Compressive faults occurred after principal earthquake with slow variation in propagation and release of stress wave, this might lead to higher after shock intensity and longer duration.
挤压型逆冲断层地震在主震之后，应力传播和释放过程比较缓慢，可能导致余震强度较大，持续时间较长。
The results show that, open-cellular al foams have a good shock weakening property, where the shock compressive stress weakens exponentially and the wave velocity weakens linearly with the distance.
结果表明：开孔泡沫铝具有良好的冲击衰减性能，使冲击波压力在其中呈指数关系衰减，而波速则随距离呈线性关系衰减。
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