An expert structural analysis of the recent wind turbine tower collapse in germany

[@oliverrasst1012]

you cant be serious, those wind turbine towers are built by the thousands around the world and the design is still subject to research? why is the design so complicated that is has not been figured out yet

[@hnrwagner]

the way imperfections of the shell surface have to be considered is not correct in my humble opinion that was also the result of the paper

[@BasementEngineer]

@@hnrwagner Here in south-west Ontario are hundreds of such wind mills along the shores of Lakes Erie and Huron. Haven't heard or read of one collapsing, yet.

[@hnrwagner]

Unfortunately I had to edit the video and cut some segements (about 83 seconds) due to copyright, how pathetic to copyright strike me for an educational video

[@ChadDidNothingWrong]

@@77thTrombone copyright needs to be abolished. People treat it like patent law, but it's nothing of the sort. The fact that even multinational retail chains can rarely afford more than 35 songs in their store playlists should make the problem very clear.

[@hnrwagner]

And some say I only do clickbait Oceangate videos ! I can also upload clickbait wind turbine tower videos ;)

[@matthewmutz9337]

You are not Clickbait

[@Reach41]

Your stuff isn’t click bait.

[@tdsangel]

diese Windkraftanlagen stehen halt in großer Stückzahl überall. Da haut es immer mal wieder eine um. Der primäre schaden des Generatorkopfes hat später den Schaft kollabieren lassen. Ist nicht die erste Anlage, die sich nicht aus dem Wind drehen konnte, oder die ihre maximale rotordrehzahl überschritten hat und dann kollabiert ist. Was willste machen - passiert halt. Wenn in kritischen Defektsituationen die Materialgrenzen überschritten werden - was willste machen? Man hätte den Kopf notsprengen können. Wäre für den Effekt sicherlich noch etwas geiler gewesen ;)

[@fuglbird]

This was certainly of higher quality than your Titan calculations. But then again the boundary conditions were simple for the tower.

[@hnrwagner]

@@fuglbird I take that as a compliment

[@hnrwagner]

Timecodes: 0:00 - Intro with relaxing wind sound 0:52 - Wind Turbine Tower hit by Thors Hammer 1:16 - Rotor of the Tower cannot yaw 1:30 - Tower Buckling 1:57 - General Info on Wind Turbine Towers 2:31 - Tower Failure Modes 2:46 - Tower Buckling Simulation 3:20 - The problem with shell buckling 4:27 - Why I am an eggspert and you are not 5:06 - my PhD thesis 5:31 - my KZbin Channel Overview 6:10 - my Github page ! 6:37 - Become a Patreon ! 6:50 - Tower Collapse simulation #simutainment #hnrwagner #simulia www.patreon.com/posts/oceangate-titan-85704969?Link& References: Tower Video: kzbin.info/www/bejne/aaTCcndpqMyFocU Paper 1: www.sciencedirect.com/science/article/pii/S135063072300078X PhD thesis: www.researchgate.net/publication/337465846_ROBUST_DESIGN_OF_BUCKLING_CRITICAL_THIN-WALLED_SHELL_STRUCTURES Github: github.com/hnrwagner Google Scholar: scholar.google.de/citations?user=a4sKEKsAAAAJ&hl=en

[@masihamini313]

Mechanical man. Appreciated sir

[@oscodains]

This is really interesting, I wouldn’t have expected a wind turbine to fail like that.

[@shubhamjain8157]

Doctor you are doing such a great job. We can see real problem analysis using FEM technique. I am also learning from your videos and trying to touch on another area of research like structural fire design but facing some challenges in writing UMAT and USDFLD subroutines having temperature variables. Thanks by the way

[@zainofficial1668]

Thank you so much Dr. Ing for sharing the videos with reference articles. It is really helpful for research students. Can you please make a tutorial video related to prestressing of strands in a prestressed concrete beam?

[@vezenik6059]

I don't think his name is Ing.

[@BasementEngineer]

Mr Wagner's professional title is Doktor Ingenieur (Dr Ing). In Germany people are picky about being addressed by their titles. My father's employer was awarded the honorary title of Doktor by the local university to which he probably contributed some serious cash. This worthy insisted on being addressed as "Herr Doktor", which my father detested. In North America one would be laughed out of the room if one insisted on such nonsense. Here, with very few exceptions, everyone is addressed by their first name.

[@FIGHTTHECABLE]

Change the tower shape or strengthen the inside.

[@pyalot]

The safety margin may be too small, but damage to a blade may also introduce imbalance and inability to orient can lead to uneven forces across the rotor. When these extra loads hit the low safety margin, the shell fails.

[@tdsangel]

how much safetymargin has to be implemented under which conditions? the main point of failure seems to be the unability of the machine to "turn out of the wind". the speed of the imbalanced, because damaged propellerblades is much too high. it is nearly impossible but also uneconomical to build structures stronger than needed for the "one of 10000 cases". as long as we build these things in numbers, they will crash now and then.

[@pyalot]

@@tdsangel I suspect this failure is of an old unit they would have decomissioned soon anyway. Modern units have failsafe rotor breaks and automatic management systems that monitor a dozen parameters like acceleration, temperatures, noise, etc. to detect out of bounds operating conditions and phone in maintenance.

[@theonlyqwert]

if you wanted to gather measurements of the structure during maintenance cycles to try and predict this happening prior to it actually happening. what sort of measurements would you want and where on the structure? surely there must be a way to model this and develop a predictive model.

[@defendermodsandtravels]

This subject is well understood. Perform a proper dimensional survey to high accuracy, include this in the analytical model and you should be able to predict the failure load. However there will be a lot of uncertainty about the applied loading with a damaged turbine blade and maybe vortex shedding too.

[@BasementEngineer]

Well, the wind mill tower failed due to one or more of these reasons: 1) faulty design, which includes the design basis for storm loading and earth quakes, plus dynamic loading due to slewing of the sail and power plant assembly; 2) faulty manufacturing, including material selection and welding not to specifications; 3) faulty construction and erection, including inappropriate fasteners and their installation

[@drury2d8]

out of balance or a brake failure

[@tdsangel]

no. the mechanical issues of the generatormachine, the brake, the rotation "out of the wind" lead to an overload of the tower.

[@BasementEngineer]

@@tdsangel Agreed. That was predictable and should have been considered during the design phase of the project.

[@yellowgreen5229]

It is not a mill.

[@BasementEngineer]

@@yellowgreen5229 Why not?

[@jensschroder8214]

ist das jetzt Eigenwerbung oder sollte das Info werden?

[@hnrwagner]

Besides

[@oliverrasst1012]

@@hnrwagner ich glaube er meint "beides" lol

[@MOTOCKOT]

нужно с бетона делать. но это дорого.

[@hnrwagner]

Beton kann man auch nicht so hoch bauen wie Stahl

[@Christian-xb8ze]

Viel zuviel eigenwerbung. Und dieser deutsche Akzent :D

[@GraemeGunn]

They're too big. There needs to be a way to capture the energy from the wind without those things being just strangely huge. There's got to be a better design. Also, if you find one failing, how do you maintain it? Do you just demolish it and build a new one?

[@hnrwagner]

I don't like those ineffective and ugly bird shredders one bit, better a modern thorium reactor which is multiple 100 times better that those things

[@Vladimirthetiny]

@@hnrwagneroffshore placement might be more acceptable?

[@soeren72]

It's like a restaurant, never trust one that needs to pull in the customers, Never trust an engineer that uses half the video explaining how good he is. Try being a bit more humble. It's a better look.

[@hnrwagner]

I actually dont like it either yet but due to copyright infringement I had to cut a lot of stuff from the video, the video was better before the cut