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首页ABAQUS入门教程:有限元方法在航空航天结构分析中的应用
ABAQUS入门教程:有限元方法在航空航天结构分析中的应用
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更新于2024-07-17
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Abaqus是由Dassault Systemes Inc.开发的一款强大的有限元素分析软件,它在结构力学和计算方法领域占有重要地位,尤其是在航空航天结构的重量优化分析中。本课程旨在介绍如何通过Abaqus/CAE进行完整的有限元建模、分析工作流程以及结果评估。学习者将能够运用Abaqus/Standard和Abaqus/Explicit来解决包括材料非线性、大变形和接触在内的结构分析问题。 课程为期五天,覆盖广泛,适合模拟分析师参加。第一天的课程从Abaqus的概述开始,通过演示让学员初次接触Abaqus的界面和基本操作。接着,学员将学习如何在Abaqus中处理几何建模,包括使用原生几何、创建壳特征(如从实体特征或薄体)以及针对管道蠕变的模型构建工作坊。 第二天的课程聚焦于几何操作,包括导入和编辑非关联网格(或孤儿网格),以及处理管道几何间的相交问题,以及可选的钢筋面板模型。这些技能对于确保模型的准确性和适用性至关重要。 在第三天,学员将学习如何处理在Abaqus之外创建的模型,展示如何导入并编辑这些模型,以便无缝整合到Abaqus的分析环境中。这显示了Abaqus在处理跨平台数据的能力,以及与其他CAD系统集成的灵活性。 通过整个课程,学员不仅将掌握Abaqus的基本操作,还将学会如何有效地进行线性静力分析、结构动力学模拟,以及理解材料行为对结构响应的影响。熟练掌握这些技能后,学员将成为具备高级分析能力的Abaqus专业用户,能够应对各种工程挑战,提升产品设计的精确度和效率。
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L1.19
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (15/22)
Custom keyboard shortcuts
Available for most functions.
E.g., the key combination
<Shift> + <Ctrl> + <P> may be assigned
to Create Part dialog box
Default keyboard shortcuts for
common functions (save, print, etc.)
can also be reassigned.
Keyboard shortcuts must use one
of the following keys or key
combinations:
Any function key except F1
<Alt> + <Shift> + key
<Ctrl> + key. You can also add
<Alt> or <Shift> to modify any
keyboard shortcut that includes
the <Ctrl> key.
L1.20
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (16/22)
View manipulation
Toolbar to control view (pan, zoom, rotate, etc.).
Alternatively, can use a combination of keyboard and mouse actions:
Rotate: <Ctrl>+<Alt>+MB1.
Pan: <Ctrl>+<Alt>+MB2.
Zoom: <Ctrl>+<Alt>+MB3.
You can reconfigure these combinations to mimic the view manipulation interfaces used by other
common CAD applications
16
L1.21
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (17/22)
3D compass
View manipulation tool
Provides a quick and convenient way
to change model view
Appears by default in each viewport;
can be turned off if necessary
Uses three axes to indicate current model
orientation
Can be clicked, dragged and oriented;
by clicking different areas, specialized view
manipulations can be performed:
I. Rotate freely about the model's center of
rotation.
II. Rotate about a fixed axis.
III. Pan camera along a fixed axis.
IV. Pan camera within a fixed plane.
V. Apply a predefined view.
L1.22
www.3ds.com | © Dassault Systèmes
What is a model database file (extension .cae)?
Contains all the information for any number of models.
Typically contains one model or several related models.
Only one model database can be opened in Abaqus/CAE at a time.
Model 1 Model 2 Model 3
Model database (.cae)
Overview of Abaqus/CAE (18/22)
17
L1.23
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (19/22)
What is a model?
Contains all the necessary information for an analysis.
Contains any number of parts and their associated properties.
Is independent of other models in the model database.
Objects such as parts and materials can be copied between different models in the same
database.
Contains a single assembly of part instances, including the associated contact interactions, loads and
boundary conditions, mesh, and analysis history.
Model 1
parts
material properties
1 assembly
1 analysis history
L1.24
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (20/22)
Models can be imported into one database from
another
Model data from the imported database is
copied into the current database.
E.g., parts, sections, assemblies,
materials, loads, BCs, etc.
Analysis job definitions and custom data are
not copied
User A
User B
Master
Model
=
+
18
L1.25
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (21/22)
What is Python?
Command language used by Abaqus/CAE.
Uses range from command scripting to
creating customized applications.
Powerful and easy-to-use public domain,
object-oriented programming language.
There are several books available on Python
programming.
Additional learning materials are available
online at www.python.org.
It is not necessary to learn Python
programming to use Abaqus/CAE.
L1.26
www.3ds.com | © Dassault Systèmes
Overview of Abaqus/CAE (22/22)
Commands issued during an Abaqus/CAE session are saved in journaling files containing Python scripts.
Replay (.rpy) file All commands executed during a session,
including any mistakes, are saved in this
file.
Journal (.jnl) file All commands necessary to recreate the
most currently saved model database
(.cae) are saved in this file.
Recover (.rec) file All commands necessary to recreate the
model database (.cae) since it was most
recently saved are saved in this file.
Journaling files can be modified in any way appropriate for the Python language.
19
L1.27
www.3ds.com | © Dassault Systèmes
Starting Abaqus/CAE (1/2)
Three options available:
Command line
abaqus cae = filename.cae
Opens Abaqus/CAE in current directory
Start menu (Windows)
Opens Abaqus/CAE in startup
directory (set during installation)
Working directory can be changed
(see next slide)
Double-click the .cae or .odb file
in the Windows folder
Opens Abaqus/CAE in current directory
L1.28
www.3ds.com | © Dassault Systèmes
Starting Abaqus/CAE (2/2)
Selecting a work directory
Can select a work directory
Default is startup directory
Subsequent file operations will use this directory for reading/writing
Job files will be written to the new work directory
This makes it easier to manage job files
E.g., keep all job files in a per-job directory
20
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