ABAQUS中黏性边界条件的实现及应用

发布时间：2018-05-28 09:50

本文选题：ABAQUS + 黏性边界　；参考：《防灾减灾工程学报》2017年02期

【摘要】：波动数值模拟时,基底直接输入地震波会导致波动能量在计算域内往复反射,影响分析结果的可靠性。应用黏性边界条件模拟无限地基的辐射阻尼效应,基于波动理论及Spring/Dashpots单元实现了ABAQUS软件中黏性边界条件的施加,进而对弹性半空间的波源问题和散射问题进行波动数值模拟,并验证了黏性边界条件的有效性。采用黏性边界和固定边界条件计算响V!台阵3号测井的土层地震反应,并将计算结果与实际记录进行对比分析。结果表明,固定边界会造成散射波往复反射,放大了地表的地震响应,黏性边界能吸收散射的波动能量,能够较好地模拟土层地震反应。
[Abstract]:In numerical simulation of wave, the direct input of seismic wave from the base will cause the wave energy to be reflected back and forth in the computational domain, which will affect the reliability of the analytical results. The radiation damping effect of infinite foundation is simulated by using viscous boundary conditions. Based on wave theory and Spring/Dashpots element, the application of viscous boundary conditions in ABAQUS software is realized, and the wave source problem and scattering problem in elastic half-space are simulated numerically. The validity of the viscous boundary condition is verified. The viscous boundary and fixed boundary conditions are used to calculate the response V! The seismic response of the soil layer of logging No. 3 is analyzed and compared with the actual records. The results show that the fixed boundary can cause the reciprocating reflection of scattering wave, amplify the seismic response of the surface, and the viscous boundary can absorb the wave energy of scattering, and can simulate the seismic response of soil layer well.
【作者单位】：防灾科技学院;中国地震局工程力学研究所;
【基金】：中央高校基本科研业务费研究生科技创新基金项目(ZY20150302) 中国地震局地震科技星火计划项目(XH15067Y) 国家自然科学基金项目(51508096)资助
【分类号】：TU435

【相似文献】