频域相位修正技术及其在试验模态分析中的广泛应用

PHASE MODIFICATION TECHNIQUE AND ITS APPLICATION IN EXPERIMENTAL MODAL ANALYSIS

试验模态分析的频域方法依然是工程界常用的可靠方法,基于微机和A/D转换板的软件模态分析系统因其各种优点,正在逐步取代许多专用的硬件设备。本文介绍频域相位修正技术及其在软件模态分析中的几种应用。这一技术的广泛应用,使得软件模态分析系统更具有灵活性,也拓宽了它的实际工程应用范围。

Experimental modal analysis in frequency domain is still widely used in engineering. Because of its advantages, the soft-ware modal analysis and signal processing system besed on microcomputer and A/D converter becomes more and more popular and is replacing some special hardware equipment. In this paper, the technique of phase modification in frequency domain and its applications in soft-ware modal analysis is introduced. The wide use of this technique made the soft-ware modal analysis system be more versatile and broaden its application scope.