You skipped the whole part about the local government running their finances into the ground, repeatedly refusing to cut anything and wanting the state to pay for everything.
It wasn't resonant with the wind. It was resonant with the aero forces generated by the twisting bridge.
It all depends on what you define as the 'forcing function'.
None of this is news. Nobody ever said the wind was gusting at the same frequency as the bridge. It's always been understood what happened.
I put this whole thing down to reddit morons splitting hairs.
Complete aside. The state employee that was supposed to buy insurance on the bridge pocketed the premium, until it started to really gallop. If it had stayed up another day, he would have gotten away with it.
Aeroelastic flutter is only a problem when it happens at the resonant frequency of the underlying physical object.
Like when the forces are a consequence of the original motion.
The bridge was torquing at it's center span's natural frequency x 2 (IIRC).
Saying this wasn't resonance because the forcing function was a product of the oscillation in the first place is pedantic. Yes it was flutter, but destructive flutter is a resonant phenomenon.
With all the normalizing to 100, 10 per standard deviation etc you can bet there has to be a rounding step right at the end. So nobody (or almost nobody) gets _exactly_ 100.
Also at some point the really low scores are institutionalized. Hopefully not voting.
You need to get out of America, at least once in your life.
1953 is not 'ancient' housing. Most pipes in 1953 were steel. The 60 were the start of copper soldered piping being common. Lead solder was not legal for plumbing in 1960. Silver solder is not that expensive, it's not pure silver.
Further most plumbing has an expected life of 40-50 years. After that it's limed up and has to be replaced. Depends on the local water.
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That's just the construction unions jinning up more work.
The truth is that infrastructure spending is misallocated, not too small, spent on stupid things. Usually to payoff the construction unions.
By the feds. Who don't write building codes.
It was prohibited way before that and it use unheard of by plumbers.
Your right of course. My bad.
There are many cities where 40 years is what you get from pipes. With the last 10 being low flow.
You skipped the whole part about the local government running their finances into the ground, repeatedly refusing to cut anything and wanting the state to pay for everything.
Only after the local government is hopelessly fucked on their own.
The clean water act was never intended to be a substitute for building codes and wasn't.
I learned to plumb before 1986 and lead solder in plumbing was unheard of and banned by building code.
It is.
But the forcing function was a product of the motion and didn't have it's own freqency. Which makes it flutter.
Now...wait for it...flutter is an example of resonance.
Just the salvage rights.
It was twisting in the at n=2 on the center span. Did you watch the video?
It wasn't resonant with the wind. It was resonant with the aero forces generated by the twisting bridge.
It all depends on what you define as the 'forcing function'.
None of this is news. Nobody ever said the wind was gusting at the same frequency as the bridge. It's always been understood what happened.
I put this whole thing down to reddit morons splitting hairs.
Complete aside. The state employee that was supposed to buy insurance on the bridge pocketed the premium, until it started to really gallop. If it had stayed up another day, he would have gotten away with it.
Aeroelastic flutter is only a problem when it happens at the resonant frequency of the underlying physical object.
Like when the forces are a consequence of the original motion.
The bridge was torquing at it's center span's natural frequency x 2 (IIRC).
Saying this wasn't resonance because the forcing function was a product of the oscillation in the first place is pedantic. Yes it was flutter, but destructive flutter is a resonant phenomenon.
Balances Minnesota, where the Republicans are Democrats and the Democrats are Communists.
Sense TV and woman's suffrage the taller candidate with the better hair wins.
We can't get rid of TV, so we must end woman's suffrage.
With all the normalizing to 100, 10 per standard deviation etc you can bet there has to be a rounding step right at the end. So nobody (or almost nobody) gets _exactly_ 100.
Also at some point the really low scores are institutionalized. Hopefully not voting.
Price of beer in Germany is the one thing that makes me want to exercise my dual citizenship and vote with my feet.
It's good beer too. As good as anything you can get in America (but not better, except that it's much much cheaper).
I couldn't live surrounded by such a bunch of law abiders though.
It's apparent to me that any politician suggesting taxing beer in Germany would be voted out in a second. Third rail of German politics?
At this point I assume you posted the last 4 SC/NC posts yourself.
See what happens when idiots don't even bother reading the other comments. I know RTFA is verboten...
I learned to plumb copper before 1980. We did not use lead solder back then.
Capitalism thrives on greed, socialism falls to it.
Neither eliminates it.
You need to get out of America, at least once in your life.
1953 is not 'ancient' housing. Most pipes in 1953 were steel. The 60 were the start of copper soldered piping being common. Lead solder was not legal for plumbing in 1960. Silver solder is not that expensive, it's not pure silver.
Further most plumbing has an expected life of 40-50 years. After that it's limed up and has to be replaced. Depends on the local water.
On the other hand we do get to name them.
It's not Fraunce it's FrAnce etc
True, but emergency managers are only put in after the locals make a mess of things and show they aren't even trying to fix anything.
So it's a local problem with idiots to cheap to use silver solder on their pipes?
Water mains aren't generally copper or soldered.
Tell us more of Flints election process. How do outsiders get to vote?
None of what you say changes basic facts on the ground. They made a mess and now the feds are picking up the tab.
Are 'rich mother fuckers' also responsible for the broken governments in DC, Detroit, Philadelphia, East St. Louis?
Each one will run much, much slower.