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COMSOL_Multiphysics-几何建模-0822

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1、CAD导入
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 目的

            – 将COMSOL Multiphysics与设计过程集成 

            – 不需要在COMSOL Multiphysics中重新绘制几何 

            – 使模拟大型和复杂的问题变得更容易 

• 基于Parasolid的CAD内核 

• 支持多种CAD文件格式 

• 与Solidworks,Pro|ENGINEER, Autodesk Inventor , SpaceClaim双向连接,便于进行结构参数化设计

• 可自定义导入误差 

• 可修复缺陷 

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  • 直接导入所有主流CAD

格式至COMSOL桌面:

        –ACIS® (.sat, .sab)

        –Parasolid® (.x_t, .x_b, .xmt_bin) 

        –STEP (.step) 

        –IGES (.igs) 

导入方式:

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导入界面:

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消除和修复操作: 

        • 简化几何描述 

        • 移除短边、小面、薄长条 

        • 修复缺口 

        • 移除自交叉、尖角、以及不连续

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端盖面:

将开放的空间封闭,从而 形成求解域

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• 端盖流道末端,随后剖分CAD导入部分的内部区域. 

• 通过选择边界描绘出所围面区域. 

• 容易从一个纯粹的力学问题转化到流体模型或流固耦合 (FSI) 模型.

2.绘制几何

COMSOL中的几何表现形式: 

• 组合几何体

– 优点 

            • 在材料非连续处,物理量自动连续 

            • 在材料界面处,自动得到高精度解 

            • 在材料界面处,自动确认网格单元和节点 

– 缺点 

            • 网格越细,内存开销越大 

            • 对大的CAD模型网格剖分比较困难 

            • 装配体 

– 优点 

            • 在材料界面处可有意定义物理量不连续,例如接触阻抗 

            • 对大的CAD模型网格剖分比较容易 

            • 网格越粗,计算越快(但精度越低) 

– 缺点 

            • 需要更多的手工操作 

            • 为了保证足够的高精度,需要注意边界上的网格密度


– 常用工具 

– 2D几何建模 

            • 常用工具 

            • 布尔运算 

            • 变换 

– 3D几何建模 

            • 工作平面 

            • 常用工具 

            • 布尔运算 

            • 变换 

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  • 常用工具

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  • 创建2D几何模型

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COMSOL Multiphysics>User’s Guide>Geometry Modeling and CAD Tools> Creating a 2D Geometry Model

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创建3D几何模型

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其他

• 工具条快捷方式 

• 螺线管 

• 参数化曲线 

• 扫掠 

• … 


免责声明:

本页面/内容部分素材来源于互联网公 开 信 息,旨在传递更多信息,不代表本平台立场。

版权归原作者或机构所有,如涉及侵权,请通过平台联系我们,我们将在核实后第一时间处理。

本平台对转载内容的真实性、准确性不作任何保证,用户需自行判断并承担使用风险。

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