2015, Volume 17, Issue 1
Strategic Study of CAE >> 2015, Volume 17, Issue 1
Identification of system mode parameters using response measurement only
1. College of Civil Engineering, Hunan University, Changsha 410082, China;
2. College of Civil Engineering, Xuchang University, Xuchang, Henan 461000, China
Next Previous
Abstract
With the broadest application and development of modal analysis method， the demands such as less restrictive conditions and to increase the reliability of an analysis have been increased for more convenience in engineering applications. This paper presents a new modal analysis method without input data and any analytical models. Harmonic parameters of a point response can be extracted by spectrum analysis using the measurements obtained from structural testing. Preliminary results calculated by discrete deconvolution techniques are further modified by the frequency domain space curve fitting method. Modal parameters of system just come from a combination of these corrected results. The performed analysis and validation of real data indicate that the approach is feasible for engineering. Therefore， this paper provides the effective estimation scheme of modal parameters for experiment research on the system dynamic performance.
Keywords
output-only response ; identification of system mode parameters ; space curve fitting ; spectrum overlapping
Figures
图1
图2
图3
图4
图5
图6
图7
图8
图9
图10
图11
图12
References
[ 1 ] Mevel L，Benveniste A，Basseville M，et al. Input/output versus output-only data processing for structural identification—Application to in- flight data analysis [J]. Journal of Sound and Vibration，2006，295(3-5)：531-552. link1
[ 2 ] Lin R M，Lim M K. Modal analysis of close modes using perturbative sensitivity approach [J]. Engineering Structures，1997，19 (6)：397-406. link1
[ 3 ] Deraemaeker A，Reynders E，Roeck G D，et al. Vibration-based structural health monitoring using output-only measurements under changing environment [J]. Mechanical Systems and Signal Processing，2008，22(1)：34-56. link1
[ 4 ] Rainieri C，Fabbrocino G. Automated output-only dynamic identification of civil engineering structures [J]. Mechanical Systems and Signal Processing，2010，24(3)：678-695. link1
[ 5 ] Parloo E，Vanlanduit S，Guillaume P，et al. Increased reliability of reference- based damage identification techniques by using output-only data [J]. Journal of Sound and Vibration，2004，270 (4-5)：813-832. link1
[ 6 ] Porras J A，Sebastian J D，Casado C M，et al. Modal mass estimation from output- only data using oscillator assembly [J]. Mechanical Systems and Signal Processing，2012，26：15-23. link1
[ 7 ] Spiridonakos M D，Poulimenos A G，Fassois S D. Output-only identification and dynamic analysis of time- varying mechanical structures under random excitation：A comparative assessment of parametric methods [J]. Journal of Sound and Vibration，2010， 329(7)：768-785. link1
[ 8 ] Lardies J，Minh- Ngi T. Modal parameter identification of stay cables from output- only measurements [J]. Mechanical Systems and Signal Processing，2011，25(1)：133-150. link1
[ 9 ] Ling Xiaolin，Haldar A. Element level system identification with unknown input with rayleigh damping [J]. Journal of Engineering Mechanics，2004，130(8)：877-885. link1
[10] Sohn H，Farrar C R，Hemez F M. A review of structural health monitoring literature 1996—2001 [R]. New mexico USA：Los Alamos National Laboratory Report，2003. link1
[11] Salawu O S. Detection of structuraldamage through changes in frequency：A review [J]. Engineering Structures，1997，19(9)：718-723. link1
[12] Ruzzene M，Fasana A，Garibaldi L，et al. Natural frequencies and dampings identification using wavelet transform：Application to real data [J]. Mechanical Systems and Signal Processing，1997，11(2)：207-218. link1
[13] Slavic J，Simonovski I，Bboltežar M. Damping identification using a continuous wavelet transform：Application to real data [J]. Journal of Sound and Vibration，2003，262(2)：291-307. link1
[14] Avitabile P. Part 5：101 ways to extract modal parameters— Which one is for me? [J]. Experimental Techniques，2006，30 (5)：48-56. link1
[15] 胡 岚，马克俭. U形钢板-混凝土高强螺栓连接组合空腹夹 层板楼盖结构研究与应用 [J]. 建筑结构学报，2012，33(7)： 61-69. link1
京公网安备 11010502051620号
