基于FLUENT的船用鋁合金板激光焊接數(shù)值仿真分析

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中圖分類號(hào)：TG456.7;TP391.99 文獻(xiàn)標(biāo)志碼：B

Numerical simulation analysis of laser welding of marine aluminum alloy plate based on FLUENT

LYU Cheng

（Design Institute of Hudong-Zhonghua Shipbuilding（Group）Co.，Ltd.，Shanghai 2O0129，China）

Abstract：To obtain the optimal laser welding process parameters， taking the marine aluminum alloy plates as the study object，the welding temperature field and flow field models are built in FLUENT software for simulation analysis. The actual force and boundary conditions are loaded at the model，and the molten pool morphology and the temperature and velocity distribution cloud at diferent welding speeds are obtained. The results indicate that under certain welding conditions，the welding speed has a significant impact on the morphology and temperature field of the molten pool： while the welding speed is fast，the metal fluid flow is uneven，the temperature field distribution is disordered，and the morphology of the molten pool is complex and unstable；while the welding speed is slow，there is a large gradient temperature distribution in the molten pool，and the metal fluid flow is weak；choosing the appropriate welding speed is essential to achieve better products.

Key words： laser welding；molten pool； welding speed； temperature field； flow field； aluminum alloy

0 引言

激光焊接是一種以高能量的激光光束照射焊接件的待焊位置，使該位置金屬熔化進(jìn)而使兩金屬結(jié)合在一起的焊接方法。（剩余4439字）