中文摘要：

在不同占空比的重复频率脉冲激光辐照下，数值模拟了金属材料前、后表面的温升特性和烧蚀深度变化规律，考察了材料厚度和物性的影响。模拟结果表明，材料前表面温升曲线呈齿状；激光占空比越小或者材料越薄，材料后表面温度越高，烧蚀越深；与连续激光相比，重复频率脉冲激光更有利于金属材料的加热及烧蚀。

英文摘要：

Under the irradiation of repetitive pulsed lasers with different duty ratios, the temperature increase characteristic of front and back surfaces and the variation law of ablation depth are numerically simulated, and the influences of material thickness and variety are investigated. The simulation results show that the temperature increase curve for the front surface possesses a tooth-like shape. The smaller the laser duty ratio or the thinner the material is, the higher the back surface temperature is, and the deeper the ablation depth is. Compared with the continuous-wave laser, the repetitive pulsed laser is more beneficial to heating and ablation of metals.