摘要
在移动荷载引起的梁振动响应曲线的开始部分取一小段,用选定的函数对这一段曲线进行拟合,保持拟合数据长度不变,向后移动若干时刻,用同样的函数进行拟合,以此类推向后滑动。小的分段长度,可以保证对原信号的拟合精度,分段点处重复覆盖数据拟合可以保持原信号的连续特性。模型实验表明,滑动拟合法识别移动荷载的效果较好。
The data of vibration response caused by moving loads is divided into many small sections.The data of the first section and part of second section response are fitted with polynomial or Fourier series function.The data of the second section and part of first and third section response are fitted with the same function.The data of other section responses are moving fitted as the same.As the numbers of the divided sections increase,the better fitting quality is achieved.The continuity of the response at the section nodes can be guaranteed by the fitting data overlapped the section nodes.Model test results show that the moving fitting method is effective in moving loads identification.
出处
《振动．测试与诊断》
EI
CSCD
2007年第4期320-323,共4页
Journal of Vibration,Measurement & Diagnosis
基金
广州市高校科技计划资助项目(编号:62052)
关键词
荷载
识别
振动响应
曲线滑动拟合
多项式函数
傅里叶级数
load identification vibration response curve moving fitting polynomial function Fourier series
