Dynamic Response of Beams and Plates to Rapid Heating

1957 ◽  
Vol 24 (3) ◽  
pp. 413-416
Author(s):  
B. A. Boley ◽  
A. D. Barber
Keyword(s):  
Dynamic Response ◽  
Basic Parameter ◽  
Approximate Formula ◽  
Rapid Heating ◽  
Thin Plates ◽  
Rectangular Plates ◽  
Rapid Estimation ◽  
Thermally Induced ◽  
Thermally Induced Vibrations

Abstract The thermally induced vibrations of rectangular plates and beams under some typical heat applications are studied. The basic parameter of the problem, B, is found to depend on the natural frequency of the structure and on a characteristic thermal time. Curves are presented of the variation with B of the ratio of the deflections calculated including and neglecting the effect of inertia. The role of inertia is found to be important for rapidly applied heat inputs and for thin plates. An approximate formula for its rapid estimation is also presented.

Approximate Analyses of Thermally Induced Vibrations of Beams and Plates

1972 ◽  
Vol 39 (1) ◽  
pp. 212-216 ◽  
Author(s):  
B. A. Boley
Keyword(s):  
General Formula ◽  
Approximate Formula ◽  
Exact Results ◽  
Static Deflection ◽  
Thermally Induced ◽  
Thermally Induced Vibrations ◽  
Good Agreement

A simple general formula is derived for the ratio of the maximum dynamic to static deflection of heated beams and plates. The formula, although approximate, is in good agreement with the exact results. The effects of damping and of axial or in-plane loads are then considered, and the pertinent generalizations of the previous approximate formula are derived.

Thermally induced vibrations of a self-shadowed split-blanket solar array

1995 ◽  
Vol 32 (2) ◽  
pp. 302-311 ◽  
Author(s):  
Earl A. Thornton ◽  
Gregory P. Chini ◽  
David W. Gulik
Keyword(s):  
Solar Array ◽  
Thermally Induced ◽  
Thermally Induced Vibrations

Thermally Induced Electron Transfer in a CsCoFe Prussian Blue Derivative: The Specific Role of the Alkali-Metal Ion

2004 ◽  
Vol 116 (28) ◽  
pp. 3814-3817 ◽  
Author(s):  
Anne Bleuzen ◽  
Virginie Escax ◽  
Alban Ferrier ◽  
Françoise Villain ◽  
Michel Verdaguer ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Alkali Metal ◽  
Prussian Blue ◽  
Metal Ion ◽  
Specific Role ◽  
Alkali Metal Ion ◽  
Thermally Induced

Sensing and Control of Thermally Induced Vibrations of Stationary Blades Using Piezoelectric Materials

2017 ◽  
Vol 43 (3) ◽  
pp. 1301-1311 ◽  
Author(s):  
K. S. Al-Athel ◽  
H. M. Al-Qahtani ◽  
M. Sunar ◽  
L. Malgaca ◽  
A. Omar
Keyword(s):  
Piezoelectric Materials ◽  
Thermally Induced ◽  
Thermally Induced Vibrations ◽  
And Control

scholarly journals Capillary Polypropylene Membranes for Membrane Distillation

Fibers ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Marek Gryta
Keyword(s):  
Continuous Process ◽  
Negative Influence ◽  
Membrane Distillation ◽  
Water Desalination ◽  
Porous Membranes ◽  
Surface Porosity ◽  
Permeate Flux ◽  
Thermally Induced

Only nonwetted porous membranes can be used in membrane distillation. The possibility of application in this process the capillary polypropylene membranes manufactured by thermally-induced phase separation was studied. The performance of a few types of membranes available commercially was presented. The resistance of the membranes to wetting was tested in the continuous process of water desalination. These studies were carried out for 1000 h without module cleaning. The presence of scaling layer on the membranes surface was confirmed by Scanning Electron Microscope observations. Both the permeate flux and distillate conductivity were almost not varied after the studied period of time, what indicates that the used membranes maintained their nonwettability, and the negative influence of scaling was limited. The role of surface porosity on the pore wetting and influence of membrane wettability on the quality of the distillate obtained were discussed.

Hydroelastic Vibration of Rectangular Plates

1996 ◽  
Vol 63 (1) ◽  
pp. 110-115 ◽  
Author(s):  
Moon K. Kwak
Keyword(s):  
Boundary Conditions ◽  
Approximate Formula ◽  
Natural Frequencies ◽  
Mass Matrix ◽  
Ritz Method ◽  
Plate Boundary ◽  
Rigid Wall ◽  
Mode Shapes ◽  
Rectangular Plates ◽  
Virtual Mass

This paper is concerned with the virtual mass effect on the natural frequencies and mode shapes of rectangular plates due to the presence of the water on one side of the plate. The approximate formula, which mainly depends on the so-called nondimensionalized added virtual mass incremental factor, can be used to estimate natural frequencies in water from natural frequencies in vacuo. However, the approximate formula is valid only when the wet mode shapes are almost the same as the one in vacuo. Moreover, the nondimensionalized added virtual mass incremental factor is in general a function of geometry, material properties of the plate and mostly boundary conditions of the plate and water domain. In this paper, the added virtual mass incremental factors for rectangular plates are obtained using the Rayleigh-Ritz method combined with the Green function method. Two cases of interfacing boundary conditions, which are free-surface and rigid-wall conditions, and two cases of plate boundary conditions, simply supported and clamped cases, are considered in this paper. It is found that the theoretical results match the experimental results. To investigate the validity of the approximate formula, the exact natural frequencies and mode shapes in water are calculated by means of the virtual added mass matrix. It is found that the approximate formula predicts lower natural frequencies in water with a very good accuracy.

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