sound-silence 发表于 2009-12-16 01:08

如何查看三种电磁力

电磁力按计算方法不同有安培力，虚功力，maxwell力，magnet后处理中只能看到力的结果，但是不知道是用哪个方法计算的力，magnet后处理中能查看上述三种力吗？

aice2001 发表于 2009-12-16 15:54

magnet 计算力是用虚功原理计算。

sound-silence 发表于 2009-12-16 18:46

回复 2# aice2001
感谢你的回复，也就是说只有一种力了。。。

yangxiaoyan01 发表于 2009-12-24 04:34

用虚功计算的比较精确，但是计算公式复杂
用麦克斯韦应力张量法推导公式简单，但是对积分路径比较敏感
用这两种方法计算，理论上应该差别不大，但是计算的结果差别还是不小。不知道为什么
magnet软件用的是哪种方法，我也想知道，请知道的朋友给个计算公式

flyingmind 发表于 2009-12-24 10:18

虚功法与张量法计算结果应该相差不大说明网格剖分的好，否则至少有一个结果与实际结果相差大

soshuai 发表于 2010-1-4 23:38

用虚功计算的比较精确

xiaoxue 发表于 2010-3-17 13:09

恩...我也有着个问题

jess 发表于 2010-3-17 18:23

本帖最后由 jess 于 2010-3-17 18:26 编辑

看眼帮助不就ok了

For bodies that are surrounded by air, the force and torque are calculated from the computed magnetic field in the layer of air. This method is equivalent to a Virtual Work method in which the body is moved slightly inside its envelope of air and the force or torque is obtained from the corresponding change of energy. This method of calculation is more accurate than the use of the Maxwell stress tensor.

For bodies that carry current, the Log Report displays the values for both the Maxwell Stress method and the Lorentz Force method – which method is reported on the Global Results window depends on whether that body is touching magnetic material (Maxwell) or is isolated (Lorentz).

MagNet calculates torque about the origin of the model. Torque about another 3D point (x, y, z) is given by the following formula:


Torque is displayed in the Force page of the Global Results window.

gegege 发表于 2010-3-26 12:50

magnet 计算力是用虚功原理计算。

hengbeishi 发表于 2010-3-26 20:37

我也要请教
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