焊接工件的温度场决定了焊接应力场和应变场，是影响焊接质量和生产率的主要因素。
The temperature field of welding workpiece determines the stress field and strain field, and it is also the main factor affecting the weld quality and production rate.
本文基于大型有限元软件ABAQUS，开发了一个顺次耦合的焊接应力计算程序，对P 91钢焊接接头的残余应力场进行了模拟。
A coupling calculation method for welding stress was developed by ABAQUS code. The residual stress for welded joint of P91 steel was simulated by the method above.
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