Tests of three SDOF systems on educational shaking table.
Пікірлер: 89
@dropatrain9 жыл бұрын
Very good demonstration of resonance! As well as a good demonstration of the deflected shape of a fixed-fixed column!
@lvanvan2 жыл бұрын
dont estimate that tall metal column will be fix ... it will definitely plastificate near fixed base and will behave more like pinned one.... so brace your tall steel!
@MaghoxFr12 жыл бұрын
I typed random letters on the browser and ended up here. Such an awesome video!
@nizamieminov36487 жыл бұрын
perfect demonstration , thank you !
@guitarczar1512 жыл бұрын
@Asusisuful Each structure has it's own natural frequency. Like for example, a tuning fork has a natural frequency when you hit it. No matter how hard or where you hit the tuning fork it will vibrate at that natural frequency. When the table vibrates at the natural frequency of the structure it begins to resonate. This means the waves add and the vibration of the structure becomes bigger as shown in the video.
@CritCorner12 жыл бұрын
@NairoukhMouhannad Resonance frequency is a function of the mass of the system, and the stiffness of the system. The formula ω² = k/m is the basic formula to determine natural frequency (or resonance). k is also a function of length: k = (AE)/L, where A is the cross section area of the spring member, E is youngs modulous of that member and L is the length. So the equation for resonance can be re-written as: ω² = (AE)/(mL). This shows that the natural frequency is inversely related to length.
@zdravkozagorisek72488 жыл бұрын
Great experiment.
@rafaelzaltron83978 жыл бұрын
Muito bom!!!!!!!!!!!! Excelente demonstração.
@petermarkwood90773 жыл бұрын
I was looking for this video...thnx man
@bilalpisces19894 жыл бұрын
Awesome demo!
@KW42ON13 жыл бұрын
Really nice demonstration! THX
@alielmesawi92004 жыл бұрын
Thats brilliant i was looking for that
@TheAlaNStudio11 жыл бұрын
VERY GOOOOD DEMONSTRATION! THX!!
@CritCorner12 жыл бұрын
@NairoukhMouhannad (Sorry, hit the character limit). So, when we increase the length, the natural frequency shrinks. Inversely, decreasing the length with increase the natural frequency. This lab is demonstrating that effect.
@sherifnoor12 жыл бұрын
Very nice demonstration.
@konanblejustin8554 жыл бұрын
Tall Buildings have high fondamental vibration period (low frequency), so are more sensitive to low frequency shaking. Conversely, short buildings with low fondamental period( high frequency) are more affected with high frequency shaking...
@robelgeremew8343 Жыл бұрын
I think thats the main point here (to design our height based on the ground type or soil comdition )thanks! :)
@clintluna68847 жыл бұрын
Do you have any tests with varying width of same height object? How does larger width affect the resonance frequency? Thanks
@kenmount2944 жыл бұрын
I've seen this years ago. This guy was able to make an entire steel bridge vibrate by attatching this small device to one of the support beams. If he left it on there it would have been possible to eventually bring the entire bridge down.
@clintluna68847 жыл бұрын
Love this, thanks so much! Can you tell me the heights of these?
@ravindravipparthy42676 жыл бұрын
Very Good Presentation
@RekanKonstruksi3 жыл бұрын
Good experiment 👍
@elaundrymachine5 жыл бұрын
The flexibility of the tall one will let it stay together and not break as much, the middle one should mostly be affected because there was a study and medium sized buildings are mostly to break.
@user-xd6rh3lz1i Жыл бұрын
great demonstration. I was wondering if there is a method or an app that lets you measure the horizontal vibration against the vibration of the strings.
@MrArunbecivil859 жыл бұрын
it clear many doubts
@classic1960s14 жыл бұрын
Good Work
@deumnc Жыл бұрын
They showed your video on the news last night.
@woppats4 жыл бұрын
Hi! Can I use long parts of this footage (giving credits) for an educational video I will upload to my channel?
@locnguyen57532 жыл бұрын
This is better than any physics books
@Geliyor_Gelmekte_Olan7 ай бұрын
Thnx!
@sirsweatsnshades83065 жыл бұрын
Science is freaking awesome
@inrenav-campana17059 жыл бұрын
good demonstration that they have some of torsional vibration ?, thanks
@mekanikaengineerikatv10 ай бұрын
Very nice experiment: Natural frequencies are higher for shorter beams
@ad22468 жыл бұрын
Can you please tell us , you have captured this video,what is the frame rate of the camera?
@Isthatchicken0110 жыл бұрын
this is where dubstep is created
@TitleistGuy5 жыл бұрын
Seismic response Spectra explained without words.
@cengizipek51573 жыл бұрын
How?
@TitleistGuy3 жыл бұрын
Going through the analysis and developing your response spectrum you're essentially creating an envelope based on site conditions and building frame type. From there once the period is known you get your Ss, S1...and so on. If you picture these three models as different points on that curve it's easy to see how changing your period (direct function of frequency) can move you back and forth to the design S values. It's pretty neat if you ask me.
@cengizipek51573 жыл бұрын
@@TitleistGuy Thanks a lot :)
@topten70645 жыл бұрын
Great
@Wesnny016 жыл бұрын
will 2Hz (half) affect the tallest one?
@user-rj6ku1go8j3 жыл бұрын
So how frequency connected with magnitude of an earthquake ? I'm mean is there a type or something defines that or it's like a random thing ?
@dimvoly14 жыл бұрын
nice
@wanglipeng043010 жыл бұрын
so sick
@sharonsolana Жыл бұрын
Wow!
@realimpmen5 жыл бұрын
Those are like dancing buildings
@vegaspilot0314 жыл бұрын
amazing! i can't believe im seeing this on utube. tesla baby!
@MeepMeep885 жыл бұрын
Which one do girls like though?
@johnverney5 жыл бұрын
all of 'em
@WahranRai4 жыл бұрын
The one she enters into resonance and all her body vibrate !
@triple13 жыл бұрын
Whichever is the most expensive
@user-oe2xk6ud1y2 жыл бұрын
It depends on their natural frequencies, which is unique to every individual.
@1AayushSrivastava4 ай бұрын
Mine 😏
@antonglukhov3017 жыл бұрын
Is this a sine sweep?
@cashhcoww3 жыл бұрын
hell ya
@suzesiviter60835 жыл бұрын
What type of linear actuator is this, belt?
@nickmandarino82345 жыл бұрын
It looks like a lead screw stepper motor
@alexii6215 Жыл бұрын
If anybody knows, is it possible to purchase a machine like this and where to find one? Thank you!
@SuzhouChen7 жыл бұрын
Hallo JEM!
@Olleksandr8 жыл бұрын
Сколько надо Hz арочному, консольному, семипролётному мосту длинной - 684.5м. шириной - 28м. ЯП-расшатал.
@skylol4eg8 жыл бұрын
+ALEX XELA Не надо ЯП расшатывать) да и раскачивать тоже)
@NairoukhMouhannad12 жыл бұрын
Can someone explain to me why resonance occur for each particle separately . Does it depend of length of each one or what ??
@petermoravec4269 Жыл бұрын
Yes indeed
@sirMAXX776 жыл бұрын
Spin cycle activate!
@petermoravec42694 жыл бұрын
What is resonance?
@georgebeard23375 жыл бұрын
So low frequency earthquake is more danger to high building and high frequency is more danger to low building
@spartankongcountry67995 жыл бұрын
It is usually because the earthquake machine is so tired that it doesn't want to climb up the long tower anymore
@pewdiepieschair67395 жыл бұрын
You could even say it's... Dancing
@branislavmikac25543 жыл бұрын
Its same like earthquake affect to buildings
@Ultikiller4565 жыл бұрын
Holy fucking shit. Is this the technique that Tesla followed when making that supposed earthquake destroying invention of his? I think...?
@lvanvan2 жыл бұрын
Resonance = self frequency
@EpicBrah60008 жыл бұрын
How to survive earthquake : make really high skyscraper
@maks12a7 жыл бұрын
Minh Duc Dinh
@nizamieminov36487 жыл бұрын
How to survive an earthquake with a high frequency : Build taller. How to survive an earthquake with a low frequency : Build smaller. How to survive any earthquake : Live outside.
@Shaban_Interactive6 жыл бұрын
This shows kind of how H.A.A.R.P works with magnetic resonances.
@gabikit12 жыл бұрын
I feel sorry for the lead screw nut!
@attilamoka6 жыл бұрын
sembra il rumore della mia lavatrice quando è in fase centrifuga
@pkart84512 жыл бұрын
Earthquake resonances
@daviedpr11 жыл бұрын
hola
@getitup10011 жыл бұрын
Well isn't that interesting ,,,, I was watching japanese girls playing at the beach,,, I tell you I sure learn alot about stuff I never heard about before on youtube,,, now I think I will type in 56 chevy and see where I end up next!
@ForensicCats4 жыл бұрын
This is not a good test, he changes the speed of the push / pull arm and this exceeds the ''uprights'' ability to stay rigid. He basically, just found the limits of the metal based on the load and height of the design... Playing devil's advocate... I could argue that this is the side profile of a bridge that can ride on rails and the attached columns are ''free standing columns supported by two ''wire columns'' .... Totally, cannot think of a real World situation for this upright design... perhaps steel columns with a an unsupported span with a ''roof load''... So, NO lateral bracing ? Which building code would allow for this ? Especially, under the potential loading conditions presented? Again, he changed the speed of the arm and this reversal of direction is sudden on each end... it does a 180 degree about face! This creates a jerking motion that would probably cause shear failure long before this design would wobble as presented... I am bias on this... ( I like to disclose my bias position -- it helps to know you are bias and in that way, you can open your mind up to new data and possibly a new conclusion)... If, you want to comment or are triggered to reply to my comments... please do so, but please, do not add more data than what is presented by this video...
@b.83492 жыл бұрын
Actually this experiment should be tried as P and S type of waves like real earthquake.You can be right.And after watching this experiment I think why little houses which generally built 2 floors in Japan doesn't crush.
@joeeugene92213 жыл бұрын
bro what tf i just failed physics cus of u
@gconol11 жыл бұрын
Somehow, this gives me dirty thoughts.
@helesponto6 жыл бұрын
This shit is stressing.
@lg_noida69462 жыл бұрын
하... 시발
@rorororov7639 Жыл бұрын
Female Engineer - This is not a woman, this is not an engineer 😀😃😄