结构动力方程Newmark-β方法递推简化分析
A Simplified Numerical Integration Format of Newmark-β Method for Structural Dynamic Equations
作者:王海波(中南大学 土木建筑学院,湖南 长沙 410075);陈伯望(湖南城市学院 土木工程学院,湖南 益阳 413000);余志武(中南大学 土木建筑学院,湖南 长沙 410075)
Author:(School of Civil Eng. and Architecture, Central South Univ., Changsha 410075,China);(College of Civil Eng., Hunan City Univ., Yiyang 413000,China);(School of Civil Eng. and Architecture, Central South Univ., Changsha 410075,China)
收稿日期:2007-03-15 年卷(期)页码:2008,40(3):47-52
期刊名称:工程科学与技术
Journal Name:Advanced Engineering Sciences
关键字:结构动力方程;Newmark-β方法;数值积分
Key words:dynamic equations of structure; Newmark-β method; numerical integration
基金项目:国家自然科学基金资助项目(50438020,10572153);湖南省教育厅资助科研项目(05B063,05A070)
中文摘要
以Newmark-β方法为基础,基于叠加原理推导出了一种新的结构动力分析数值积分递推格式,在计算位移时,不需要计算速度和加速度等中间值,因而在进行结构弹塑性地震反应分析时更为简单、方便。对该递推格式的起步条件及稳定性进行了分析。通过算例分析可以得出,当β从1/4到1/8变化时,随β的减小,计算精度越高,但稳定性越差。
英文摘要
On the basis of Newmark-β method and superpasition principle, a new simplified numerical integration format for structural dynamics is deducted. The method is simple and convenient for elastic plastic seismic response analysis because its calculated displacement is independent of velocity and acceleration. The starting condition and stability of this numerical integration format are discussed. Theoretical analysis and numerical examples showed that accuracy is better and stability is worse if the coefficient β changed from 1/4 to 1/8.
【关闭】