Re: forced vibration question

From: Y.Porat (maporat_at_012.net.il)
Date: 09/21/04 

Date: 20 Sep 2004 23:07:07 -0700

Bjoern Feuerbacher <feuerbac@thphys.uni-heidelberg.de> wrote in message news:<cimbp0$54u$1@news.urz.uni-heidelberg.de>...
> Y.Porat wrote:
> > Bjoern Feuerbacher <feuerbac@thphys.uni-heidelberg.de> wrote in message news:<cijvmm$jgq$1@news.urz.uni-heidelberg.de>...
> >
> >>Y.Porat wrote:
> >>
> >>>Bjoern Feuerbacher <feuerbac@thphys.uni-heidelberg.de> wrote in message news:<cihbas$3lv$1@news.urz.uni-heidelberg.de>...
> >>>
> >>>
> >>>>Y.Porat wrote:
> >>>>
> >>>>
>
> >>
> >>>>Huh? In what way does it "evade" the quake?
> >>>
> >>>i could say here i amnot your spoon feeder but anyway:
> >>>there are buildings for instance in Japan and California:
> >>>in which springs are entered into their foundations
> >>>and if you know something about that scince
> >>>the right springs in the righ tplace is causing the building
> >>>*to evade the EQ*
> >>
> >>Oh, you meant buildings specifically designed for resisting quakes!
> >>Above it sounded as if you meant that *every* building can do
> >>this "evading".
> >
> > ---------------
> > yess
> > even with no springss
> > it can have substidudes to springs
> > but i am not going to get into it
> > the springs wwere just an example to show you how complicated
> > is that issue much more than you immagined.
>
> I notice that you *still* have not supported your assertion
> that a growing force is *necessary* for resonance.
--------------
1 just keep in mind that i owe you anything
but is you ask nicely i will reply?
take the qm example:
the force that causes a biliding resonance is growing with thime
why?
because
1 you should know that the potential forces of qm
are actuaslly so big that no building can survive it
the luck is that as i sayed the building is evading
in most cases those strong forces that are unimaginary strong
now
during that eq wile starting to vibrate
the stiffness of the building
or more correctly the *reactions to those forces*
becoming bigger!!
in a very simplified way due to say Hooks law
so the actions of eq on it become stronger etc etc
in a mataphoric way:
if you punch air there is no resistance so you have a small
action and a small reaction
but if you punch a wall (dont try it ...)
both the action and reaction are bigger
and the stiffer the wall the stronger raction
i hope i tuoched something of your question.

in 2 minutes thinking
it is a 'coffe talk ' remember??..
so dont drag me to courth if i am not acurate...
----------------
---------------
-
>
> Hint: providing examples where a growing force indeed causes resonance
> is not support for that.
-----------
???
i think we live on examples.
>
>
> [snip]
>
>
>
> >>>>>you donr get even the geomerty!!
> >>>>
> >>>>I have seen swings quite often. There is no asymmetric motion.
> >>>>What on earth are you talking about?
> >>>>-------------
> >>>
> >>>Ghosh
>
> >>No. In all cases I've ever seen, and done myself, the parent *does*
> >>indeed "withdraw", i.e. go backwards. So the motion does *not* become
> >>asymmetric.
> >>
> >
> > ---------------
> > stubborn idiot
>
> Why I am stubborn when I tell you that what I have seen myself
> contradicts your assertions?
---------------
ask other people to think about it
it involves the simplest geometry:
if the amplitude becomes larger than at the beginning!!
and the parent stands in his orriginal position
the sway is such:
the distance between parent nad th vertical point
that was once the line of symetry
and the parent...
is samller than that from that line of orriginal symetry
and the far 'stand still still poit'
sorry that we have not drawing tools here
but you could do it youself if you were more maticulate
as you generally tent to be
(but if it will suport my point and make me right..
you will never alow it
 i am not from Hedelberg
and your country.that is a mild way to say ...... stop.
dont say.be polite.
---------------
---------------

>
>
> >>Nothing I say here in the newsgroup could ever hurt my job. So
> >>I don't have a disadvantage here.
> >
> > i donr believe you
> > it might hurt you reputation
> > and you are afried of it
> > it is obvious!!
>
> How on earth would anything I say here hurt my reputation? Do you think
> that my employers regularly check what I write in the newsgroups,
> or what?????
-----------
your pupils (God forbid ) might see it!!
anyway i suggest you adopt my attitude
to this ng as a 'coffe talks'
it is much less obliging and sometimes more effective....
coffe talk means even if you were wrong no big deal
ie you didnt invest in it too much thinking!
-----------
---------------
 
> I *suggested* that to you. What on earth has that to do with
> acting as "thought police"?
>
> May I remind you that *you* *required* of me several times that
> I should stop responding to your posts? *That* is an example of
> acting as "thought police"!
no you werenot responding
you are leeching and it makes a difference.
and btw i cant demand you to stop answering
it was never a demand because i cant demant
it was a request a wish.
a reasonable personality is responding to such a request!1
i can onlt try a nd convice you not to haunt me
> ---------------
>
>
> >>>physics was always made advance by *trial and error*!!
> >>
> >>Roughly right. However, the crucial point you keep missing is
> >>realizing that you have made an error.
> >
> > ----------------
> > shamelss nazi croock
>
 
> > no i never syed that
>
> You implied just that above.
>
>
> > i sayed the opoposite that i am a crank
>
> Depends. When it suits you, you say that you are a crank. But as
> soon as the evidence contradicts you, you pretend that all the
> scientists who analyzed the evidence misinterpreted it, and that
> in reality your interpretation is the right one. I.e.: you act
> as if you were more clever than all those people.
--------------
no i am not too cleaver
yet othrs are in many cases not cleaver than me
but they dont realise that they are crankes as well
-------------
>
>
> > so *you are lier*
>
> Asking a question makes me a liar?
----------
asking questions is rather your good part
but bestowing insulting titles and labels
is your bad part
-------------
>
>
>
> >>*You* keep insisting that the pendulum is a *special* system*.
> >>OTOH, *I* keep using the *general* definition for "external force".
> >>--------------
> >
> > imbecil
>
> I notice that you can't refute my argument

nothing will do. if you dont get it.
>
>
>
> >>>no even now i offer again a cease fire
> >>>all reders could notice how nmany times i suggested it
> >>>and you (from your claculations) evaded it
> >>>you could say simple
> >>>ok i accept it
> >>
> >>I accept it as soon as you stop calling hundreds of thousands
> >>of physicists, including me, "parrots".
> >
> > ----------
> > disturbed imbecil
> > no one nominated you as others guardian
>
> 1) For the 100th time: I need no nomination for that.
> 2) Did you miss the "including me" above?
------------
 he common paractice is
that you are not obliged to attack me
if a call someone else - parrot
the common usual normal practice is that you leave it
to the one a addresed to.
you are not the knight on the horse defending
youg fragile ladies
btw non of them is so fargile at all
they know to respond and dont need you defence!!!
---------------
------------------------
-----------------
 
>
> > the nazies told others what to do and what to think
>
> 1960 points.
>
>
> > the bolshiviks as well you belong to that education
> > and you are nothing more than the
> > FERTZ inventor donrt forget it
> > that is innovation ability!!
> > not to the democratic world.
> >
> > and you are nothing more than the
> > FERTZ inventor donrt forget it
> > that is innovation ability!!
>
> Man, you *really* hate me.
-----------------
sometimes
for my health it is not good to hate for too long
blood pressure- you know ....
but i am not jesus christ to lent hios other cheeck
for a slapp.
-------------
-------------
>
>
>
> >>Unfortunately, you will never agree to that.
> >
> > of couse not
> > see above little dumn dictator
> > you can demand only about the relations between me and you
> > nothing more !!! got it ??
>
> Well, what about if you stop calling me a "Nazi", "Goebbles",
> a "liar", a "moron", a "parrot", an "imbecil", etc.? Would be
> a good start.
--------------
ok have we a deal ??? and you dont call me a crackpot etc !
only me will call myself a crackpot while i feel like it.
and not an inferiour engineer wetc etc
i know generally when i am inferiour no need for you to tel me.
------------------
 
>
> > it seems that your your real motivation and *intersts*
> > are to fight with me
>
> For the 1000th time: my motivation when answering your posts
> is correcting your errors. If you take that as personal attacks,
> that's your problem. I call that "paranoia".
---------------
on one condition :
that you will say :
IMHO you are wrong
ok?
---------------
 bye
Y.Porat

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