comsol®产品套件

将CAD文件导入comsol多物理®with the CAD Import Module

Import CAD Files and Prepare Them for Analysis

The CAD Import Module add-on to COMSOL Multiphysics®有两个基本功能来协助您的建模工作流程。首先,对于在CAD软件中创建的几何形状,CAD导入模块支持各种不同文件格式的导入,包括寄生虫®和ACI®格式,标准格式(例如步骤和IGES)以及各种CAD系统的本机文件格式。其次,为了确保进口几何形状可以进行分析,您可以修复,失败或将虚拟几何操作应用于几何形状,以在导入期间修复差异或简化几何形状。所有这些功能均可确保您的几何进口过程无痛。

如果您是不使用CAD软件的CAE工程师,则CAD导入模块将帮助您与CAD用户合作,以​​确保合作时的平稳过渡。如果您是CAE工程师,也使用CAD软件,Comsol提供了几种连接comsol Multiphysics的附加产品乐动体育app无法登录®使用专门的Livelink™技术,每个主要的CAD软件包。您可以在接口部分

Importing CAD Files

All CAD software supports the export of Parasolid®,acis®, STEP, and IGES file formats, which can then be readily imported into COMSOL Multiphysics®。In addition, the CAD Import Module allows you to import the native file formats of a number of CAD systems, such as SOLIDWORKS®,发明家®,PTC®Creo®Parametric™,NX™和AutoCAD®。The separate File Importfor®v5provides support for importing the native file format for this system. When you have installed the CAD Import Module, all CAD files are automatically converted to a Parasolid®geometry using the Parasolid®模块包含的几何引擎。这些几何形状随后可以通过comsol多物理中的工具更改®和CAD导入模块,包括对几何形状的有意识变化。一个例子是围绕CAD设计创建模型域,例如用于使用的外壳,例如CFD,声学或电磁分析。大多数CAD模型是要制造的物体的几何形状,模拟可用于建模该物体周围的现象,例如空气流。完成这些更改后,CAD导入模块可以将它们导出在IGES,步骤,寄生虫中®or ACIS®文件格式以导入其他工具。

Supported Formats for File Import/Export

请注意,并非所有文件格式都在所有操作系统上支持;有关详细信息,请参阅system requirements

File Format Extension 版本 Import Export
ACIS® .sat,.sab,.asat,.asab 直到2021 1.0(导入),
R4,R7,2016 1.0(出口)
Yes Yes
AutoCAD® 。dwg 2.5-2021 Yes
AutoCAD®DXF™ 。dxf 2.5-2021 Yes
iges .igs,.iges 最多5.3 Yes Yes
发明者®集会 。iam 11,2008-2021 Yes
发明者®部分 。ipt 6-11,2008-2021 Yes
NX™ .prt up to 1926 Yes
Parasolid® 。x_t, .xmt_txt, .x_b, .xmt_bin 最多v33.0 Yes Yes
PTC®Creo®参数™ .prt, .asm 1.0-7.0 Yes
PTC®Pro/ENGINEER® .prt, .asm 16 to Wildfire®5.0 Yes
扎实的作品® .sldprt,.sldasm 98-2021 Yes
STEP 。step AP203, AP214 (import),
AP203(出口)
Yes Yes
View all COMSOL supported file formats
A screenshot showing a CAD model imported into COMSOL Multiphysics® 将CAD文件导入comsol多物理时®使用CAD导入模块,可以使用特定的设置来确保导入过程平稳。

处理几何形状进行分析

在运行有限元分析时,清理几何形状进行分析与导入几何本身一样重要。CAD导入模块包含修复几何形状的必要工具,该工具在转移时继承了错误,打败了过度详细的几何形状,并删除了导致不必要的细分网格的几何实体。

维修进口的几何形状

The goal of building the CAD model is to obtain a digital representation of the real product. This digital version contains the 3D geometry of the product together with the information needed for manufacturing it. While a 3D CAD geometry is usually true to the real object it represents, small and hardly noticeable anomalies can occur throughout the geometry. This may be due to numerical limitations in the computer's ability to represent complex shapes, limitations of some older CAD file format, human errors, or translation of the data between file formats. These small anomalies may result in, for example, faces that do not meet exactly at the edges or inconsistent face normals and edge directions. In turn, this may lead to problems with forming valid, watertight geometric objects when generating a mesh within COMSOL Multiphysics®。Therefore, geometry repair is always performed by default during the import process to get you started with your simulations.

除了在导入时发生的自动维修外,CAD导入模块还提供了可让您在导入后手动维修CAD型号的功能。例如,您可以手动选择面部并将它们编织在一起,以使用指定的公差来形成固体,以缩小间隙。另外,您可以自动找到间隙的边缘,并使用这些边缘作为输入来生成覆盖间隙并形成实心的新面孔。

Defeature a Geometry for Analysis

一旦正确修复了CAD模型,由于几何形状的复杂性和模型中的小几何特征的数量,可能仍然很难在模拟中使用。如果未从几何形状中删除,这些特征可能会导致过度膨胀的网格元素,因此需要比必要的更多计算资源。

While some features, such as fillets, grooves, threads, and holes, are required for an eventual manufacture, they may not always be relevant to an overall simulation of the CAD model. The CAD Import Module has the tools to remove them and simplify the geometry. You can delete fillets and chamfers; fill holes; and delete groups of faces, replacing them with a uniform surface through filling or patching.

例如,其他不需要的功能可能是由CAD建模和导入过程本身所产生的,例如,小面,滑动面,尖峰和短边。对于这些无意的功能,您可以在接口中选择它们的类型,并指定公差值以识别和删除此几何特征的所有出现。也可以使用指定用于维修的相同公差,自动执行失败。

图像显示了修复CAD几何形状中的SLIVER的示例以改善网格 Repairing a sliver improves the mesh by avoiding elongated mesh elements that can result from these high-aspect-ratio faces.
Side-by-side images showing a CAD geometry with and without a groove and hole. 通过删除与整体模拟无关的特征,例如在此示例中的凹槽和孔中,可以简化从CAD工具中的几何形状。
并排图像显示带有和没有圆角的CAD几何形状。 Defeaturing can include removing the fillets from a geometry. Here, the fillets are chosen and removed in one action.
Side-by-side images showing CAD geometries with and without capped faces. 封盖面可让您填充域并在该域上执行模拟,例如流体流过排气歧管。

执行虚拟几何操作以简化网格

Performing virtual geometry operations is similar to the defeaturing process, except that the imported geometry remains unchanged. Instead of changing the geometry, the virtual geometry operations instruct the mesher to ignore certain features that either do not influence the simulation greatly or are not particularly relevant to the desired simulation. The meshing subsequently takes place on a virtual geometry. Such operations involve ignoring vertices, edges, and faces; forming composite edges and faces; collapsing edges and faces; and more.

有两种采用虚拟几何操作的方法。可以手动选择要忽略的面部,边缘和顶点,但也有一个自动Remove Detailsoperation to automatically recognize and remove small features by using a sequence of virtual operations (which can then be edited as necessary).

这些操作包括在基本软件包中,comsol多物理学®, and are a great complement to the defeaturing tools of the CAD Import Module. This functionality is particularly useful when the features of the geometry cannot be easily removed through defeaturing or repair, or when the simulation requires you to keep the curvature of the geometry intact.

直接与CAD软件接口

CAD导入模块提供了工具,以确保从CAD软件到comsol多物理的几何形状平稳过渡®分析,这对于无法访问CAD计划的CAE工程师非常适合。如果您是正在寻找CAE工具的CAD用户,则Comsol的Livelink™产品提供了其他功能,可以直接将CAD系统与Comsol Mu乐动体育app无法登录ltiphysics连接起来®。当Livelink™产品中的同步功能自动在另一个程序中自动更新几何形状,而另一个程序进行了乐动体育app无法登录更改。使用Livelink™产品,当您想进行乐动体育app无法登录更改以进行进一步分析时,您可以避免整个CAD几何形状的进口/导出和重新接收。此外,可以根据几何实体(例如边缘的长度)自动运行参数扫描,甚至可以运行分析以根据结果参数优化CAD几何形状。

The list of current products that contain this functionality are as follows:

本文列出的所有商标均为其各自所有者的财产,Comsol AB及其子公司和产品不隶属于,由这些商标所有者的认可,赞助或支持。乐动体育app无法登录有关此类商标所有者的列表,请参见//www.dvdachetez.com/tm



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