scholarly journals SOUND TRANSMISSION THROUGH A RIB-STIFFENED PLATE: COMPARISONS OF A LIGHT-FLUID APPROXIMATION WITH EXPERIMENTAL RESULTS

2002 ◽  
Vol 249 (1) ◽  
pp. 206-212 ◽  
Author(s):  
C. MAURY ◽  
P.-O. MATTEI
Keyword(s):  
Sound Transmission ◽  
Experimental Results ◽  
Stiffened Plate ◽  
Fluid Approximation

SOUND TRANSMISSION THROUGH A THIN BAFFLED PLATE: VALIDATION OF A LIGHT FLUID APPROXIMATION WITH NUMERICAL AND EXPERIMENTAL RESULTS

2000 ◽  
Vol 229 (5) ◽  
pp. 1157-1169 ◽  
Author(s):  
P.J.T. FILIPPI ◽  
P.-O. MATTEI ◽  
C. MAURY ◽  
A.H.P. VAN DER BURGH ◽  
C.J.M. DE JONG
Keyword(s):  
Sound Transmission ◽  
Experimental Results ◽  
Fluid Approximation

scholarly journals Analysis of the transmission loss of double-leaf panels with an equivalent spring–mass model for studs

2020 ◽  
Vol 37 ◽  
pp. 126-133
Author(s):  
Yuan-Wei Li ◽  
Chao-Nan Wang
Keyword(s):  
Distribution Curve ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Experimental Results ◽  
Sound Insulation ◽  
Sound Transmission Loss ◽  
Mass Model ◽  
Steel Stud ◽  
Panel Thickness ◽  
Stiffness Distribution

Abstract The purpose of this study was to investigate the sound insulation of double-leaf panels. In practice, double-leaf panels require a stud between two surface panels. To simplify the analysis, a stud was modeled as a spring and mass. Studies have indicated that the stiffness of the equivalent spring is not a constant and varies with the frequency of sound. Therefore, a frequency-dependent stiffness curve was used to model the effect of the stud to analyze the sound insulation of a double-leaf panel. First, the sound transmission loss of a panel reported by Halliwell was used to fit the results of this study to determine the stiffness of the distribution curve. With this stiffness distribution of steel stud, some previous proposed panels are also analyzed and are compared to the experimental results in the literature. The agreement is good. Finally, the effects of parameters, such as the thickness and density of the panel, thickness of the stud and spacing of the stud, on the sound insulation of double-leaf panels were analyzed.

Experimental Investigation into the Buckling Behavior of an Advanced Grid Stiffened Plate by a Fringe Projection Profilometry System

2011 ◽  
Vol 217-218 ◽  
pp. 1153-1158 ◽  
Author(s):  
Ming Fa Ren ◽  
Qi Zhong Huang ◽  
Hao Ran Chen
Keyword(s):  
Experimental Investigation ◽  
Failure Mode ◽  
Composite Plate ◽  
Axial Loading ◽  
Experimental Results ◽  
Fringe Projection ◽  
Stiffened Plate ◽  
Local Skin ◽  
Buckling Behavior ◽  
Fringe Projection Profilometry

This article demonstrates the buckling behavior of an advanced grid stiffened (AGS) composite plate under an axial loading. The experimental results acquired by a fringe projection profilometry system shows that the buckling of the AGS plate would gradually evolved from a local skin buckling to a global ribs buckling during the experiment. Kinds of failure mode would arise while the loading increasing, though an impressive peak loading was recorded before the AGS plate was crush. The whole-field deformation of the AGS plate during the experiment was retrieved by the fringe projection profilometry system.

Sound Insulation Property of Bionic Thin-Walled Stiffened Plate Based on Plants Venations Growth Mechanism

2014 ◽  
Vol 20 ◽  
pp. 35-44
Author(s):  
Wei Yuan Wang ◽  
Yuan Yuan Li ◽  
Hai Sheng Shu
Keyword(s):  
Noise Reduction ◽  
Influence Factor ◽  
Sound Transmission ◽  
Sound Insulation ◽  
Stiffened Plate ◽  
Transmission Losses ◽  
Insulation Property ◽  
Plate Structures ◽  
Leaf Venation ◽  
Thin Walled

The leaf can be seen as shin plate structures with stiffener(vein) and the venation distributions are closed related to the external environment load. Leaf venation growing algorithm (VGA) is the abstract description of vein growing process and reflects an ideological of learning from nature. This article concerns the sound insulation property of thin-walled stiffened plates. Numerical method is used to analyze three types of plants: non-stiffened plate, traditional stiffened plate and VGA stiffened plate. The VGA stiffened plate optimized by leaf venations growth algorithm method can reflect the influence of venations layout structure on the noise reduction performance of forest belts. The computational model of sound transmission through a stiffened plate excited by a harmonic oblique incident plane wave and mounted in an infinite baffle using the coupled finite element/boundary element approach is presented. The proposed model also takes the acoustic fluid- structure coupling into account. The results show that the sound transmission losses are closely dependent on the natural frequency. The sound transmission losses of bionic thin-walled stiffened plate are 0.17-2.45dB more than that of traditional stiffened plate in the range of 900-2000Hz. It indicated that the layout of stiffeners is an influence factor for noise reduction for plate structures, just like that of vein layout for tree belts. There is a certain merit to use the method of bionic plant leaves for acoustic optimization.

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