摘要
对管件电磁缩径的磁场力和动态变形进行了耦合场FEM数值模拟。应用ANSYS计算作用在管件上的瞬态磁场力,然后以该力为边界条件模拟工件高速变形,实现管件变形与磁场力之间的耦合。研究结果表明,作用于工件的磁场力及其径向变形分布不均匀;工件变形可以间接说明磁感应强度和磁场力的分布;工件变形较大时,全耦合模拟结果较半耦合模拟更合理,而变形较小时,二者模拟结果相近。管件变形的模拟值与测量结果吻合较好。
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.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第7期231-234,共4页
Journal of Mechanical Engineering
关键词
电磁成形
耦合场
数值模拟
磁场力
缩径
Electromagnetic forming Coupled fields Numerical simulation Magnetic force Tube-compression
