本文用福洛开理论和多尺度方法，分别研究了其稳定域范围和引起倍频振动的各种因素。
The reason is analysed by use of Floquet theory and multiple scales method in the paper.
轧机第五倍频程颤振表现为高频微幅的自激稳态振动。
Fifth-octave mode chatter is most likely to occur in the form of self-excited steady vibration.
利用双晶片的弯曲振动模式可以制造出结构简单、成本低廉的电声倍频器、混频器，可适用于整个低频范围。
Useing the bimorph bend vibration mould, a simple and low cost electroacoustic doubler and mixer available for overall low frequency band can be produced.
解决噪声1/3倍频程、声功率、音调窄带谱，振动频谱等复杂功能的在线分析与处理。
A lot of complex functions, such as 1/3 octave analysis, sound power, tonality narrow band analysis, vibration spectrum, have been solved.
解决噪声1/3倍频程、声功率、音调窄带谱，振动频谱等复杂功能的在线分析与处理。
A lot of complex functions, such as 1/3 octave analysis, sound power, tonality narrow band analysis, vibration spectrum, have been solved.
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