|
Abstract: The theory research on electromagnetic forming is related
to electromagnetics and plasticity dynamics. Of all the problems,
magnetic pressure calculation is the basic one. FEM (Finite element
method) is an effective method in enhancing the accuracy of magnetic
pressure calculation. But for the FEM, how to confirm the solving area
and magnetic field characteristic on the boundary is the key problem.
The symmetry of magnetic field characteristic in the condition that
workpiece and forming coil are placed coaxially is calculated by
analysis. According to the result of magnetic field characteristic, the
solving area of FEM is decided and the magnetic field characteristic on
the boundary is presented. Then, the magnetic field and magnetic
pressure distribution of solenoid coil and echelon coil are simulated by
means of FEM and the magnetic pressure distribution is verified by
electromagnetic bulging experiment.
Key words: Electromagnetic bulging Finite element method Magnetic
field characteristic Magnetic pressure distribution
CLC No: TG391
国防科技预研基金资助项目(00J18.4.5HT0132).
Received 20040719, received in revised form 20041108
|