摘要
研究考虑铁磁介质饱和时基于有限元和虚位移原理的局部电磁力算法。该法将虚位移原理推广应用于有限单元的节点,从而得到用以描述局部电磁力分布的等效节点力。所得公式不仅能同时计算出铁磁介质内部及表面的电磁力,而且能避免麦克斯韦应力法计算局部力时遇到的场量不连续问题。对实例汽轮发电机不同负荷工况下的计算表明,该法具有较高的计算精度及广泛的适用性。
A method for the computation of local magnetic force in saturated ferromagnetic materials is proposed, based on FEM and virtual work principle. The distribution of local magnetic force is described with an equivalent node force,which is derived from an extended application of virtual work principle to FEM node.The method can not only calculate the surface and volume force of ferromagnetic materials, but also avoids the problems of discontinuities in field quantities which Maxwell stress tensor method inevitably to be confronted with. Application shows it has good accuracy and extensive applicability.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2007年第15期47-52,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50677019)~~
关键词
虚位移
局部电磁力
等效节点力
有限元
virtual work
local magnetic force
equivalent node force
FEM
