永磁体磁场分布的解析研究.doc

毕 业 设 计（论 文） 永磁体磁场分布的解析研究 专业年级 02级工程力学 学 号 02042218 姓 名 江 晨 曦 指导教师 苟 晓 凡 评 阅 人 二六年六月 中国 南京摘要从分子环流模型出发，利用毕奥-萨伐特定律，对于仅在一个方向均匀完全充磁的矩形永磁块体，导出了其外部空间磁场分布的解析表达式。在此基础上，本论文着重针对五块矩形永磁体空间对称放置的情况，给出了其外部空间磁场分布的解析表达式。利用此解析公式，定量研究了三个磁场分量，及的空间分布并进行了充分分析和讨论。该解析式能精确描述一块至多块矩形永磁体外部空间的磁场分布。关键词：永磁体；磁场分布；解析表达ABSTRCTFrom the molecular current viewpoint, an analytic expression exactly describing magnetic field distribution of rectangular permanent magnet magnetized sufficiently in one direction was derived from Biot-Savarts low. This thesis is stressed in accordance with five circumstances that the symmetry in rectangle permanent magnet space was laid up on this foundation, and the person who gave out his outside space magnetic field to distribute separates to divide the type expressed. Using this resolution formula, the distributions of the three magnetic field weights fixed quantity ， and was studied .Advance lines are fully analyzed and are discussed. This expression is useful not only for the case of one rectangular permanent magnet bulk, but also for that of several rectangular permanent magnet bulks. Key Words: permanent magnet; magnetic field distribution; analytic expression 目录第一章 绪论1.1永磁体的应用领域及研究的必要性1.2 磁场分布研究的进展与方法第二章 基本方程 2.1 单块矩形磁体磁场磁感应强度的解析表达式 2.2多块矩形磁体（5块）磁场磁感应强度的解析表达式第三章 数值计算结