提出了一种计算玻璃纤维/环氧树脂复合材料激光烧蚀过程中能量耦合率的模型，并通过对激光辐照玻璃纤维/环氧树脂复合材料的数值模拟计算了烧蚀过程中的激光透射率及表面温度，与实验结果吻合较好。结果表明，利用该模型可以计算玻璃纤维/环氧树脂复合材料激光烧蚀过程中的能量耦合率。利用该模型进一步计算了不同激光强度下耦合系数的变化规律，计算结果表明，对玻璃纤维/环氧树脂复合材料的激光烧蚀，激光的吸收方式存在体吸收向面吸收转变的过程；激光强度越大，能量耦合率增大到稳定值所需时间越短，体吸收向面吸收转变的过程越快。

A model is given out for computing energy coupling coefficient in the process of laser ablating glass fiber/expoxy composites. By the simulation of laser irradiating glass fiber/expoxy composites, laser transmission and the front surface temperature are abtained in the ablation process, which agree well with the experimental results. The result indicates that energy coupling coefficient in the process of laser irradiating glass fiber/expoxy composites can be computed by the proposed model. Besides, the change law of energy coupling coefficient with different laser intensities is computed with the proposed model. The computed result indicates that laser energy absorption mechanism changes from bulk absorption to surface absorption. More intensive laser beam causes that energy coupling coefficient increases more quickly and the conversion process from bulk absorption to surface absorption is faster.