Spectral Representation of Uncertainty in Experimental Vibration Modal Data
Spectral Representation of Uncertainty in Experimental Vibration Modal Data
复制标题
实验振动模态数据不确定性的谱表示
DOI:
10.1155/2018/9695357
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发表时间:
2018
影响因子:
--
通讯作者:
Marburg
中科院分区:
文献类型:
--
作者:
Sepahvand;Geweth;Klaerner;Marburg
It is well known that structures exhibit uncertainty due to various sources, such as manufacturing tolerances and variations in physical properties of individual components. Modeling and accurate representation of these uncertainties are desirable in many practical applications. In this paper, spectral‐based method is employed to represent uncertainty in the natural frequencies of fiber‐reinforced composite plates. For that, experimental modal analysis using noncontact method employing Laser‐Vibrometer is conducted on 100 samples of plates having identical nominal topology. The random frequencies then are represented employing generalized Polynomial Chaos (gPC) expansions having unknown deterministic coefficients. This provides us with major advantage to approximate the random experimental data using closed form functions combining deterministic coefficients and random orthogonal basis. Knowing the orthogonal basis, the statistical moments of the data are used to estimate the unknown coefficients.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
K. Sepahvand
通讯作者:
K. Sepahvand
DOI:
10.1016/j.piutam.2013.01.001
发表时间:
2013
期刊:
Procedia IUTAM
影响因子:
--
作者:
K. Sepahvand;S. Marburg
通讯作者:
S. Marburg
影响因子:
3.4
作者:
K. Sepahvand;Michael Scheffler;S. Marburg
通讯作者:
K. Sepahvand;Michael Scheffler;S. Marburg
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
R. Ghanem
通讯作者:
R. Ghanem
影响因子:
6.3
作者:
Sepahvand, K.
通讯作者:
Sepahvand, K.