發(fā)布時(shí)間：2018-05-24 10:40

  本文選題：數(shù)值模擬 + 單元類(lèi)型　； 參考：《電焊機(jī)》2016年11期

【摘要】：焊接數(shù)值模擬分析過(guò)程中,在保證網(wǎng)格質(zhì)量的前提下,單元類(lèi)型及網(wǎng)格類(lèi)型的選擇對(duì)計(jì)算結(jié)果的精確性產(chǎn)生明顯影響。以大型有限元分析軟件Marc為計(jì)算工具,采用四面體網(wǎng)格和六面體網(wǎng)格對(duì)平板對(duì)接接頭進(jìn)行離散,同時(shí)分別采用一階單元和二階單元進(jìn)行分析。結(jié)果表明:四種單元類(lèi)型下的焊接仿真變形趨勢(shì)與實(shí)際焊接變形趨勢(shì)一致,但是計(jì)算結(jié)果有較大差異。當(dāng)焊接方法為MAG焊,網(wǎng)格尺寸為2 mm時(shí),采用六面體8節(jié)點(diǎn)單元能較好地模擬焊接結(jié)構(gòu)的變形情況。但是當(dāng)焊縫位置網(wǎng)格尺寸發(fā)生變化時(shí),如何選取單元類(lèi)型需要進(jìn)一步的分析。
[Abstract]:In the process of numerical simulation and analysis of welding, the selection of element type and mesh type has a significant effect on the accuracy of the calculation results under the premise of ensuring the quality of the mesh. Using the large finite element analysis software Marc as the calculation tool, tetrahedron mesh and hexahedron mesh are used to discretize the butt joint of the flat plate, and the first order element and the second order element are used for the analysis, respectively. The results show that the trend of simulated welding deformation is the same as that of actual welding, but the calculated results are quite different. When the welding method is MAG welding and the mesh size is 2 mm, the deformation of the welded structure can be well simulated by using the hexahedron 8 node element. However, when the mesh size changes, how to select the element type needs further analysis.
【作者單位】： 江蘇徐州工程機(jī)械研究院;徐州徐工隨車(chē)起重機(jī)有限公司;南京航空航天大學(xué);
【分類(lèi)號(hào)】：TG404
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本文編號(hào)：1928755