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采用一维两相流模型与相应颗粒构形应力函数，研究了致密波的形成及其结构．用简化两相流模型系统地讨论致密波对有关因素的依赖关系．分析指出：小于基体材料音速的致密波仅能在非理想颗粒材料中存在，从波前到波后，所有状态物理量光滑过渡．大于基体材料音速的致密波，波头可能存在间断．应力函数与致密粘性确定后，致密波速度决定致密波结构、宽度、终态压实度．采用一维两相流模型模拟了活塞驱动颗粒床形成致密波这一动态过程．用线方法（MOL）对该方程组求数值解．计算表明，经过短暂的非稳态过程，颗粒床中形成一稳态致密波．分析了活塞速度与初始孔隙率对致密波结构的影响，并对简化两相流模型与两相流模型的计算结果进行了对比．
The one-dimensional two-phase flow model and the corresponding particle shape stress function were used to study the formation and structure of compact wave. The simplified two-phase flow model is used to systematically discuss the dependence of compact wave on related factors. It is pointed out that the compact wave less than the sonic velocity of the matrix material can only exist in the non-ideal granular material. The smooth transition of the physical quantities of all the states from wavefront to wave. Larger than the sonic velocity of the substrate wave, wave head there may be intermittent. After the stress function and the dense viscosity are determined, the compact wave velocity determines the dense wave structure, width and final compaction. A one-dimensional two-phase flow model was used to simulate the dynamic process of dense dense wave formed by the piston-driven particle bed. Use the line method (MOL) to solve the system of equations. Calculations show that a steady-state dense wave forms in the granular bed after a brief non-steady-state process. The influence of piston velocity and initial porosity on the structure of compact wave was analyzed. The comparison between simplified two-phase flow model and two-phase flow model was also made.