利用离散模型数值模拟了饱和砂土落地冲击实验引起砂样内动孔隙水压力的周期变化 ,指出了出现负压截断的原因 ,给出了孔隙水压力的周期与装砂结构固有频率的关系以及冲击载荷 (对应于实验中的砂土下落高度 )对孔压的影响
By distinct model, it is presented to simulate the change of dynamic pore pressure induced by the test sample of saturated sand falling down to the floor. From the investigation, the reason is explained why minus pressure is cut off. The relation between dynamic pore pressure period and the natural frequency of the experiment set for sand sample is obtained and the effect of impact load on pore pressure is given, too.
Chinese Journal of Rock Mechanics and Engineering
impact to the floor, distinct, saturated sand, minus pore pressure cut off