基于AR算法的小波技术在随机场模拟中的应用

徐 林;叶继红

振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 64-72.

PDF(2747 KB)
PDF(2747 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 64-72.
论文

基于AR算法的小波技术在随机场模拟中的应用

  • 徐 林;叶继红
作者信息 +

Application of wavelet technique based on ARmethod in random field simulation

  • Xu Lin ; Ye Jihong
Author information +
文章历史 +

摘要

本文采用线性滤波器法中的AR法模拟生成了地震动场和风场的时程信号。由于AR算法具有很高的计算效率,但模拟精度却不理想,故引入小波分析中的小波分解方法和小波包分解方法对AR算法模拟的信号进行调整,并对这两种方法改进的效果进行对比。算例分析表明由改进的AR法得到的样本信号频谱与目标谱吻合良好,且发现小波包分解方法调整信号具有比小波分解方法更好的精度。

Abstract

The time histories of signals in earthquake motion field and wind field were simulated with the help of AR (HTautoregression) methodTH.In view of,the deficiency if low accuracy by yes if AR method, the signals simulated were modified by wavelet decomposition as well as wavelet packet decomposition methods. The improvement measures were discussed in detail. Several examples show that the simulated spectra by the improved AR method are in good agreement with the corresponding target spectra. Furthermore, the signals modified by the wavelet packet decomposition method are of better precision than those modified by the wavelet decomposition method.

关键词

AR法 / 数值模拟 / 地震动场 / 风场 / 小波分解 / 小波包分解

Key words

AR method / numerical simulation / earthquake motion fieldTH / wind field / wavelet decomposition / wavelet packet decomposition

引用本文

导出引用
徐 林;叶继红. 基于AR算法的小波技术在随机场模拟中的应用[J]. 振动与冲击, 2010, 29(8): 64-72
Xu Lin;Ye Jihong. Application of wavelet technique based on ARmethod in random field simulation[J]. Journal of Vibration and Shock, 2010, 29(8): 64-72

PDF(2747 KB)

Accesses

Citation

Detail

段落导航
相关文章

/