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移动单元法在处理移动荷载下结构动力行为分析方面具有求解高效的优势,但目前针对饱和多孔介质动力响应的移动单元法的研究成果甚少。根据饱和多孔介质u-p格式动力控制方程,利用移动坐标系建立了饱和多孔介质瞬态及稳态动力控制方程的移动单元列式,通过编制相应的计算程序将计算结果与已有文献结果对比验证了算法的正确和有效性。基于移动单元法建立了移动荷载下饱和沥青路面-弹性基层系统计算模型,分析了移动荷载下该模型的瞬态动力响应规律,并与其稳态动力响应进行了对比分析,分析表明,其水动力特性较稳态响应呈现出明显的瞬态效应。基于稳态动力响应结果分析了荷载速度、排水边界、渗透系数对饱和沥青路面动力响应的影响规律,算例研究结果可以为分析水动力作用下沥青路面水稳定性功能损伤机制提供参考。
The moving element method has the advantage of high efficiency in dealing with structural dynamic behavior analysis under moving loads. However, there are few researches on the moving element method for the dynamic response of saturated porous media. According to the dynamic governing equation of up format in saturated porous media, the moving element equations of transient and steady-state governing equations for saturated porous media are established by using moving coordinate system. Comparing the calculated results with the existing literature results The correctness and validity of the algorithm. Based on the moving element method, the calculation model of saturated asphalt pavement - elastic basement system under moving loads is established. The transient dynamic response of the model under moving loads is analyzed and compared with the steady state dynamic response. The analysis shows that the hydrodynamic The characteristics of steady-state response showed a significant transient effect. The influence of load velocity, drainage boundary and permeability coefficient on the dynamic response of saturated asphalt pavement is analyzed based on the steady state dynamic response results. The results of the study can provide reference for the analysis of the functional damage mechanism of asphalt pavement water stability under hydrodynamic conditions.