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Abstract: The
magnetic forces and dynamic deformation analyses for tube-compression by
electromagnetic forming are performed by coupled fields FEM numerical
simulation. ANSYS is used to calculate the transient magnetic forces
acting on the tube, which are used as boundary conditions to model the
high velocity deformation afterwards. And coupling is realized between
electromagnetic field and structural field by updating the tube geometry
and the magnetic forces. The results show that distributions of the
magnetic forces acting on tube and the radial displacement of tube
opposite the coil are not uniform; the distributions of magnetic flux
density and magnetic forces can be explained indirectly with the tube
deformation; the results of coupled fields numerical simulation are more
reasonable than that of half coupled simulation when the tube
deformation is bigger, and both results of the two methods are
approximate when that is smaller. The final tube shape of simulation
agrees well with that of experiments.
Key words:Electromagnetic
forming Coupled fields Numerical simulation Magnetic force
Tube-compression
CLC No: TG391
Received 20050918, received
in revised form 20060218
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