However, during the welding, the distance between the welding torch muzzle and the surface of the work piece has to change because of the confine of welded structure, which will cause instabilities of the welding arc and the welding process.
但是,由于焊接结构的限制,在焊接过程中焊枪喷嘴和工件表面的距离必然会发生变化,从而引起弧长及焊接过程的不稳定。
参考来源 - 基于DSP的MIG焊弧长模糊控制的研究As a welded structure, submarine inevitably has inner defects which can be regard as the seeds of a crack.
潜艇作为焊接结构,内部必然存在缺陷,这些缺陷随着载荷的周期作用会进一步扩展为裂纹。
参考来源 - 裂纹尖端塑性区及潜艇模型疲劳性能数值模拟研究First of all, some basic conceptions about fatigue failure of steel bridge are introduced, and some basic theories about fatigue strength are also introduced in this thesis. The main factors causing welded structure fatigue are analyzed.
本文首先简要介绍了钢桥疲劳的基本概念,阐述了疲劳强度基本理论,分析了影响焊接钢结构疲劳强度的主要因素,比较了各种构造细节的疲劳强度。
参考来源 - 钢桥整体节点疲劳性能研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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