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研究了局部场地条件对地震波的散射效应，对拱坝－地基体系在不均匀散射场和均匀输入场地震作用下的动力时程响应进行了对比分析．对小湾拱坝的实际分析表明，局部场地条件对地震波的散射效应对于拱坝的应力分布和峰值大小的影响是不容忽视的，甚至是至关重要的．
The scattering effects of local site conditions on seismic waves are studied. The dynamic time history response of the arch dam-foundation system under uneven scattering and uniform input fields is contrasted and analyzed. The actual analysis of Xiaowan arch dam shows that the influence of local site conditions on seismic wave scattering can not be neglected or even crucially affected by the stress distribution and peak size of arch dams.