【摘要】 在地震作用下,采用无质量固定边界模型会引入不真实的反射地震波,无法模拟地震波的远域能量逸散效应。基于波动理论及ABAQUS有限元软件二次开发功能实现了粘弹性单元的开发和外源波动的输入。采用粘弹性人工边界模拟地震波外源波动的远域能量逸散效应,并与固定边界模型计算结果比较。数值模拟结果表明粘弹性人工边界计算结果更接近地震波的真实传播。开发的粘弹性人工边界单元提高了ABAQUS的适用性,对促进大型或复杂工程的粘弹性人工边界波动分析具有潜在的应用价值。更多还原

【Abstract】 With earthquake excitation,the fixed boundary model without consideration of the mass of foundation will introduces nonexistent reflection seismic waves and can not simulate the real transmission of seismic waves.Based on wave motion theories and the redevelopment of ABAQUS finite element software,the development of visco-elastic elements and external waves accurate input were realized.Using visco-elastic artificial boundary to simulate external waves far field energy dissipation,the results are compared with those by fixed boundary model.The results show that the artificial boundary gives more realistic simulation of seismic wave transmission.The redevelopment of visco-elastic artificial boundary improves the feasibility of ABAQUS,which has the potential application value to promote the applicability of visco-elastic artificial boundary in the large or complex engineering.更多还原