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以大型有限元软件ANSYS为平台,将地震荷载转化为等效节点荷载,通过对比4种不同人工边界条件对地震波的吸收效应,验证了采用粘弹性人工边界在有限元模型时域数值分析方法中的合理性,分析了不同频率下动荷载对结构动力反应的影响,并以福州市闽江防洪堤工程为例,对比分析了在传统的固定边界与粘弹性人工边界两种边界条件下防洪堤的地震响应。结果表明,粘弹性人工边界方法精度高、易于实现、实用性强。
Based on the large finite element software ANSYS, the seismic load was transformed into the equivalent node load. By comparing the absorption effects of four artificial boundary conditions on the seismic wave, the viscoelastic artificial boundary was verified in the numerical analysis of the finite element model The influence of dynamic loads on the dynamic response of structures at different frequencies is analyzed. Taking the Minjiang Flood Control Dam Project in Fuzhou as an example, the influences of the two kinds of boundary conditions, ie the traditional fixed boundary and viscoelastic artificial boundary, Earthquake response. The results show that the viscoelastic artificial boundary method is of high precision, easy to implement and practical.