翼板厚度差异对T形接头焊接变形的影响研究

Research on T-joint Welding Deformation in Different Flange Thickness

T形接头焊接结构形式广泛应用于船舶建造和修造的各个工序中,针对翼板厚度差异引起的T形接头焊接温度场、横向收缩量、纵向收缩量以及角变形的研究规律问题,利用SYSWELD有限元分析软件,对其焊接过程进行数值模拟仿真,研究得到随着翼板厚度的增加,焊接过程中翼板上下表面的峰值温度差值逐渐增大,焊接完成后翼板的横向收缩量、纵向收缩量以及角变形逐渐减小,这与实际生产规律相符,为造船及修船过程中由于翼板厚度差异引起的T形接头焊接变形的预测,以及精度控制提供了前提条件.

T-joint welding structure is widely used in ship construction and repairing,while there is almost no studies on the effect of different flange thickness on temperature field,transverse shrinkage,longitudinal shrinkage and angular deformation.This paper applies the software SYSWELD to simulate the welding process of T-joint.With the increase of flange thickness,the peak temperature difference between the flange up and flange down is found to increase gradually in the process of welding,while the transverse shrinkage,longitudinal shrinkage and angular distortion are reduced gradually.This is consistent with the actual process and provides the premise for the forecast and control of Tjoint deformation resulting from the difference of flange thickness in the process of ship construction and repairing.