不同应力波在张开节理处的能量传递规律

来源期刊：中南大学学报(自然科学版)2006年第2期

论文作者：王卫华 李夕兵 周子龙 张义平

文章页码：376 - 380

关键词：应力波;张开节理;能量传递系数;临界宽度;最优入射角

Key words：stress wave; open joints; energy-transmitted coefficient; critical width; optimal incident angle

摘    要：通过对应力波与张开节理相互作用过程的分析,建立应力波在张开节理处传播的解析模型。利用该模型,研究正弦波、矩形波和三角形波在张开节理处的能量传递规律。研究结果表明:不同应力波在张开节理处的传递系数均随应力波幅值的增大而增大,随空隙宽度的增大而减小;当空隙宽度大于临界宽度时,能量传递系数为0;矩形波的临界宽度最大,正弦波的次之,三角形波的最小;存在一个最优入射角,当入射角等于最优入射角时,能量传递系数达到最大值。

Abstract: Based on the analysis of interactions between stress waves and open joints, the analytic model of stress wave propagation across open joints was established. Using the established model, energy-transmitted rule of various stress waves across open joints such as sine wave, rectangle wave and triangle wave was investigated. Calculating results show that energy-transmitted coeffi cients of different stress waves increase with the increase of stress wave amplitude and decrease with the increase of gap width. There is a critical gap width which diminishes in turn from rectangle wave, sine wave to triangle wave, and there is an optimal incident angle for various stress waves with the same amplitude, duration and gap width.