【作者】 赵越； 李卫东； 万敏；

【Author】 Zhao Yue;Weidong Li;Wan Min;School of Mechanical Engineering & Automation Beihang University;

【机构】 北京航空航天大学；

【摘要】 针对某半导体激光器发射的多阶模高斯激光束,基于CCD相机实测多组不同大小激光光斑的光亮度分布,使用高斯分布函数形式拟合,并利用激光的发散特性,推导并验证了该激光器发射光束内的功率密度场解析模型。将该功率密度模型嵌入到有限元软件ABAQUS中进行金属板料激光扫描过程温度场仿真,并与实验测量结果进行了对比。结果表明,有限元计算的温度场误差在7%以内,证明了所建立的功率密度场解析模型准确度较高,为该激光器热扫描应用研究建立了基础。更多还原

【Abstract】 Based on the brightness value distribution of a range of multi-modal Gaussian laser beams measured by a CCD camera, an analytical model presenting the laser power density field has been established by using Gaussian distribution function considering the divergence characteristics of laser beams. A simulation of a sheet metal laser scanning process has been conducted by embedding the analytical model into FE software ABAQUS and compared with a corresponding experiment. The results reveal that the simulated temperature field agrees well with the measured one by an error within 7%, indicating the good accuracy of the analytical model and enhanced the foundation of the application of thermal laser scanning.更多还原