基于迭代思想的纯模态实验最佳激振力幅研究
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- 英文论文题名：Research of pure modal experiment's optimal excitation force amplitude based on iterative thought
- 论文作者：冉聃 ; 沈高飞 ; 郝连奎 ; 宋汉文
- 英文论文作者：Ran Dan ; Shen Gaofei ; Hao Liankui ; Song Hanwen ; School of Aerospace Engineering and Applied Mechanics ; Tongji University ; Donghua Testing Technology Co.
- 年：2016
- 作者机构：同济大学航空航天与力学学院;江苏东华测试技术股份有限公司;
- 论文关键词：纯模态 ; 迭代 ; 纯度
- 英文论文关键词：pure modal ; iteration ; purity
- 会议召开时间：2016-08-12
- 会议录名称：第十六届全国模态分析与试验学术会议论文集
- 语种：中文
- 分类号：TH113.1
- 学会代码：ZGZH
- 会议名称：第十六届全国模态分析与试验学术会议
- 会议地点：中国天津
- 主办单位：中国振动工程学会模态分析与试验专业委员会
- 学会名称：中国振动工程学会
- 页数：10
- 文件大小：929k
- 原文格式：D
- 会议级别：全国
摘要
通过纯模态试验可以直接测量物理参数得到结构的纯模态。本文通过矩阵迭代的思想,在给出初始激振力向量的情况下,通过多次迭代最终得到满足误差要求的最佳激振力幅。得到的纯模态振型的纯度与激振器的个数、激振力的频率相关,与初始激振力大小无关。该方法能够经过极少的迭代周期获得纯模态振型,大大地降低纯模态实验的调整工作量。
The physical parameters of the pure modal can be directly measured by the pure modal test. With the matrix iterative idea,in this paper,we finally get the best exciting force amplitudes which satisfy error through multiple iteration in the case of giving Initial excitation force vector. The purity of the pure mode shape is related to the number of the vibration exciter and the frequency of the exciting force,and has nothing to do with the initial excitation force. What's more,this method can obtain the pure mode vibration mode with very little iteration period,and greatly reduce the workload of the adjustment of the pure mode experiment.
The physical parameters of the pure modal can be directly measured by the pure modal test. With the matrix iterative idea,in this paper,we finally get the best exciting force amplitudes which satisfy error through multiple iteration in the case of giving Initial excitation force vector. The purity of the pure mode shape is related to the number of the vibration exciter and the frequency of the exciting force,and has nothing to do with the initial excitation force. What's more,this method can obtain the pure mode vibration mode with very little iteration period,and greatly reduce the workload of the adjustment of the pure mode experiment.
引文
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[2]F.S.Hawkins,R.F.Mously.Resonance tests on a Beagle B206 Series Aircraft[R&M].England:HER MAJESTY'S STATIONERY OFFICE,1965.
[3]张令弥.结构动态试验技术的发展[J].振动、测试与诊断,1982,2:1-11.
[4]赵淳生.法国PRODERA公司多点激励系统—微机在结构模态试验中的应用[J].振动与动态测试.1984,6:1-5.
[5]周传荣,赵淳生.机械振动参数识别及其应用[M].北京:科学出版社.1989:112-200.
[6]杨文岐,李晓东.Modal Star 2.0纯模态测试软件设计与实现[J].结构强度研究,2012,3:25-29.
[7]郭家骅.多点相位协调及纯模态试验研究[D].江苏:南京航空航天大学,2006:1-3.
[8]罗银淼.模态迭代技术的试验研究[J].振动与冲击.2011,30(5):88-89,110.
[9]I.Bucher,S.G.Braun.Left Eigenvectors:Extraction From Measurements and Physical Interpretation[J].Journal of Mechanics,1997,64:97-105.
[10]Robert E.Coleman,Randall J.Allemang(著),刚宪约,杨茂红(译).试验结构动力学[M].北京:清华大学出版社.2012.
[11]王大均,王其申,何北昌.结构力学中的定性理论[M].北京:北京大学出版社.2014:75-127.