Experimental evaluation of coupling loss factors of thin plates

2001 ◽  
Vol 110 (5) ◽  
pp. 2630-2630
Author(s):  
Ryszard Panuszka ◽  
Jerzy Wiciak ◽  
Marek Iwaniec
Keyword(s):  
Experimental Evaluation ◽  
Thin Plates ◽  
Coupling Loss ◽  
Loss Factors

A Simple Statistical Energy Analysis Technique on Modeling Continuous Coupling Interfaces

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Lin Ji ◽  
Zhenyu Huang
Keyword(s):  
Energy Analysis ◽  
Modeling Technique ◽  
Thin Plates ◽  
Statistical Energy Analysis ◽  
Coupling Loss ◽  
Numerical Investigations ◽  
Analysis Technique ◽  
Coupled Subsystems ◽  
Loss Factors

In statistical energy analysis (SEA) modeling, it is desirable that the SEA coupling loss factors (CLFs) between two continuously connected subsystems can be estimated in a convenient way. A simple SEA modeling technique is recommended in that continuous coupling interfaces may be replaced by sets of discrete points, provided the points are spaced at an appropriate distance apart. Consequently, the simple CLF formulae derived from discretely-connected substructures can be applied for continuous coupling cases. Based on the numerical investigations on SEA modeling of two thin plates connected along a line, a point-spacing criterion is recommended by fitting the point- and line-connection data of the two plates. It shows that the point spacing depends on not only the wavelengths but also the wavelength ratio of the two coupled subsystems.

Measurement of SEA coupling loss factors using point mobilities

1994 ◽  
Vol 346 (1681) ◽  
pp. 465-475 ◽  
Keyword(s):  
Coupled Systems ◽  
Coupling Loss ◽  
Good For ◽  
Loss Factors

In this paper calculation of SEA coupling loss factors, using measured point mobility, is derived for coupled systems, homogeneous or not, with rigid or soft links. Some simplifications and hypothesis are necessary to fit with SEA basic relations. To validate the theory an experiment was done on plates coupled in three points; the agreement is reasonably good for homogeneous and non-homogeneous plates.

Estimation of coupling loss factors for rectangular plates with different materials and junctions

2019 ◽  
Vol 50 (9-11) ◽  
pp. 306-312
Author(s):  
Mandale Maruti Bhagwan ◽  
Bangarubabu Popuri
Keyword(s):  
Loss Factor ◽  
Energy Analysis ◽  
Acoustic Analysis ◽  
Composite Plates ◽  
Rectangular Plates ◽  
Coupling Loss ◽  
Tightening Torque ◽  
Essential Parameter ◽  
Coupling Loss Factor ◽  
Loss Factors

In statistical energy analysis, coupling loss factor is the essential parameter for vibro-acoustic analysis of complicated structures. The coupling loss factors have been estimated using energy-level difference method. The tightening torque applied at structural junction has been varied. Higher values of coupling loss factor have been observed for higher tightening torque on bolted junction. The coupling loss factors have been determined for various structural junctions of rectangular composite plates. The riveted and bolted junctions have been examined for composite plates in same plane and size. The coupling loss factors for bolted junction are relatively higher than that for riveted junction of composite plates. The values of coupling loss factors are found to increase with increasing tightening torque applied at structural junctions of composite plates. It is also noted that the experimental results of coupling loss factors for point junctions vary with changes in fiber orientations of composite plates. It is firmly believed that the various findings of the coupling loss factors in this article help for vibro-acoustic analysis of complicated structures.

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