Q690高强钢管焊接残余应力数值模拟

发布时间：2018-06-04 06:33

本文选题：Q高强钢管 + 焊接残余应力　；参考：《工程力学》2014年10期

【摘要】：该文重点研究Q690焊接高强钢管截面纵向残余应力分布模式,利用商业有限元分析软件ANSYS对其进行数值模拟,运用其中的"生死单元"和热-结构耦合分析功能来模拟焊接过程,以管径与壁厚为变量,设计3组共12个有限元模型。通过对模型的数值分析,得到每个模型的截面纵向残余应力分布形式,经过对比分析得出其规律,并提出Q690焊接高强钢管截面纵向残余应力的简化分布模式。结果表明,其分布模式与Wagner提出的分布模式接近,但Q690高强钢管的纵向残余压应力峰值与其屈服强度的比值仅为0.2,要明显小于普通钢管纵向残余压应力峰值与其屈服强度的比值0.35。
[Abstract]:In this paper, the longitudinal residual stress distribution mode of Q690 welded high strength steel tube is studied. The numerical simulation is carried out by using commercial finite element analysis software ANSYS, and the welding process is simulated by the function of "birth and death element" and thermal-structural coupling analysis. Taking tube diameter and wall thickness as variables, three groups of 12 finite element models were designed. Based on the numerical analysis of the model, the longitudinal residual stress distribution of each model is obtained, and the distribution pattern of longitudinal residual stress of Q690 welded high-strength steel pipe is proposed. The results show that the distribution model is close to that proposed by Wagner. However, the ratio of longitudinal residual compressive stress to yield strength of Q690 high strength steel pipe is only 0.2, which is obviously smaller than that of ordinary steel pipe.
【作者单位】：西安建筑科技大学土木工程学院;中国建筑西北设计研究院有限公司;河南省电力勘测设计院;
【分类号】：TU392.3;TU311

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