多维多点虚拟激励法在ANSYS中的应用

为了进一步推广多维多点虚拟激励法在工程中的应用,以通用有限元软件ANSYS谐分析模块为平台,在结构有限元模型各支撑处激励方向上置大质量块后,直接将地震虚拟激励荷载施加于大质量块上,运用绝对位移直接求解运动方程.与传统虚拟激励法相比,该法不必将绝对位移分解为拟静力位移项和动力相对位移项,避免了求解静力影响矩阵的繁琐,能更...

Pseudo excitation method applied to multi-dimensional and multi-support excitations in ANSYS

In order to promote the application of multi-dimensional and multi-support pseudo excitation method in engineering,based on general-purpose finite element software ANSYS harmonic analysis module as a platform,a large mass subjected to pseudo excitation load was put on structure support and it was conducted to directly solve the equations of motion by absolute displacement method.Compared to traditional pseudo excitation method of multi-dimensional and multi-support,directly solving method through absolute displacement does not decompose the absolute displacement into quasi-static and dynamic relative displacement items,avoids solving the static influence matrix,more efficiently realizes the multiple degree of freedom input and analysis of pseudo excitation load in the finite element software,and does not require special preparation,it will be easier for engineers to accept and use.