摘要
本文首先讨论了计算单自由度系统相对速度递归公式所存在的问题,然后根据递归方程不变性和中心差分,得到了新的计算单自由度系统相对速度地震反应的递归公式,分析了新公式的误差精度。在此基础上,利用地震仪原理,提出了由加速度记录实时恢复地动速度的计算方法。
This paper firstly discusses the problems which exist in recursive formula for calculating relative velocity of single-degree-of freedom (SDOF) system. Then based on the invariability of recursive equation and center difference, the paper can obtain new recursive formula for calculating relative velocity response of SDOF system, and analyze the precision of that formula. On the basis of above-mentioned research results, the paper presents the real-time numerical recursive method for simulating ground velocity by using the digital accelerograph based on the principle of simple seismic sensors.
出处
《地震工程与工程振动》
CSCD
北大核心
2004年第1期49-54,共6页
Earthquake Engineering and Engineering Dynamics
基金
科技部科技基础性工作和社会公益研究专项(2003DIB2J099)
国家自然科学基金项目(50378086)
中国地震局"十五"重点科研项目
