| 相关分析在结构阻尼比时域衰减法测量中的应用 |
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| 引用本文： | 翁震平,席亦农. 相关分析在结构阻尼比时域衰减法测量中的应用[J]. 船舶力学, 2009, 13(4) |
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| 作者姓名： | 翁震平 席亦农 |
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| 作者单位： | 哈尔滨工程大学自动化学院,哈尔滨150001;中国船舶科学研究中心,江苏无锡214082;中国船舶科学研究中心,江苏无锡,214082 |
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| 摘 要： | 如何准确地测量结构阻尼比,特别是在高频段模态密集区的结构阻尼比一直是一个悬而未决的问题,传统的频域半功率带宽法和时域衰减法由于各自的局限性而无法得到理想的结果。文中将相关分析应用于时域衰减法测量结构阻尼比的数据处理中,通过仿真计算,成功地将激励频率下的结构振动响应从混合有噪声和其它干扰频率成份的测量信号中提取出来,并准确地计算出激励频率下的结构阻尼比。该方法可应用于结构阻尼比的时域衰减法测量中。
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| 关 键 词： | 结构阻尼比 时域衰减法 自相关函数 互相关函数 |
Application of correlation analysis in structural damping ratio measurement using time-domain attenuation method |
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| WENG Zhen-ping,XI Yi-nong. Application of correlation analysis in structural damping ratio measurement using time-domain attenuation method[J]. Journal of Ship Mechanics, 2009, 13(4) |
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| Authors: | WENG Zhen-ping XI Yi-nong |
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| Affiliation: | 1 College of Automation;Harbin Engineering University;Harbin 150001;China;2 China Ship Scientific Research Center;Wuxi 214082;China |
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| Abstract: | How to accurately measure the structural damping ratio,especially in high frequency band with intensive modes,has always been an outstanding issue.Traditional frequency-domain half-power bandwidth method and time-domain attenuation method could not reach the ideal results for the limitations of their own.In this paper,correlation analysis is applied in the data processing in structural damping ratio measurement using time-domain attenuation method.Through simulation calculation,the structural vibration resp... |
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| Keywords: | structural damping ratio time-domain attenuation method auto-correlation function cross-correlation function |
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