用虚位移法计算静磁场中磁介质的受力

用虚位移法计算静磁场中载流回路的受力是比较容易理解的，因为两个公式都是针对载流回路体系的情况给出的，本文给出了用虚位移法计算静磁场中磁介质受力与用虚位移法计算静磁场中载流回路受力的关系，从而说明了静磁场中磁介质受力的本质，阐明了静磁场中磁介质受力的计算可直接应用静磁场中载流回路受力公式的原因，给出了计算磁介质受力时可以运用计算载流回路受力公式的条件，并给出了具体的例子进行说明．使磁介质受力的计算变得明白、易懂．

The Computation of the Magnetic Materials in Magnetostatic Field with Virtual Displacement Method.

The computation of the current loop stress in magnetostatic field is quite easy to understand with virtual displacement method because two formulas hoth are produced for current loop system. This article presents the relation of the stress computa- tion between the current loop system and the magnetic material system with virtual displacement method in magnetostatic field, thus explained the magnetic material stress essence in the magnetostatic field. Including that, the article gives the reason that in the magnetostatic field the magnetic material stress computation may directly apply in the magnetostatic field the current loop stress formula. The condition when the computation medium stress may utilize the computation current loop stress formula is deduced. The specific example is given to explain that.