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本文通过量纲分析指出,爆炸焊接飞扳运动是几何相似的。不过,由于起爆端端部稀疏波的作用,飞板运动存在着非稳定运动段,在该段内确定飞板极大动态弯折角的相似参数有两个:一个是R;一个是炸药厚度与爆轰波波阵面距起爆端距离之比he/VDt。在稳定运动段内,确定飞板极大动态弯折角的相似参数只有一个R。试验结果证明,最纲分析的结论是正确的;并确定了he/V_(Dt)=0.04是稳定运动和非稳定运动的分界,它是制定大厚度扳焊接方案的依据之一。
In this paper, dimensional analysis shows that the explosion welding is a geometrical similarity. However, due to the effect of the sparse wave at the end of the detonation end, there are two non-steady motion sections in the flying motion. Two parameters are used to determine the maximum dynamic bending angle of the flight in this section: one is R; Detonation wavefront from the detonation end of the distance ratio he / VDt. In the stable motion segment, there is only one R. The experimental results show that the conclusion of the most general analysis is correct. And he / V_ (Dt) = 0.04 is defined as the boundary between steady motion and unsteady motion. It is one of the bases for formulating the large-thickness pull-off welding scheme.