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用有限元方法数值分析了激光线源作用于铝管时产生的温度场梯度,给出了不同时刻切向和法向温度梯度等值线分布。数值结果表明:材料内部温度分布极不均匀,产生很大的温度梯度;切向温度梯度沿径向在样品的表面区域达到最大,沿周向在激光强度的空间分布变化最明显的位置值最大;法向温度梯度的最大值点沿径向随时间推移逐渐向材料内部移,沿周向在激光线源中心处最大。
The temperature field gradient generated when the laser source acts on the aluminum tube is numerically analyzed by the finite element method. The contour of the temperature gradient at different tangential and normal directions is given. The numerical results show that the temperature distribution inside the material is very uneven and a large temperature gradient is produced. The tangential temperature gradient reaches the maximum along the radial direction in the sample surface, and the position with the most obvious spatial variation in the laser intensity along the circumferential direction is the largest ; The maximum point of the normal temperature gradient gradually moves toward the inside of the material along the radial direction along the radial direction and reaches the maximum along the circumferential direction at the center of the laser line source.