Here's the Australian spec for grid forming rather than grid following inverters. https://aemo.com.au/-/media/files/initiatives/primary-frequency-response/2023/gfm-voluntary-spec.pdf?la=en&hash=F8D999025BBC565E86F3B0E19E40A08E
I'd be very wary of using a reference that labels a force diagram as a stress diagram.
Anyway he's constructed a Cremona/Maxwell diagram . This is good. I'm not crazy about his notation, should have used Bow's.
The key to determining the forces in a and b is shown in the little triangle at the...
Each book will have a torsional rigidity (about the axis into the screen in your picture). As you stack them up there is a compressive load due to the weight of the books, and at some point you will get Euler elastic buckling, which for self weight was first correctly solved in 1912. This is...
Possibly, there again this will have the worst performance of any possible configuration except for flapping wings. People in the past have got into trouble for designing cruise missiles and the like (which is not very difficult if you are after minimum viable product performance), I think we...
In which dik either demonstrates a complete misunderstanding of %ages, or knows damn well what he is doing and uses them to mislead (a politer version of what I initially wrote). See post 132. The %age is dropping slightly, the coal use is increasing, as Tugboat said.
B&K produce an excellent series of manuals and technical notes on signal analysis in general and vibration monitoring. The HP/Agilent intro is also fine...
True but does not support your easily disproved claim. Their coal consumption is increasing. 95% of the coal power stations being built are Chinese. Here's the graphs for China
The Guardian spills the beans on new power stations in China (yes they are retiring a few as well)
https://www.theguardian.com/world/2023/aug/29/china-coal-plants-climate-goals-carbon
I wonder why dik keeps pushing this lie. It is easily refuted. Here's what the AI thingo says
China is the world's largest coal consumer, using more than half of the global total. While coal consumption has been relatively stable in recent years due to slower economic growth and government...
It's cheap and easy apparently https://yle.fi/a/3-10736252 . No mention of the costs of storage or transmission lines.
You can do it in Kazaqkstan Transition towards a 100% RE-based energy system was modelled for five scenarios considering different energy system structures, from a limited...
"Another reference.. slightly different equation"
That word slightly is doing a LOT of work. Consider the case where mu=1 and alpha = 45 degrees. (this makes me think the - sign in the denominator is correct)
In South Australia's case (2016) they installed natural gas generators, and hospitals and the like added emergency generators. It also flushed out the errors in configuration of the software for the windfarms. Since then they've also built another interconnector back to the coal powered NEM as...
So I've got 5 spring/masses in series, dropped from 1m.
SDOF approximation using Gautam's equation
m1dof = 1.0103
k1dof = 3.9898e+08
freq1dof = 3162.8
h1dof = 1.0000
Force1dof = 8.8931e+04
max force at ground from 5dof model
ans = 9.7014e+04
So this ties up reasonably well with the FEA...
Well yes, in your dynamics textbook or lecture notes.
Here's a long article that manages to avoid using differential equations, but only because he uses FEA to derive the correct equivalent mass.
https://blog.ozeninc.com/resources/anatomy-of-a-mechanical-impact
