船体分段钢结构焊接过程仿真

通过有限元与神经网络相结合的方法，模拟了船体上层建筑、舷侧分段钢结构典型部位的焊接过程，并对其温度场、位移场进行了仿真，分析了组焊工序、焊接工艺参数对上述分段钢结构焊接变形的影响。研究结果表明，采用有限元与人工神经网络相结合方法，可以快速分析、预测船舶钢结构的焊接变形，且仿真结果与实焊数值能较好吻合。并分析出影响船体分段钢结构焊接变形的主要因素是钢板拼焊后产生的残余应力，增加消除焊接应力工序，可以明显降低船体分段钢结构焊后产生的变形量。

Simulation on Welding Process of Marine Block Steel Construction

Based on finite element analysis (FEA) and artificial neutral network (ANN), the simulation on the welding process for typical steel construction of superstructure and broadside is carried out. The temperature fields and displacement fields are modeled. The effect of the welding procedure, the welding technical parameters, etc. on the welding deformation is analysed. The research results show that the welding deformation of marine steel construction can be rapidly analyzed and predicted by combining finite element analysis with artificial neutral network, and the simulated results are close to the test results. The analyzed results also show that the main factors affecting the welding deformation on marine block steel construction are the residual stress and residual deformation, which are generated in the process of steel plate butt welding. The welding deformation can be obviously decreased by appending the procedure of removing the residual stress.