Simulating Earthquakes With Lego Technic
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- Опубликовано: 14 янв 2023
- In this video I am using Lego Technic to demonstrate how earthquakes can affect different skyscrapers depending on the height of the buildings. Enjoy :)
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@@hasanshaeb40 Ф
I love working lego mechanisms, it would be unrealistically cool if you built, for example, a hydroelectric power station
such a youtube idea
Omg
@@Nox312 i saw a compressed air lego engine on youtube, i was amazed by it, but in that video the engine was not producing electricity in that RC car, and i thought that this is something that is sorely lacking
@@MaximNosko electricity? Was it used as a generator for the rc car’s motor.?
why not a hydronuclear bomb
That ending where each one shook worse at different frequencies was super fascinating to me. I never even though about that and how it could effect different building heights.
*affect, NOT effect
@@The_Legend47 it's a youtube comment, not a dissertation. you understand what they meant, friend!
@@oopsallbugs true.... Was trying 2 give a little constructive criticism
@@The_Legend47 I understand :)
@@oopsallbugs 😊👍🏻😉
Really nice demonstration of resonance frequencies at the end.
I like your style.
IKR ! So cool :D
Now if he could manage to design fake buildings that change the resonance frequency ... Much like real anti-seismic buildings in Japan for instance :o
yeah thats what got me)
Its interesting that the buildings resonate at different natural frequencies
I agree
@@nathanielsantana403 They are similar to upside down pendulums. In a Pendulum the frequency is directly depending on the length of the rope/rod (f= sqrt(g/l) where g is the gravitational constant and l is the length of the rope)
It’s sad that Technic doesn’t get more love from the Lego company, the Ideas collection would be so cool with Technic included even if just as it’s own little run
A new selection of old school classic technic models is something I've literally dreamt about. The 1980 chassis car, 1992 pneumatic truck and the 1996 space shuttle have yet to be beaten in design and ingenuity imo
@@Senyoln1 I would love if Lego had more pneumatic sets
@@filgiupo4853 Yeah right! I've got a thing for pneumatic sets. I remember the 8851 Excavator (1984) being really tricky to build. The switch functions were really tightly packed. Probably a design flaw, but good memories none the less. A new set like the 8455 Back-Hoe (2003) would be great: the king/queen of pneumatics. 10 of the things and so well engineered, especially how they were integrated to realise the rotation of the back hoe section.
@@Senyoln1 I have the huge pneumatic excavator but I don’t remember the year it’s from and it still works like a charm
That's why knex exists.
So cool that you were able to show the resonance frequency so clearly, i love it!!
Would be really cool to see these tested with a tuned mass dampener added, it would be a perfect way to simulate one.
In a way, each building being nearly the same weight, just different heights, is almost as if they ARE tuned mass dampers, each set up to most effectively dampen a certain frequency.
I agree, I was hoping that's what this video was gonna be when I clicked on it. Still a really cool video tho
@@Nevir202 You are right about the fact that each building resonates at a different frequency, but it's not really correct to say that any of these are dampened, rather it's just the nature of their structure that they resonate. A TMD's job is to give something for a lot of the energy of the building to go into, like a pendulum essentially. This will give the top of the building somewhere to dump all of that energy, essentially, by making the pendulum move instead and causing the wave to peter out much faster.
Basically, the structure of the building passively dampens it to certain frequencies of waves, but a Tuned Mass Dampener will resonate with the building and _actively_ quell the wave at a much wider band of frequencies, and cause the wave to dissipate much faster
Would be a little outside of Lego, but you could perhaps suspend a water bottle from the top of the tower, which would allow you to add or remove water as you go to fine-tune the weight.
@@tbotalpha8133 It would be easier to adjust the length of the spring (a vertical bar) that holds the mass of the tuned mass damper, changing the length of the spring would change the stiffness of the oscilator that is the TMD. The goal is that the oscillating frequency of the TMD is equal to the fundamental frequency of the building.
The frequency of an oscilator depends on the mass and the stiffness.
If you apply the idea of the water you would be changing the frequency of the TMD by changing its mass. But, at the same time you would be changing significantly the mass of the system "buiding+TMD", so at the same time the frequency of the system changes significantly (half a bottle of water weights more than the whole lego building).
In fact adding just a water container in the building would be useful to show how the natural frequency of the building changes when changing the mass of the oscilator.
youtube really said now is when they recommend this video
Turkey; hold my Lego…
Bruh you recommend this now
4:54 that was the most satisfying Lego crunching ever.
bro predicted the future , what a coincedence he did an earthquake video right before one of the biggest earthquakes took place in the middle east
Dammit man look what you've done to Turkey
😱
This channel is too underrated, definetly subscribed bro, the work you put into your vids is insane (for me atleast)
Thanks for the sub bro!
yeah i aggree with you
also subbed!
same
same tooo
who would have thought that after 2 weeks this video will be perceived completely differently after what happened in Turkey.....
Odd how this got recommended after the recent earthquake
Oh! This explains how slower earthquakes are really what topple skyscrapers. The faster shakes do almost nothing… that’s so amazing to see!!
That's an oversimplification.
Each building has natural frequency based on it's height, matching tbe natural frequency causes extreme movement. Lower building have higher natural frequency.
It seems that the gears he chose matched the natural frequencies almost perfectly. Being close to the natural frequency is pretty bad for stability but only when you match perfectly it will you see such extreme wobbles.
A slow earthquake isn't dangerous by itself, it needs to be the exact speed, to topple it not too fast nor too slow.
@@baggelissonic that’s fascinating
Yoo whats good edg
@@KRABPXL sup krab, shits good. yourself?
@@ENDESGA I’m doing good, didn’t expect to find you here but it is sorta in character for you haha!
It's really satisfying how each gear was tuned to vibrate each building at its resonant frequency.
The fact that you set this up so each gear was that tower's resonant frequency (or whatever specific thing it was) made me laugh out loud; great work!
“It’s a bit unstable and quite loose”
Well I wasn’t expecting to be called out like this in a Lego Technic video 😤
bizim ustalar daha şu legolar kadar sağlam yapamıyor la
Sorry about that
6:41 That is so cool that you got the gearbox to resonate with the buildings, almost like you planned it! Thanks for the video
6:47 the principle of resonant frequencies perfectly displayed
I'm teaching my students about earthquakes and this would be awesome to show. What sets would I need to build this? Too much to ask for some plans???
Unfortunately I can’t tell you what sets is needed to build this, given that my collection of bricks is from many different sets I’ve collected trough the last 10 years, and I haven’t made any instructions on this project either, but feel free to give it a try, if u have some bricks laying around!
Unironically a good example of the phenomenon called “Resonant Frequency” in action
love me some resonance, awesome
You should add pendulum weights to them! I'm pretty sure that's what they do in some skyscrapers to stop them collapsing... (Maybe also add hinges at the bases of the towers as some building do have them)
It would definitely be interesting to see the different solutions that the engineers around the world has come up with to avoid collapsing skyscrapers! Great idea!!
Yes, please do this, I would love that.
They are called mass tuned dampers btw .
@@helderboymh Thx, they didn't go into specifics when I learned about them... 🙃
@@brickbuilds101 Good videos btw, keep up the great work. 👍
Interesting way of showing resonance :) Maybe that's an opportunity to show the effect of a free hung mass at the top of the structures on the vibration frequence...
Tuned mass damper essentially
Such as the one used in the Taipei 101
wow, the final result of gear 2 and 3 was counter intuitive for me :D
Waiting for this channel to blow up in popularity. Great job
The approximate fundamental period for a building is Ta = Ct * (h) ^ x
h is height and -
for steel moment frames: Ct = 0.028, x = 0.8
for concrete moment frames: Ct = 0.016, x = 0.9
for Lego moment frames: Ct and x = ?
Try offsetting the top weight. Torsional racking can create some interesting shapes
If social media had more comments like this the world would be much better for it.
4:55 This was way more satisfying than it should have
This video is a great demonstration of the phenomenon of resonance frequency
I loved how each of the gears matched the resolnate frequency of the different buildings 😅
Very cool. Would’ve been cool to see how diagonal bracing would help dampen the motion too.
This is an incredibly good demonstration of what resonant frequencies are, thank you for making this
This dude really just made the entire country of turkey out of only legos. Fascinating, maybe you could do italy next
I love this type of content I just saw your video on my recommendations page and I definitely subscribed because your channel is so underrated and you are so much like brick experiment channel
This video is a bit foreshadowing.
Very nice example of various frequencies with different resonances affected different building types.
i love the building groove machine. really makes the buildings dance
I love your videos! They're always so helpful and informative.
And by the way, your video formats for building, constructing and speed ups are PERFECT! I’m NEVER bored watching! 🏆👍🏽
4:55 my back when I get home from work
4:55
this the sound I want my spine to make when I stretch good
cool video and all, but holy crap the sound of the technic pins snapping into place was absolutely sublime
Had to laugh at the 3rd Gear, nice work what you did! It´s relaxing to watch your Videos.
I think it’s safe to say: now we know what caused the Turkeys quakes
Very good video! At this point I would love to see you test out some of the concepts to prevent big movement by earthquakes like a pendulum or something like that
I like how you can see the different resonance frequencies.
This stuff is great, keep it up man
Results in the end were amazing
A great practical showcase of different resonances.
man i love how each time the gear gets higher, the lower building has it worst
Very interesting, learned a lot about how speed/frequency affects the buildings regardless of size :D
Great video!
This system that you created would be really useful to show some principles of structure dynamics and earthquake engineering. Here you just show how you can make the building resonate by applying a frequency that matches the fundamental frequency of the building. Next thing you could do is:
Option A) Add a Tuned Mass Damper to the tallest building. You acompplish this by adding a pendulum or some kind of oscilator at the top. The frequency of that TMD has to be similar to the frequency of the natural frequency of the building. If you tune it correctly the TMD will oscilate with the same frequency so that the TMD would oscilate instead of the building.
Option B) Add a base isolation to the shortest building. You would have to add a flexible floor between the the base of the building and the floor; a floor that has less horizontal stiffness. By adding this base isolation you would be changing the natural frequency of the system building+base isolation, so with the earthquake "gear 3" the building would oscilate less and all the horizontal deformation would happen at the base isolation. You can make a demonstration of two identical buildings in size, one with base isolation and the other without base isolation.
Or you could just simply show how changing some characteristics of the building (mass and horizontal stifness) changes the its natural frequency.
amazing video! i would love if you could make one where you would explain (with lego) the principles behind a gear shift
I love the way you edit your videos!
Instant subscribe!! Nice job!
If u measure the acceleration at the top of a building of fix length for different frequencies of excitation, u will get a very nice resonance curve and can find the resonance frequency of ur towers. I remember doing this topic as my final high school extended essay. Back then I also used Lego (although I made the actual tower out of wooden sticks) to made the apparatus. It was quite fun! Good video :)
For my research topic, I was looking into Tuned mass dampers (TMD) which are pendulum on topic of skyscrapers that limit the effect of earthquakes and reducing amplitude of the tower at the most dangerous frequency (ie the resonance frequency).
This is an awesome model to show simple harmonic motion
This is sick bro, deserves a sub!
So many satisfying elements in this video. The great ASMR and the dancing skyscrapers. Would love to see this taken to the next level. Subscribed! :)
The sounds are so satisfying...
Can we just take a moment to appreciate how much work Brick puts into his videos?
Super cool! It works super realistic too!
As a kid, I use to love Erector sets. But after seeing what engineering feats you pull off, I Love Lego! Absolutely Genius You Are! 😮❤
Perfekt. Das ist gut.
It really shows how every structure has a natural frequency.
Skyscraper: It's a slight earthquake. AAAAAAHHHH oh the earthquake's worse now we're fine.
Now that’s some crazy science.
The faster the earthquake quakes, it effects the smallest buildings but not the biggest and vice versa.
amazing resonance frequency demonstration love it
I would've gone with "Oops" personally
But big Ups to you for being brave enough to go against the grain
Really nice demonstration of resonance !
This really well demonstrates how height in skyscrapers affects how they handle earthquakes.
Very cool stuff!
those buildings be grooving
This video is a *fantastic* collection of noises!
Nice! I didn’t expect the final result tbh.
he knew
You have great videos, I enjoy watching them
amazing effort!!
I am impressed that you always have all the parts you need O.o
That’s quite cool the faster the ground shakes the more vulnerable smaller structures get. It makes sense in hindsight since the with big one the top doesn’t have time to move.
New subscriber here! This is some really great content, could be easily used for education as well. Great stuff!
Nice artwork!
Brilliant demonstration!
the end of this video should be in science classrooms everywhere for a visual example of resonant frequencies
Interesting how the taller structures almost stable out in position the faster it rumbles.
7:02 What I've learned: bigger the building = slower the movement (to get it to wobble)
Mission complete! It’s basically a stiff pendulum upside down. In a pendulum the only thing effecting the oscillation time is the length of the pendulum, therefore if the building is taller the ground has to move slower for the buildings resonant frequency to match the ground movement.
In essence, that's why skycrappers are incredibly difficult to design while being seismic proof ! :)
6:56 Steam locomotive maybe
7:07 HELIKOPTER HELIKOPTER
Best Lego stuff I hav ever seen
Oh wow, this is quite interesting… the way the different speeds affect the different heights. I learned something new
Y do i find the putting lego together sound satisfying
I like how he goes back an modifies the build after running into a problem, instead of editing it out.
remember kids, failure is always an option
i never heard such asmr lego building
for those who don't know, a resonance frequency is the natural frequency of something. like if you flick a glass the frequency of the ting sound is the glass' resonance frequency and you can break the glass sometimes by re-creating that frequency
I like playing with Legos but I like watching your videos because it gives a sort of ASMR to me.
I'm so using this in class to illustrate resonance!
Great video!
Sounds like a LEGO tap dance. 🤣(Great vid. I enjoyed it)
"ups, a bit too fast", "perfekt!", Very Nice.