基于数字散斑相关方法的岩石力学参数反演研究

Study on Inversion Calculation of Rock Mechanical Parameter Based on the Digital Speckle Correlation Method

本文基于数字散斑相关方法对岩石力学参数进行反演研究.通过岩石单轴压缩实验,以数字散斑相关方法作为实验观测手段,分析得到岩石试件表面位移场.以岩石表面位移场作为已知量,根据变分原理建立优化方程,求解得到岩石的弹性模量E和泊松比μ.研究结果表明这种方法可以有效测量岩石材料的力学参数,为进一步深入研究岩石材料非均匀力学参数提供参考.

In this paper, a study of inversion of the rock mechanical parameters was conducted according to the Digital Speckle Correlation Method. Through the uniaxial compression experiment of rock, the surface displacement field of rock specimen was obtained with the Digital Speckle Correlation Method. The displacement field of rock surface as the known quantity, the optimization equation is established according to the variational principle and the elastic modulus and poison’s ratio of rock are obtained. The results show that this method can effectively measure the mechanical parameters of rock materials and provide reference for further research on the non-uniform mechanical parameters of rock materials.