在惯性约束核聚变(ICF)驱动器中，大口径反射镜是关键的光学器件，其稳定性直接影响着光束的指向和定位精度。随机振动和镜架结构参数是影响大口径反射镜架动态响应的主要因素。为明确随机振动激励大小及镜架特征参数对镜架动态响应的影响，实现对镜架动态响应的控制，采用有限元分析软件对大口径反射镜架在随机振动作用下的响应进行了分析，分析了激励功率谱密度、结构刚性和阻尼比等不同参数对大口径反射镜架动态响应的影响。分析结果表明：减小激励功率谱密度和增大结构刚性对减小大口径反射镜结构响应具有相同的作用,增大结构阻尼比效果最明显，但无论是减小激励功率谱密度、增大结构刚性以及增大结构阻尼比，其作用效果都在递减。

In the inertial-confinement fusion (ICF) driver, the large-aperture array mirror mount is an important opto-mechanical system, which affects the beam direction and position precision. Random vibration and the parameters of the large aperture array mirror mount are the main factors that influence the dynamic response of the mirror. The finite element analysis software is used to analyze the relation between the parameters of the excited power spectral density (PSD), the structure elastic modulus, the damp ratio and the structure dynamic response. The results indicate that reducing the excited PSD and increasing the elastic modulus has the same effect on reducing large-aperture mirror mount structure dynamic response, and increasing the damp ratio is the best way. However, the effect of all the methods as reducing excited PSD, increasing elastic modulus and damp retio is becoming weaker.