DETECTION OF NONLINEARITY IN VIBRATIONAL SYSTEMS USING THE SECOND TIME DERIVATIVE OF ABSOLUTE ACCELERATION
DETECTION OF NONLINEARITY IN VIBRATIONAL SYSTEMS USING THE SECOND TIME DERIVATIVE OF ABSOLUTE ACCELERATION
复制标题
使用绝对加速度的二阶导数检测振动系统的非线性
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Koyama
中科院分区：
文献类型：
--
作者：
M. Wakui;J. Iyama;T. Koyama
本文提出了一种利用绝对加速度的二阶导数来检测恢复力非线性的标准，该标准通常被称为突变。为了研究snap在检测系统刚度变化方面的能力，进行了地震反应分析。分析结果表明，在瞬变时程中可以观察到与屈服位置相吻合的不连续跳跃信号。因此，可以说，一般来说，可以通过观察瞬变时间历史来检测由于刚度变化引起的损坏。
This paper shows a criteria to detect nonlinearity in the restoring force using the 2nd time derivative of the absolute acceleration, which is often referred to as snap. In order to investigate the capability of snap in detecting changes in the stiffness of the system, earthquake response analysis was conducted. The analysis results show that discontinuous jump like signals, which coincide with the yielding locations, can be observed in the snap time histories. Thus one can say that in general, it is possible to detect damage due to change in stiffness through observation of the snap time history.