实用多点输入虚拟激励法在通用有限元软件中的实现  

Implementation of the practical pseudo excitation method for multi-support seismic response analysis in general FEM software

作　　者：江洋[1] 石永久[1] 王元清[1] 

机构地区：[1]土木工程安全与耐久教育部重点实验室,清华大学土木工程系,北京100084

出　　处：《地震工程与工程振动》2010年第1期46-52,共7页Earthquake Engineering and Engineering Dynamics

基　　金：高等学校博士学科点专项基金资助课题(20090002110045);长江学者和创新团队发展计划资助项目(IRT00736)

摘　　要：虚拟激励法是高效便捷的随机振动分析方法,可用于地震多点输入随机响应分析,但现有通用有限元软件无法直接实现多点输入虚拟激励法。首先将虚拟激励法改进为更实用的形式,使其便于编程实现,然后借助有限元软件ANSYS的二次开发功能实现了多点输入虚拟激励法在ANSYS中的应用,扩展了ANSYS在地震多点输入计算领域的功能,也为地震多点输入研究提供了更为简便有效的计算平台。对一简单模型多点输入的理论解析解和ANSYS计算结果进行比较,验证了该实现方法的准确性和可行性。The pseudo excitation method for multi-support seismic response analysis, which is a kind of high efficient random vibration analysis method, hasn＇ t been used in existing general FEM software. The pseudo excitation method is expressed in a practical form, which is suitable for programming realization. Then the pseudo excitation method is implemented in ANSYS by using the APDL （ANSYS Parametric Design Language）. Thus, multi-support seismic response analysis capability of ANSYS is increased, and a simple and effective approach for multi-support seismic response analysis is supplied to researchers. Comparison between numerical calculation results obtained by ANSYS and analytic results of a simple structure model is made to verify the accuracy and feasibility of the implementation method.

关 键 词：虚拟激励法 多点输入 ANSYS 二次开发 

分 类 号：P315.963[天文地球—地震学] TU311.41[天文地球—固体地球物理学]