Magnetic attraction between conductor and I-beam

[tpgjas]

How does one calculate the attractive force between a conductor carrying a DC current and some nearby steel? We have a bus bar carrying 25000 amps next to a steel I-beam and need to figure out how much bracing we need to put between the two.

Thanks in advance for any help.

 

[MagMike]

There's no simple equation. One usually resorts to finite element modeling in a situation like that.

 

[electricpete]

Equation 6.3 here gives the force between a conductor and a steel plate. This could serve as an upper bound for the forcew between a conductor and an I-beam at same distance

http://www.consult-g2.com/course/chapter6/chapter.html

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