随机法模拟地震动目前主要采用点源模型和有限断层模型两种方法。
At present, two main stochastic models, point-source model and finite-fault model, are adopted to simulate ground motions.
因此，研究实际地震动时程强度包络函数的特性，对合理模拟地震动时程具有重要的意义。
So studying of the envelope function of the practical ground motion acceleration records is very important.
在振动台上进行拱坝动力模型试验时，设置人工阻尼边界，以模拟地震时地震动能量向无限远域地基逸散的地基幅射阻尼效应。
Artificial damping boundary is adopted in seismic model test of arch dam on shaking table to simulate the radiation damping effect due to energy dissipation in infinitive foundation.
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