Calculating Halbach Array force

[G00s]

So I'm thinking of this shock absorber involving magnets, but to reduce the weight as much as possible, I thought about using a halbach array of magnets to be able to repel as strongly as possible with the least amount of weight.

The only problem is that I haven't got a clue as of how to calculate how strong a halbach array would repel something!

So, are any of you familiar with the concept?

 

[G00s]

Oh and I forgot; Is it possible to set up a halbach array with non-cubical magnets?

 

[MagMike]

From your other postings, this appears to be a hobby-related idea.
Check out this thread:
thread340-197537

 

[G00s]

Thanks for the reply, but that thread doesn't really concern the subject of halbach arrays, unless I missed something :S

 

[IRstuff]

magnetic force --> r^2 --> increasing jerk
spring --> r --> constant jerk

The degree of jerk would be unacceptable for most applications

TTFN

FAQ731-376

 

[Clyde38]

What about Magneto-Rheological (MR) Suspension? Then you have control of the suspension.

http://www.lord.com/Home/MagnetoRhe...Applications/MRDamper/tabid/4189/Default.aspx

A theoretcial equation for the magnetic flux density (B) inside a two pole Hallbach Array is (Flemming Buus Bendixen/Anette Norskov Shultz):

B=B_r*log(R_o/R_i)
where B_r is remanence of the magnet
R_o is outside radius and R_i is the inner radius of the magnet array.

[link

http://www.linkedin.com/in/clydehancock

]

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[G00s]

Well, I was kind of thinking of a non-cylinder halbach array, I did this quick inventor render. (note: Ironically enough, I think I put the arrays in the wrong direction...) So the springs would keep the magnets at repel-floating distance constantly, and when force is applied on the upper [transparent] part, the spring is first compressed, and then the magnets do their part.

I'm not sure if it would have any effect, but it would help if I could actually calculate how much [non-cylinder] halbach arrays repel!

So thanks for the suggestion Clyde, but it was a slight miss in the description there