地震分析中的局部人工边界由于具有易于实现、稳定性较好的特点，目前在时域有限元法中得到广泛应用。

Local artificial boundary of seismic analysis is widely used in time-domain finite element method for its good feasibility and high numerical stability.

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研究结果表明，从模拟连续模型的精度上看，时域离散化使集中质最有限元法优于一致质量法，前者可取较大时间步长。

This paper shows that the time discretization makes the lumped-mass method much better than the consistent-mass one as accuracy is concerned for simulating wave motion in the continuous model.

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