Numerical and experimental validation of variance prediction in the statistical energy analysis of built-up systems

被引:57
作者
Cotoni, V
Langley, RS
Kidner, MRF
机构
[1] ESI US R&D Inc, San Diego, CA 92130 USA
[2] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England
[3] Virginia Polytech Inst & State Univ, Vibrat & Acoust Lab, Blacksburg, VA 24061 USA
关键词
D O I
10.1016/j.jsv.2005.07.012
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
In the statistical energy analysis (SEA) approach to vibration modeling, a complex system is represented as an assembly of coupled subsystems, and the method leads to the prediction of the vibrational energy level of each subsystem. The averaging procedures implicit in the technique imply that the predicted energy is the mean value taken over an ensemble of random structures, such as a set of vehicles leaving a production line. Recently, a new method has been developed to allow the ensemble variance, in addition to the mean, to be predicted within the context of SEA, and the present paper concerns further extension and validation of this work. The theoretical extension concerns the variance of the energy density at a single point in any of the subsystems, and the validation includes both simulation and experimental studies. The simulation results concern plate assemblies, while experimental results are presented both for a single-plate and for a cylinder-plate structure. In each case an ensemble of random structures has been generated by adding small point masses at random locations on the structure. In general, good agreement between the predictions and the validation results is observed. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:701 / 728
页数:28
相关论文
共 20 条
[1]   Distribution of eigenfrequencies for vibrating plates [J].
Bertelsen, P ;
Ellegaard, C ;
Hugues, E .
EUROPEAN PHYSICAL JOURNAL B, 2000, 15 (01) :87-96
[2]   The effect of decay rate variability on statistical response predictions in acoustic systems [J].
Burkhardt, J ;
Weaver, RL .
JOURNAL OF SOUND AND VIBRATION, 1996, 196 (02) :147-164
[3]  
BUSSOW R, 2004, P ICSVII 5 8 JUL 200, P3307
[4]  
COTONI V, 2004, ENSEMBLE VARIANCE EN
[5]  
*ESI SOFTW, 2003, AUTOSEA2 2003 US GUI
[6]   A STUDY OF UNCERTAINTY IN APPLICATIONS OF SEA TO COUPLED BEAM AND PLATE SYSTEMS .1. COMPUTATIONAL EXPERIMENTS [J].
FAHY, FJ ;
MOHAMMED, AD .
JOURNAL OF SOUND AND VIBRATION, 1992, 158 (01) :45-67
[7]   Probability distribution of statistical energy analysis model responses due to parameter randomness [J].
Huang, XL ;
Radcliffe, CJ .
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, 1998, 120 (03) :641-647
[8]  
Kompella M.S., 1993, P SAE NOIS VIBR C SO
[9]   The ensemble statistics of the band-averaged energy of a random system [J].
Langley, RS ;
Brown, AWM .
JOURNAL OF SOUND AND VIBRATION, 2004, 275 (3-5) :847-857
[10]   The ensemble statistics of the energy of a random system subjected to harmonic excitation [J].
Langley, RS ;
Brown, AWM .
JOURNAL OF SOUND AND VIBRATION, 2004, 275 (3-5) :823-846