管子对接多道焊接计算效率与精度分析

Analysis on calculation accuracy and efficiency of multi-pass butt weld of pipe

摘要: 研究了焊接分段移动热源和焊接区网格尺寸对管子对接焊接过程计算精度和效率的影响,得到一种相对合理的网格尺寸和热源的分段方法以满足大型管子焊接应力三维模拟计算精度和效率的要求.结果表明,焊接区和热影响区的网格尺寸≤3.3mm,并且采用分段移动热源的方法,可以满足计算精度的要求,并大大的提高了三维模拟计算的效率.

Abstract: The influence of segments heat source and mesh size on calculation accuracy and efficiency of 3-D EFA of multi-pass butt-welded pipe were investigated.The methods can meet the demand of calculation accuracy and high efficiency of 3D finite element simulation of large pipes.The results show that the mesh size below or equals to 3.3mm can meet the accuracy requirement,the segment heat source,which has little efficiencies on calculation accuracy,can improve the calculations efficiency greatly.