with the left side it doesn't give you the same equation as starting from the right side if you section the beam? I thought statics should work out whichever way or I'm I doing it wrong?
Hello may i know where the 5kn came from? Btw its a good explanation.
Energy method structural analysis bascis
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why are we using real curvature M/EI??
Why do you use 1KN/1KNm instead of simply 1N/1Nm that would simplify everything?
Can you tell me how do you find moment functions?
Thanks for usefull videos
12:07 is it right I describe the M function as M = -10 ( 3- x) then 13:49 the rotation will -1/EI * integral { -1 * -10 (3-x)} from 0 to 3 = 45 ?
why is the moment negative 30?
Using the princple of virtual displacement with aprrox. with approximate virtual func. below determine the tip displacemen of the beam(&u=(x^2/L^2) &u= (X^3 / L^3) &u=(x^4 /L^4 ) AND &u= lnx /L^4 )
hello, how do you determine the moment of real loading is -30kNm. what i mean here is how do you know the moment is negative? sorry if i sound like a noob here :(
Fahmy Hamzany the negative moment depends on the internal sign convention used for the beam. in this example, i am looking at the beam from going left to right and positive internal moments cause compression at the top and tension at the bottom. Hope that helps.
okay now i get it. Thank you very much sir :)
You...I like you
Isn't the virtual moment function 1KN.x - 3KNm? Did you apply a virtual unit moment when you were to apply a virtual unit load ( 8 min into the video)?
Could you do an example of this method using the Mohr's integral matrix?
Why do you apply a moment at the end of the beam instead of a downwards 1 particular load? Would that be the same?
Nvm I've already seen the video again haha
What happens if the Force is somewhere in the middle of the beam? (i.e. not loaded at the end)
Energy method structural analysis bascis
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thank you man
good
Thank u sooooo much
awesome
You are doing a great job! But please buy a better mic......
thnx a lot
I'm glad it's useful.
isnt there an integration constant?
no.. this is a definite integral
Virtual work and unit load method are same. Aren't they?????
How do you find the “virtual moment”. This concept makes zero sense to me and I have no idea how you got the numbers that you got.
You arbitrarily assume a unit moment is applied at the location. How large the moment is, will ultimately cancel out of the equation, so to keep it simple, you assume it is 1 N-m.
shouldnt it be 3x-30=y ?
I get it now...
thank u for this, its explained way better than in our online lectures. I just might fuck them off and follow ur playlist
why does the moment start at -30 and not at 30?!?
Same question.
Didn't realize Mvlovin taught engineering videos
Energy method structural analysis bascis
ruclips.net/video/OpNbnmZ2PTw/видео.html
you misspellled bema
Thanks! Awesome video!!! \(^_^)/ Do you have any videos on doing PVW by using equations instead of the graphical method with discontinuity in loads? I've tried doing that but I can't seem to fully understand how to apply the method of sections. Thanks in advance!
Why not +30? On Ma?
Energy method structural analysis bascis
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u sound like huskystarcraft haha thanks for the videoss
paaasitive
wassssuupppp
I wanna copy an example for my report whatever i dont know anything abt it 😹😹
Energy method structural analysis bascis
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God... is that you?
It's me Margaret.
oh your voice lol
I love you. Marry me.
Energy method structural analysis bascis
ruclips.net/video/OpNbnmZ2PTw/видео.html