【摘要】：焊接變形會(huì)對焊接件的應(yīng)用造成很大影響,進(jìn)行結(jié)構(gòu)件焊接變形的高精度和高效率預(yù)測具有重要的工程意義。該文針對大型薄壁圓筒件,應(yīng)用局部-整體映射法對其環(huán)焊縫的焊接過程進(jìn)行了有限元分析,得到了3種不同焊接順序下的筒體變形結(jié)果。計(jì)算結(jié)果表明:相比于環(huán)縫一段焊和環(huán)縫兩段焊,對環(huán)縫分成四段焊接情況下圓筒變形量最小,其數(shù)值相比于環(huán)縫一段焊減少約17%。將局部-整體法計(jì)算結(jié)果與熱彈塑性法和實(shí)驗(yàn)方法所得結(jié)果進(jìn)行了對比,三者吻合較好,但局部-整體法的計(jì)算用時(shí)僅為熱彈塑性法的約1/6。
[Abstract]:Welding deformation will have a great impact on the application of welded parts. It is of great engineering significance to predict the welding deformation of structural parts with high accuracy and high efficiency. In this paper, the finite element analysis of the welding process of the circumferential weld of large thin-wall cylinder is carried out by using the local-global mapping method, and the deformation results of the cylinder under three different welding sequences are obtained. The calculation results show that compared with the first stage welding and the two stage welding, the deformation of the cylinder is the smallest when the annular seam is divided into four stages, and the value of the cylinder is about 17% lower than that of the first stage welding of the ring seam. The calculated results of the local-integral method are in good agreement with those of the thermoelastic-plastic method and the experimental method, but the calculation time of the local-integral method is only about 1 鈮，

本文編號：2488236