轴对称非线性有限元应力波传播计算程序及其对某工程的应用

本程序采用非线性变模量模型,并应用了岩石的无侧向应变加卸载试验曲线和动抗拉强度。计算中用应力波传播的加卸载判别准则来决定单元的加卸载状态,对受拉破坏单元进行内部应力调整和应力转移。使用增量法求得每个时刻的位移、速度、加速度和应力、应变。结果表明计算的和实测的应力应变比较接近。

An Axial Symmetric Nonlinear Finite Element Program for Computing Stress Wave Propagation and Its Application in Engineering

This Program adopts nonlinear variable-modular, uses uniaxial strain load-unload curve of rocks and dynamic tensile strength. In calculation, adopted load-unload criterion of stress wave propagation was to decide load-unload state of element and to adjusts and transfers internal stress for tensile failure element as well. The program uses incremental method to obtain displacements, velocity acceleration, stresses and strains for any instant. The results show that stresses and strains of calculation are well coincident with those from measurements.