| 李亮,杜修力,翟威.横观各向同性饱和两相介质弹塑性波动问题研究[J].水利学报,2013,44(3): |
| 横观各向同性饱和两相介质弹塑性波动问题研究 |
| Wave propagation in transversely isotropic elasto-plastic fluid-saturated porous media |
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| DOI： |
| 中文关键词: 横观各向同性 饱和两相介质 波动 弹塑性 时域显式有限元法 SMP破坏准则 |
| 英文关键词: words：transversely isotropic fluid-saturated porous media wave propagation elasto-plastic time-domain explicit finite element method SMP failure criterion |
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| 中文摘要: |
| 针对横观各向同性饱和两相介质的弹塑性波动问题，建立了基于SMP 破坏准则的横观各向同性饱和两相介质弹塑性动力本构模型，并建立了横观各向同性饱和两相介质弹塑性波动问题求解的时域显式有限元方法。基于上述本构模型与时域显式有限元方法进行了横观各向同性饱和两相介质弹塑性波动问题的研究。研究结果表明：横观各向同性饱和两相介质的弹塑性动力反应与其弹性动力反应有较为显著的差异，表现在前者的反应峰值相对于后者有较为明显的增大，同时二者反应时程的波形也有较大的差异。数值计算工作同时表明，时域显式有限元方法是进行横观各向同性 |
| 英文摘要: |
| In this paper，an elasto-plastic dynamic constitutive model for transversely isotropic fluid-saturated porous media is constructed based on the SMP failure criterion，and the time-domain explicit finite element method for the wave propagation in transversely isotropic elasto-plastic fluid-saturated porous media is put forward. The wave propagation in transversely isotropic elasto-plastic fluid-saturated porous media is investigated based on the dynamic constitutive model and the time-domain explicit finite element method given out in this paper， and calculating results are compared with those of elastic wave propagation. Calculating results show that the dynamic response of transversely isotropic elasto-plastic fluid-saturated porous media is remarkably different from that of elastic porous media，that is the peak value of elasto-plastic dynamic response has remarkable increase relative to that of elastic dynamic response，and the figures of time history are different significantly from each other for elasto-plastic dynamic response and elastic dynamic response of transversely isotropic fluid-saturated porous media. In the meanwhile， numerical calculations carried out in this paper indicate that the time-domain explicit finite element method is effective for the wave propagation in transversely isotropic elasto-plastic fluid-saturated porous media. |
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