圆坯凝固末端电磁搅拌电磁场的数值模拟

以某厂圆坯凝固末端电磁搅拌器为研究对象，建立了圆坯凝固末端电磁搅拌的三维数学模型。利用有限元软件ANSYS对电磁场的分布规律进行了数值模拟，研究了不同工艺参数对磁感应强度和电磁力分布规律的影响。研究结果表明：当电流频率为8 Hz，电流强度从100 A增加到400 A时，搅拌器中心处的磁感应强度从19.5 mT提高到77.9 mT，中心横截面上切向电磁力的最大值从115 N/m3提高到1 837 N/m3。当电流强度为300 A，电流频率从4 Hz增加到12 Hz时，搅拌器中心处的磁感应强度从60.3 mT下降到55.6 mT，中心横截面上切向电磁力的最大值从550.2 N/m3提高到1 501.8 N/m3。

Numerical simulation of electromagnetic field for round billet with final electromagnetic stirring

A three-dimensional mathematical model of final electromagnetic stirring (F-EMS) for round billet was established. The influence of different process parameters on magnetic flux density and electromagnetic force (EMF) was studied by ANSYS software. The results show that when the current intensity increases from 100 A to 400 A at 8 Hz， the magnetic flux density at the stirrer center increases from 19.5 mT to 77.9 mT， and the maximum tangential EMF on the cross section of the stirrer center increases from 115 N/m3 to 1 837 N/m3. When the current frequency increases from 4 Hz to 12 Hz at 300 A， the magnetic flux density at the stirrer center decreases from 60.3 mT to 55.6 mT， and the maximum tangential EMF increases from 550.2 N/m3 to 1 501.8 N/m3.