文章摘要
盛美萍.频带内外模态对频带阻尼特性的影响[J].声学技术,2001,(2):56~58
频带内外模态对频带阻尼特性的影响
Influence of modes on the damping of frequency band
投稿时间:1999-11-11  修订日期:2000-03-28
DOI:
中文关键词: 模态  阻尼  频带
英文关键词: mode  damp  frequency band
基金项目:国家自然科学基金(批准号:59805013);航空科学基金资助项目
作者单位
盛美萍 西北工业大学航海工程学院, 西安 710072 
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中文摘要:
      频带的阻尼特性主要由带内模态确定,同时受带外模态影响。文章首先从理论上研究了频带内仅有一个模态时的频带阻尼特性;在此基础上以频带内含有双模态的系统为例,分析了多模态频带的阻尼特性;考虑到频带内外模态相互耦合的作用,以带内外各含一个模态的耦合系统为例,分析了模态耦合对频带阻尼特性的影响。理论研究的结果可为今后对多模态系统带宽阻尼测试的实验修正提供理论依据。
英文摘要:
      The damping of frequency band is mainly determined by modes within the frequency band.It is also influenced by modes near the band.The difference between the damping of mode and that of the band is compared under the condition that only one mode exists in the band.A two mode system is then studied for the influence of modes on the damping of the band.Because of the coupling,modes outside the frequency band also has influenece on the damping of the band.The influence of modes both inside and outside the band is analyzed theoretically,and the result is useful in further modification of experimental results.
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