波形钢腹板梁T形接头焊接仿真分析与试验研究

Simulation analysis and experimental research on T-joint welding of corrugated steel web girders

为了解决波形钢腹板梁焊接温度场和残余应力分布尚不明确的问题,本文基于Simufact Welding软件建立三维有限元模型,对其T形接头的焊接温度场和残余应力进行了预测,并对模拟结果进行了试验验证。波形钢腹板梁的焊接温度场分布与熔池中心距离有关,距离熔池中心越近,温度梯度越大;焊接残余应力以纵向残余拉应力为主,而横向残余应力的应力水平相对较低,拉压应力共存;焊接速度和底板厚度的改变只会影响残余应力的峰值大小,不会影响残余应力的分布规律。结果表明:数值模拟结果和试验实测值吻合良好,数值模拟可靠。

To study the distribution of the welding temperature field and residual stress of corrugated steel web gird-ers,a 3D finite element model is constructed using Simufact Welding software.The welding temperature field and residual stress of the model's T-shaped joint are predicted,and the simulation results are verified by experiments.The distribution of the welding temperature field of the corrugated steel web beam is related to the center distance of the molten pool,and the closer the center of the molten pool,the greater the temperature gradient.The longitudinal residual tensile stress primarily dominates the welding residual stress.The horizontal residual stress is relatively low,showing a blend of tensile and compressive stresses.Changes in welding speed and base plate thickness do not affect the distribution pattern of residual stress but only the peak value of stress.The numerical simulation results align well with the experimental data,proving the reliability of the numerical simulation.