Vibrational characteristics of truss core sandwich panel under thermal environment: effect of core topology

2018 ◽  
Vol 7 (3) ◽  
pp. 808-822 ◽  
Author(s):  
Vinod Bhagat ◽  
M. P. Arunkumar ◽  
S. Kirubanidhi Jebabalan
Keyword(s):  
Sandwich Panel ◽  
Thermal Environment ◽  
Environment Effect ◽  
Truss Core ◽  
Vibrational Characteristics

Bending and free vibration analysis of foam-filled truss core sandwich panel

2016 ◽  
Vol 20 (5) ◽  
pp. 617-638 ◽  
Author(s):  
MP Arunkumar ◽  
Jeyaraj Pitchaimani ◽  
KV Gangadharan
Keyword(s):  
Free Vibration ◽  
Vibration Analysis ◽  
Sandwich Panel ◽  
Closed Form Solution ◽  
Free Vibration Analysis ◽  
Element Model ◽  
Form Solution ◽  
Numerical Comparison ◽  
Truss Core ◽  
Foam Filled

This paper presents the studies carried out on bending and free vibration behavior of truss core sandwich panel filled with foam typically used in aerospace applications. Equivalent stiffness properties for foam-filled truss core sandwich panel are derived by idealizing 3D foam-filled sandwich panel to an equivalent 2D orthotropic thick plate continuum. The accuracy of the derived elastic property is ensured by the numerical comparison of free vibration response of 3D and its equivalent 2D finite element model. The derived stiffness constants were used in closed form solution to evaluate the maximum deflection of the continuum. The results show that the free vibration and static behavior of the sandwich panel can be enhanced in due consideration to the space constraint by filling foam in the empty space of core. The results also reveal that triangular core foam-filled sandwich panel deflects less compared to other cores. From the free vibration analysis, effect of filling foam is effective in cellular and trapezoidal core.

Impacts of structure characteristics on the thermal environment effect of city parks

2014 ◽  
Vol 34 (12) ◽  
Author(s):  
冯悦怡 FENG Yueyi ◽  
胡潭高 HU Tangao ◽  
张力小 ZHANG Lixiao
Keyword(s):  
Thermal Environment ◽  
Environment Effect ◽  
City Parks ◽  
Structure Characteristics

Effect of longitudinal deformation on wave propagation in truss core sandwich panel

2020 ◽  
pp. 095745652096488
Author(s):  
Sun Liang ◽  
Xiao Yougang
Keyword(s):  
Transverse Direction ◽  
Sandwich Panel ◽  
Sandwich Panels ◽  
Theoretical Models ◽  
The Other ◽  
Full Model ◽  
Longitudinal Deformation ◽  
Compressive Wave ◽  
High Frequencies ◽  
Truss Core

The longitudinal deformation has been ignored by most previous study on vibroacoustic behaviours of truss core sandwich panels. This paper investigates its effect by developing two theoretical models. One, named as full model, considers both flexural and longitudinal deformation of face sheets while the other, named as flexural model, incorporates only flexural deformation. By comparing free characteristic waves obtained from two models, one find that flexural model ignore two waves, that is, a compressive wave and a global flexural one. The ignored waves cause vibration in transverse direction even at high frequencies, and thus result in vibration peaks under forced vibration. Therefore the flexural model would underestimate the vibration response, and the longitudinal deformation of face sheets cannot be ignored during dynamic analysis of the sandwich panels.

Sign in / Sign up

Export Citation Format

Share Document