【摘要】 建立了冲击荷载作用下土体动力压密有限元方程及其数值计算方法。用Ansys-Ls-dyna软件包对山西化肥厂地基冲击荷载作用后土体的动力响应进行了分析,得出了冲击荷载作用下分层土体中的位移分布特征及其它们的变化过程,计算结果与实测结果吻合较好。研究结果表明:冲击荷载作用下土体位移的影响范围为一椭球体。侧向加固半径距荷载作用中心接近2D(D为夯锤直径),荷载作用中心下加固深度能达到2D甚至更大。更多还原

【Abstract】 The dynamic compaction finite element equation and the numerical analysis method of soils subjected to the impact loading are established.Ansys-Ls-dyna software is used to analyze the soil dynamic response of Shanxi Fertilizer Factory’s layer soils subjected to the impact loading.The distributed characteristics of displacement and its change courses are studied and compared with experimental figures.It proves that the calculation results approximate the experimental data.It results that the displacement influence scope of the impact load in the soils is an ellipsoid.The lateral reinforced radius from the center of loading is 2D(D is a the diameter of tamping hammer),the reinforced depth under the center of loading is also 2D or larger.更多还原