本文基于空间非均匀地震动输入和拱坝三维动力有限元法，建立了拱坝在非平稳空间随机地震动场激励下的随机振动分析方法．以一实际拱坝为例，计算了非平稳随机地震动场作用下的拱坝随机地震反应，并与平稳随机地震动场的结果进行了比较． In this paper, based on the spatial non-uniform ground motion input and the three-dimensional dynamic finite element method of arch dam, a stochastic vibration analysis method of arch dam under random ground motions in non-stationary space is established. Taking an actual arch dam as an example, the random seismic response of arch dam under non-stationary random earthquake field is calculated and compared with the results of a stationary random earthquake field.