What’s in a name? When it’s Nastran, quite a lot. As many readers of this article may know, NASA originally developed the program in the late 1960s. It enabled the accurate and efficient design and analysis of space structures, and takes its name from the acronym for NASA STRuctural ANalysis. Today, it provides the foundation for many advanced finite element software packages.) F f: E7 z) T% Q) S: a$ l
When I first heard that Autodesk purchased NEi Software, and its flavor of the Nastran solver, I didn’t pay much attention since my main simulation platform is SOLIDWORKS. Soon thereafter, I heard that they were developing an integrated solution within SOLIDWORKS. I became interested but cautious in considering how well this integration would be executed and unsure about the timetable. Well, the timetable was sooner than I expected and in this article I will take a look at the resulting product known as Autodesk Nastran In‐CAD for SOLIDWORKS.
2 a9 S+ J: V6 \autodesk nastran for solidworks，用于有限元分析的第三方插件，下面以一个实例来演示插件使用。
& Z0 }( e& ?& @# f2 w, z" o软件安装后，在soldiworks插件管理器启动该插件
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3 t) p @5 Z' ?1 ]; [启动插件后，会在solidworks选项卡列中新增一个选项卡
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7 r/ I( ]9 ^( o, ^1 w选择这个选项卡，会发现autodesk nastran分析界面，与solidworks simulation分析界面相似。# B" |. O- k9 K
' {0 }! I% q0 G1 w! D开始分析，新建分析类型，选择静应力分析4 K1 w6 ` I/ k2 y! ~% u2 O
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/ t$ R- x7 @3 M. o定义载荷与约束条件8 [5 t7 P, C* B# C0 [# X+ B
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+ S) E# i& u! U+ s7 o2 A9 m划分网格时，弹出警告，原来没有赋予模型以物理属性
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确定物理属性
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确定载荷条件; c) {' D; Q! s) a! Q0 e; {; ~
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确定约束条件9 L4 k! m% J, H( C$ {% h+ j1 P) _% @ g
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对比下solidworks simulation夹具对话框/ c2 e. D7 X! v) x) A' g& z
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8 t8 u4 R0 `( k% {开始分析，autodesk nastran会显示求解过程
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分析完毕后还会有有限元模型的原始文本文件，这对于大多数用户而言没什么用处，但对于分析师进行高级调试是必要的。
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- `/ @- O, @7 z后处理结果选项
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Autodesk Nastran in-CAD offers a very powerful FEA tool to users who want the benefit of ease of geometry creation with Autodesk Nastran’s ability to abstract loads and boundary conditions beyond what is represented by the solid model geometry. Some flaws I discovered, such as geometry/FEA associativity, may already be addressed in the next version, which is now available.
4 u% C' b8 w$ {9 j/ q: sThe compromise with many CAD-embedded FEA tools is that the analysis tool is limited in its physics capabilities and gives the user limited access to the fundamental architecture of FEA: nodes, elements and boundary conditions. When needed, the Autodesk Nastran In-CAD product offers a transparent view of these details. Many users will find that this better aids the understanding of an FEA model from geometry creation to solver. Any discussion of FEA model accuracy has to start with how well the model is understood by the engineer, and this product represents a unique offering in this area.2 x2 x; m" [/ d% o
Autodesk Nastran In‐CAD for SOLIDWORKS is an interesting product that brings integrated CAD/FEA tools to a new level. The combination of a proven multi-physics engine like Autodesk Nastran, coupled with the geometry-modeling engine of SOLIDWORKS, has the potential to set the tone for advanced CAD-embedded finite element analysis.
# v8 Z) ^& E, P* y7 w; ^autodesk nastran是个强大的工具，与solidworks集成的插件是个有趣的产品，这样有限元模型与实体模型几何关联，几何形状的变化会及时反馈。原先只有solidworks simulation才会在几何形状变化时重新定义载荷与边界条件，现在autodesk nastran这个第三方插件也同样如此。
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发表于 2015-5-20 22:11:23
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