With systems composed by HTS bulks and permanent magnets more and more complex, a simple and reliable method to approximate the interactions between them is urgently needed.

• 摘要HTS块材电磁机构日趋复杂，为了实现系统结构和电磁设计的优化需要建立一种简单可靠的方法来估算系统内部的相互作用。