【摘要】 岩体中大多数的结构面表现为既非连续也非完全不连续,试验研究发现结构面的接触面积对其透射系数影响非常大。采用基于连续介质的块体离散元程序(CDEM)模拟结构面处应力波传播过程,在结构面处进行了多尺度处理,模拟结构面的凹凸不平,研究了结构面的接触面积及其分布对应力波传播的影响,拟合得到透射系数和接触面积与总面积之比的关系是:纵波为Tp=0.25 ln(r)+1.003,横波为Ts=0.252 ln(r)+0.98。而且接触面积的分布也会影响应力波的透射系数和透射波的频谱分布。更多还原

【Abstract】 Most of structural plane in rock mass is discontinuous but is not completely discontinuous.Experimental study find out that transmission coefficient is influenced greatly by contact area of structural plane.Propagation process of stress wave was simulated by CDEM(continuous block discrete element method).Roughness concentration of structural plane was simulated by multi-scale analysis on structural plane.The effects of contact area and distribution of structural plane on propagation of stress wave was studied.By fitting the relationship of transmission coefficients and the ratio of contact area to total area of structural plane was obtained: for longitudinal waveTp=0.258 ln(r) +1.003,for transverse waveTs=0.252 ln(r) +0.98.The study showed that transmission coefficients of stress wave and frequency spectrum of transmission wave are influenced by the distribution of contact area.更多还原