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利用一个经过广泛验证的数值模型FSSI-CAS 2D为计算工具,采用砂土的高级本构模型Pastor-Zienkiewicz-Mark III(PZIII)描述海床砂土的动态力学行为,定量研究松散海床地基土在波浪作用下,其内部的液化过程和特征,以加深对波致海床液化特征、性质的认识。计算结果分析表明,开发的耦合数值模型FSSI-CAS 2D能够很好地捕捉到波浪作用下欠密实海床的动力响应特征,以及海床内的累积液化过程等一些列的非线性物理现象。研究表明,波浪导致的松砂海床液化是一个渐进过程,海床表面首先液化,并逐渐向下扩展。
A widely validated numerical model named FSSI-CAS 2D was used as a tool to describe the dynamic behavior of the seabed sandy soil using the advanced constitutive model Pastor-Zienkiewicz-Mark III (PZIII) Under the action of waves, its internal liquefaction process and characteristics deepen the understanding of the characteristics and properties of liquefied sea waves. The calculated results show that the coupled coupled numerical model FSSI-CAS 2D can capture some of the nonlinear physical phenomena such as the dynamic response characteristics of under-dense sea bed and the cumulative liquefaction process in the seafloor. Studies have shown that wave-induced liquefaction of the loose sand sea bed is a gradual process, with the surface of the seabed liquefying first and gradually expanding downward.