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北京石油化工学院2026年研究生招生接收调剂公告
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墙外人

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[求助] comsol计算力磁耦合问题 已有5人参与

碰到了一个问题,简单来说,怎么计算金属(比如铁)在磁场中受到磁力后的变形和应力?
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sxycyzhj

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2楼: Originally posted by liuqimin at 2016-03-26 10:52:25
In this simulation, we need three modules, magnetic field (AC/DC), solid mechanics , and ALE.
the first module is able to obtain the spatial field distribution.
the second module is used to achieve ...

Hello, please ask you a question, that is, I use Maxwell stress to calculate the magnetic force of the permanent magnet in the magnetic field, but the grid has a great influence on the calculation results. I continue to encrypt the permanent magnet grid, the calculation results have changed, the grid is not convergent, what's the matter with it, how can this be solved, thank you
16楼2018-04-19 16:45:56
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liuqimin

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【答案】应助回帖

感谢参与,应助指数 +1
In this simulation, we need three modules, magnetic field (AC/DC), solid mechanics , and ALE.
the first module is able to obtain the spatial field distribution.
the second module is used to achieve the deformation by the imposed magnetic field. it is noted that the maxwell stress should be applied as a boundary condition.
the third module is employed to adapt the mesh to make sure the quality of the calculation. you have to determine which part is free, which part is fixed and define some prescribe displacement?
哈哈哈
2楼2016-03-26 10:52:25
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墙外人

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引用回帖:
2楼: Originally posted by liuqimin at 2016-03-26 10:52:25
In this simulation, we need three modules, magnetic field (AC/DC), solid mechanics , and ALE.
the first module is able to obtain the spatial field distribution.
the second module is used to achieve ...

谢谢。之前我用ACDC模块计算过磁场和磁场力,但怎么将磁场力作为输入参数在结构力学模块里面计算时碰到了困难。
此外你提到的自适应网格应该不算是一个模块吧,我们理解不同?
谢谢你的回答。
3楼2016-03-28 10:58:57
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liuqimin

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引用回帖:
3楼: Originally posted by 墙外人 at 2016-03-28 10:58:57
谢谢。之前我用ACDC模块计算过磁场和磁场力,但怎么将磁场力作为输入参数在结构力学模块里面计算时碰到了困难。
此外你提到的自适应网格应该不算是一个模块吧,我们理解不同?
谢谢你的回答。...

actually, it is a fixed option in COMSOL for imposition of maxwell stress as a boundary condition

ALE is a module
哈哈哈
4楼2016-03-28 13:24:45
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