水下岩体冲击破坏数值模拟RHT模型参数确定方法

Determination of Parameters in RHT Model for Numerical Simulation of the Impact Failure of Underwater Rock Mass

水下岩体冲击破坏模拟过程中,岩体参数取值对破坏动态分析有重要影响,如何快速估算工程岩体RHT参数对工程施工具有重要意义。通过岩体纵波波速和Hoek-Brown准则,确定弹性模量、密度、抗压强度等岩体基本物理参数,并依据这些物理参数确定全部RHT模型参数,所得岩石参数能有效表达水下岩体物理特性,更能反映工程实际,为相关工程和研究提供参考。

In the simulation of the impact failure of underwater rock mass,parameter values of the rock mass are of great influences on the dynamic failure analysis.The quick estimation of the RHT model parameters of the rock mass is thus of great importance to engineering construction.Based on the longitudinal wave velocity of the rock mass and the Hoek-Brown criterion,basic physical parameters such as the elastic modulus,density and compressive strength are determined,and then all of the RHT model parameters are obtained according to these physical parameters.The obtained RHT model parameters can effectively reflect the physical characteristics of the underwater rock mass and the engineering conditions,which provides useful reference for relevant projects and researches.