目前,苏联正在设计建造一系列巨型水工建筑物,例如萨扬·舒申斯克坝、努列克坝、罗贡坝和其它一些水电站的大坝。这些水工建筑物一般位于高地震活动的山区。因此,在设计工作中,大坝抗震性的估计,对正确地反映建筑物的运行特点,具有重要意义。尤其重要的是.大坝是有复杂几何形状的块体结构,抗震估算应该考虑坝体振动的三维特征。但是,即使在弹性状态下,大坝的三维动力计算也有很大的困难。因此,在三维振动计算中,一般采用相 Currently, the Soviet Union is designing and constructing a series of giant hydraulic structures such as the dam of Sayan Shushensköp, Nureck, Loogung and some other hydropower stations. These hydraulic structures are generally located in high seismic activity in the mountains. Therefore, in the design work, the estimation of dam seismicity is of great significance to correctly reflect the characteristics of the operation of the building. It is especially important that the dam is a block structure with complex geometries. The seismic estimation should take into account the three-dimensional characteristics of the dam’s vibration. However, even in the elastic state, there are great difficulties in the three-dimensional dynamic calculation of the dam. Therefore, in the three-dimensional vibration calculation, the general use of phase