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基于物质点方法(material point method,MPM)理论框架,提出了处理饱和多孔介质与固体间动力接触问题的新方法。其中饱和多孔介质的动力学响应通过文献[1]中发展的耦合物质点方法进行分析,单相固体的力学行为由传统单相物质点方法进行预测。通过本文提出的接触算法使二者相结合,在保证饱和多孔介质与固体间不存在相互穿透的前提下,允许饱和多孔介质与固体间的相互滑动,以预测整个接触/碰撞系统的动力学响应。同时进行了数值算例计算,通过算例验证了此方法的正确性,展示了此方法有效性。
Based on the material point method (MPM) theory framework, a new method to solve the dynamic contact problem between saturated porous media and solid was proposed. The dynamic response of saturated porous media is analyzed by the method of coupling material point developed in [1]. The mechanical behavior of single-phase solid is predicted by the traditional single-phase material point method. By the contact algorithm proposed in this paper, the two are combined to ensure the mutual sliding between the saturated porous media and the solid under the premise of non-existence of mutual penetration between the saturated porous media and the solid so as to predict the kinetics of the entire contact / collision system response. At the same time, a numerical example calculation is carried out. The correctness of this method is verified through an example, and the effectiveness of this method is demonstrated.