电渣焊接头温度场数值模拟

发布时间：2018-04-09 06:16

本文选题：电渣焊　切入点：等密度热源　出处：《焊接学报》2015年07期

【摘要】：为了研究建筑钢结构箱型柱中腹板与隔板处电渣焊接头的温度场,以有限元软件MSC.Marc为平台,开发了用于电渣焊温度场的计算方法.在所开发的计算方法中,采用了半椭球等密度热源模型来模拟电渣焊的热输入,以生死单元技术考虑焊缝成形,并采用实测得到的低合金高强度钢SM490A材料的高温热物理性能参数模拟了箱型柱中的腹板与隔板电渣焊接头的温度场.同时采用试验方法实测了电渣焊接头典型位置的热循环曲线,并观察了接头的焊缝宏观截面形状.结果表明,计算得到的热循环曲线与实测结果十分吻合,计算得到的焊缝形状与试验结果也基本一致,验证了所开发的数值计算方法的有效性.
[Abstract]:In order to study the temperature field of electroslag welding joint between web and partition plate in steel box column of building structure, a calculation method of electroslag welding temperature field was developed on the platform of finite element software MSC.Marc.In the developed calculation method, the semi-ellipsoid iso-density heat source model is used to simulate the heat input of electroslag welding, and the weld formation is considered by the birth and death element technique.The temperature field of the electroslag welded joints of the web and partition plate in the box column was simulated by the high temperature thermophysical properties of the SM490A material of low alloy high strength steel.At the same time, the thermal cycling curves of typical positions of electroslag welded joints were measured by means of test method, and the macroscopic cross section shapes of the joints were observed.The results show that the calculated thermal cycle curve is in good agreement with the measured results, and the calculated weld shape is basically consistent with the experimental results, which verifies the validity of the developed numerical calculation method.
【作者单位】：重庆大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(51275544)
【分类号】：TG407;TG448

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