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./ C* X, ]- g; |4 h, R ~( E
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.$ k, J9 F1 v* R! L! q k
autodesk nastran for solidworks，用于有限元分析的第三方插件，下面以一個實例來演示插件使用。2 z( e V0 _) [0 L8 o- Z* |
軟件安裝后，在soldiworks插件管理器啟動該插件
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$ N0 C" G3 J/ o5 r. b+ |, { f' F6 L啟動插件后，會在solidworks選項卡列中新增一個選項卡
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選擇這個選項卡，會發現autodesk nastran分析界面，與solidworks simulation分析界面相似。
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& `# e+ u" v9 \7 o, Z |開始分析，新建分析類型，選擇靜應力分析! r" h- a6 {$ h" E! V; r( ]
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+ t L ?' k1 J5 ^- Q& X定義載荷與約束條件; J9 J+ E& ~: W/ t& f3 C3 L$ C
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4 O1 X6 E/ l7 f劃分網格時，彈出警告，原來沒有賦予模型以物理屬性
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* q9 U# P1 _( f$ E* e1 n確定物理屬性8 Y& o5 L4 ^, M% w4 S
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0 ^ `7 F# u5 `# p; ?' o! I+ @確定載荷條件! v2 Z, o" D! @" k2 z
! ^' Q9 }7 }" e+ l- w確定約束條件
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$ u: T q9 s5 ?) a9 |, y對比下solidworks simulation夾具對話框* F8 |* C" o' l) c$ @- E) |9 _
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* V$ \* Q; {1 @8 ?6 y; y開始分析，autodesk nastran會顯示求解過程: I' O, O X% I: j0 C n' J+ @0 K. U1 R
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分析完畢后還會有有限元模型的原始文本文件，這對于大多數用戶而言沒什么用處，但對于分析師進行高級調試是必要的。
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9 Z, U% a4 o" |+ ~. |4 h后處理結果選項
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: [! a: }* h& L UAutodesk 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.
) { D" ?: {8 c( ~ ^The 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.
8 [6 _! P e# v" T1 RAutodesk 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.
1 s4 g$ z/ h5 Mautodesk nastran是個強大的工具，與solidworks集成的插件是個有趣的產品，這樣有限元模型與實體模型幾何關聯，幾何形狀的變化會及時反饋。原先只有solidworks simulation才會在幾何形狀變化時重新定義載荷與邊界條件，現在autodesk nastran這個第三方插件也同樣如此。/ ~& }1 C' ~; V7 l* \7 _' Q
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發表于 2015-5-20 22:11:23
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