这样回避了速度梯度间断的困难，缓和了出口处应力奇性引起的矛盾，同时又减少了计算量。

Thus the difficulties of discontinuous velocity gradient and the stress singularity at the exit point are avoided, and the expense of computation is reduced.

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结果表明，采用间断焊可以有效降低焊接时的局部高温，而且其残余应力也略低于连续焊。

It can be concluded that the local high temperature can be reduced effectively using the technique of discontinuous welding and smaller residual stresses are obtained.

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基于裂纹表面位移间断的计算结果得到了裂纹前沿的应力强度因子。

So the stress intensity factors can be obtained by the displacement discontinuities.

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