A Country Physicist

[Bibliophage]

It was (and continues to be) a very interesting challenge. There is an empirical model,

standard in the industry, called Pajecka [sic]. It has 15 parameters for lateral slip,

and 11 parameters for longitudinal slip. All these parameters are measured

in the lab, and can account for everything from dragline tires to formula-1

tires (google "dragline" I wrote a bit about Pajecka here:

 

https://www.dropbox.com/preview/brian/brian/brian/physics_of_racing/Beckman_-_The_Physics_of_Racing.pdf

 

(parts 21, 22, 24, 25, and 29)

 

There are other approaches, the most interesting of which being that from Rigs of Rods

 

https://www.rigsofrods.org/

 

They can simulate tires as trusses of damped harmonic oscillators (DHOs). Lord in heaven,

everything is DHOs! Circuits! The Bohr atom! Planck foams! Probably even black holes and

neutron stars if I ever make the time to catch up on them.

 

Nowadays, I would go for machine-learning to build up kick-a$$ tire models.

I'd be shocked if the pros weren't doing that.

I tried grabbing the PDF - it routes to my dropbox, and says that the file/folder doesn't exist.

 

(So, everything is DHOs? So, this guy knows all the secrets to the universe! Well, maybe not why women need all those shoes.... )

[rebcabin]

I've gone over to the Dark Side and blown my kids' inheritance on Namiki Emperors. It's a one-way door. That's an Urushi Black in the middle and two Urushi vermillions, one on either side.

Edited October 24, 2019 by rebcabin

[Parker51]

No, you have actually simply diversified your holdings so as to adress a variety of new investment challenges brought on by the changes in the global economy.

[Bibliophage]

No, you have actually simply diversified your holdings so as to adress a variety of new investment challenges brought on by the changes in the global economy.

You work in marketing, don't you?

[1nkulus]

You have successfully entered a rabbit hole, who knows what it'll yield and where it'll lead.

Enjoy the fascinating journey and feel free to ask/share...

 

[rebcabin]

I tried grabbing the PDF - it routes to my dropbox, and says that the file/folder doesn't exist.

 

(So, everything is DHOs? So, this guy knows all the secrets to the universe! Well, maybe not why women need all those shoes.... )

 

I recently discovered that ECONOMISTS use the same math we physicists use.

 

Imagine a circuit with resistors, capacitors, inductors, maybe even op-amps, transistors, diodes. Now substitute the word "dollar" for the word "electron" and, suddenly, AHA!

 

btw, the economists analogy for a "diode" is the Internal Revenue Service