摘要
土石坝的动力非线性数值仿真分析中,合理的人工边界条件能够正确模拟模型边界处波的传播特性,提高数值计算精度。以西藏旁多土石坝为例,基于ABAQUS软件分别采用有限元和无限元方法对不同边界条件下土石坝的非线性动力响应规律进行对比分析。分析边界条件对不同工况、不同覆盖层深度、不同输入地震波幅值作用下动力响应结果的影响。结果表明:无限元边界和黏弹性边界数值模拟结果的精度均较高,其中黏弹性边界能够更真实地反映地震作用机理。
In the dynamic nonlinear numerical simulation analysis of earth-rock dams,reasonable artificial boundary conditions can correctly simulate the wave propagation characteristics at the boundary of the model and improve the numerical calculation accuracy.This paper takes multiple earth-rock dams near Tibet as an example,uses finite element and infinite element methods to compare and analyze the nonlinear dynamic response laws of earth-rock dams under different boundary conditions based on ABAQUS software.It analyzes the influence of boundary conditions on the dynamic response results under different working conditions,different overburden depths,and different input seismic wave amplitudes.The results show that the accuracy of the numerical simulation results of the infinite element boundary and the viscoelastic boundary are both high,and the viscoelastic boundary can reflect the earthquake action mechanism more truly.
作者
吴悦
郭永刚
胡锦
WU Yue;GUO Yong-gang;HU Jin(Tibet Agriculture and Animal Husbandry University,Nyingchi 860000,Tibet,China)
出处
《中国农村水利水电》
北大核心
2021年第6期169-173,共5页
China Rural Water and Hydropower
基金
2017年研究生教育改革与创新(藏财教指2018-6号)(502218004)。
关键词
人工边界
非线性
动力响应
artificial boundaries
non-linearity
dynamic response
