Numerical study of unsteady problems of the magnetoelasticity of flexible axisymmetric plates and shells

1990 ◽  
Vol 26 (5) ◽  
pp. 449-453
Author(s):  
L. V. Mol'chenko
Keyword(s):  
Numerical Study ◽  
Plates And Shells ◽  
Unsteady Problems

Passive Control of a Rectangular Plate Using Strategic Cut-Outs

2005 ◽  
Author(s):  
Manfred H. Ulz ◽  
S. Eren Semercigil
Keyword(s):  
Heat Dissipation ◽  
Passive Control ◽  
Numerical Study ◽  
Classical Case ◽  
External Excitation ◽  
Dynamic Vibration Absorber ◽  
Numerical Predictions ◽  
Design Charts ◽  
Modes Of Vibration ◽  
Plates And Shells

Perforations and cut-outs are widely used in plates and shells to facilitate heat dissipation, and to provide access to different components. It is generally expected that the dynamic behavior will deteriorate because of the presence of the cut-out. As a result, vibrations due to an external excitation will be larger than those of the case without a cut-out. Summary of a numerical study is presented in this paper to investigate the possibility of making a rectangular cut-out for the purposes of employing this cut-out as a Dynamic Vibration Absorber. The concept is similar to that of the classical case. However, instead of adding an auxiliary structure, the part of the plate is suggested to act as an absorber in the form of a “designed” cut-out. The process involves numerical modeling using standard finite elements. The plate is excited with an impact force to insure the participation of the multiple modes of vibration. The numerical predictions are presented in the form of design charts to indicate the conditions under which vibration control may be possible.

Numerical study of nonlinear vibrations of plates and shells with two-frequency excitation

1991 ◽  
Vol 27 (8) ◽  
pp. 793-798
Author(s):  
V. A. Bazhenov ◽  
E. S. Dekhtyaryuk ◽  
Yu. S. Petrina ◽  
K. O. �neremadu
Keyword(s):  
Nonlinear Vibrations ◽  
Numerical Study ◽  
Plates And Shells ◽  
Frequency Excitation

Numerical study of the low-frequency atomic dynamics in a Lennard-Jones glass

1998 ◽  
Vol 77 (2) ◽  
pp. 473-484 ◽  
Author(s):  
M. Sampoli, P. Benassi, R. Dell'Anna,
Keyword(s):  
Numerical Study ◽  
Low Frequency ◽  
Lennard Jones

Numerical simulation of the tree higro-thermal response in forest fire environment

2020 ◽  
pp. 57-65
Author(s):  
Eusébio Conceiçã ◽  
João Gomes ◽  
Maria Manuela Lúcio ◽  
Jorge Raposo ◽  
Domingos Xavier Viegas ◽  
...  
Keyword(s):  
Forest Fire ◽  
Numerical Study ◽  
Thermal Response ◽  
View Factor ◽  
Tree Model ◽  
Pine Tree ◽  
Surface Temperatures ◽  
Fire Environment ◽  
Fire Front ◽  
Heat Exchanges

This paper refers to a numerical study of the hypo-thermal behaviour of a pine tree in a forest fire environment. The pine tree thermal response numerical model is based on energy balance integral equations for the tree elements and mass balance integral equation for the water in the tree. The simulation performed considers the heat conduction through the tree elements, heat exchanges by convection between the external tree surfaces and the environment, heat exchanges by radiation between the flame and the external tree surfaces and water heat loss by evaporation from the tree to the environment. The virtual three-dimensional tree model has a height of 7.5 m and is constituted by 8863 cylindrical elements representative of its trunks, branches and leaves. The fire front has 10 m long and a 2 m high. The study was conducted taking into account that the pine tree is located 5, 10 or 15 m from the fire front. For these three analyzed distances, the numerical results obtained regarding to the distribution of the view factors, mean radiant temperature and surface temperatures of the pine tree are presented. As main conclusion, it can be stated that the values of the view factor, MRT and surface temperatures of the pine tree decrease with increasing distance from the pine tree in front of fire.

NUMERICAL STUDY FOR THAILAND: MATHEMATICAL MODEL OF PRODUCTION AND LOGISTIC PLANNING FOR SUGARCANES USED IN BIOFUEL PRODUCTION

2013 ◽  
Author(s):  
Pancheewa Benjamasutin ◽  
◽  
Ponthong Rijana ◽  
Phongchayont Srisuwan ◽  
Aussadavut Dumrongsiri
Keyword(s):  
Mathematical Model ◽  
Numerical Study ◽  
Biofuel Production ◽  
Logistic Planning
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