分析了激光功率、焊接速度和焦点位置对焊接过程的影响以及保护气体对焊接过程不稳定性的影响。
The influence of laser power, welding speed and the focus position to the laser welding process as well as the assist gas to the instability of the welding process are analyzed.
在电流片两侧的基态速度场与磁场相互平行的位形下，讨论了速度切变对撕裂模不稳定性的影响。
The influence of shear flow along the magnetic field accompanied with a plane current layer on the tearing instability is analyzed.
流线模型不存在数值弥散和不稳定性，比传统的数值模拟速度快，允许节点多。
The streamline model overcomes the numerical dispersion and instability, is faster than the conventional numerical simulation and allows for more nodes.
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