地球物理学进展 ›› 2004, Vol. 19 ›› Issue (2): 481-485.doi:

• 论文 • 上一篇    

轴向压力下砂岩波速的实验研究

杨宏峰, 施行觉   

  1. 中国科学技术大学地球与空间科学学院,合肥,230026
  • 收稿日期:2004-04-10 修回日期:2004-05-10 出版日期:2004-06-25 发布日期:2004-06-25
  • 作者简介:杨宏峰:1978年生,男,汉族,辽宁海城人,中国科学技术大学地球与空间科学学院硕士研究生,主要从事岩石力学方面的研究.(Email:yhf@mail.ustc.edu.cn)
  • 基金资助:

    国家自然科学基金项目(No.40274057)资助.

Experimental research on wave velocity under axial pressure

YANG Hong-feng, SHI Xing-jue   

  1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
  • Received:2004-04-10 Revised:2004-05-10 Online:2004-06-25 Published:2004-06-25

摘要: 对轴向压力下的砂岩波速进行了实验研究.结果表明,波速随着压力的增加而增加,并且与加卸载循环有关.对非线性模量与应变的关系进行了拟合.用非线性模量来替代弹性模量,推导出了轴向压力下干燥砂岩样品的波速计算公式,得到了速度和应变的关系曲线.实验数据与理论曲线有较好的一致性.

Abstract: In this article, experimental researches are made on the wave velocity of sandstones under axial pressure. The results show that, the wave velocity will increase with the increase of pressure and is closely related to the circulation of loading and unloading. The fitting is also made on the relations between the nonlinear modulus and strain. By replacing the traditional elastic model with the nonlinear model, the new formulas are deducted to calculate the wave velocity of dry sandstones under axial pressure and the relation curves of velocity and strain are given. The experimental data matches well with the theoretical curves.

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