By Bruno A. Boley (auth.), Prof. D. E. Beskos, Prof. F. Ziegler (eds.)

On December 2-5, 1991, a Symposium on Thermal Stresses, Dynamics and balance honoring Professor Bruno A. Boley at the social gathering of his sixty fifth birthday was once held in Atlanta, Georgia in the course of the wintry weather Annual assembly of the yankee Society of Mechanical Engineers. The papers offered throughout the Symposium by means of a few of Professor Boley's former scholars and co-workers disguise these components of utilized mechanics the place such a lot of his contributions were remodeled the years. those papers were written in tribute to Professor Boley's unique medical profession and out of actual affection and admire for him. the current quantity contains these Symposium papers that belong to the parts of Dynamics and balance and represent contemporary advances within the box. a unique factor of the magazine of Thermal Stresses has been reserved for ebook of the Symposium papers on Thermal Stresses, less than the editorship of Professor R. B. Hetnarski. the current quantity starts off with a biographical caricature and bibliography of Professor Boley, in addition to an inventory of his doctoral scholars. 13 papers on dynamics and balance stick with. the 1st 4 papers care for wave propagation and vibration experiences in solids and constructions. the following papers learn wave propagation in fluids, whereas the 7th paper is anxious with the dynamic reaction of random media. papers facing structural vibrations showing instability and one facing dynamic buckling delamination are awarded subsequent. The final 3 papers are involved in instability in solids and structures.

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ASCE 109/1,73-89 (1983). : Dynamic response of multiply supported secondary systems. J. Eng. Mech. 111/1, 20-41 (1985). : Resonance characteristics of connected subsystems: Theory and simple configurations. J. Sound Vibr. 146/3, 407-421 (1991 a). : Resonance characteristics of connected subsystems: General configurations. J. Sound Vibr. 146/3,423-437 (1991 b). : On the modeling of flexible multi-body systems by the Rayleigh-Ritz method. Proceedings, AIAA dynamics specialist conference, Long Beach, CA, April 5-6, pp.

E. Beskos and I. Vgenopoulou In the above, a receives the values 1 (for fissures) and 2 (for pores) and does not imply summation when it is repeated, the coefficients {J. express the deformability ofthe solid as this affects the flow in the fissures (a= 1) and the pores (a= 2), the coefficients y. measure the compressibility of the fissures (a = 1) and the pores (a = 2), the coefficient 1< measures the transfer of fluid from the pores to the fissures and the seepage force factors v. and the relative specific discharges Q.

Thus for i1 = Q = 0 and after eliminating Q and applying Laplace transform with respect to time, Eqs. ,+~ a)= 0. (38) The above equation is solved numerically by finite differences and the transformed solution is inverted numerically to produce the time domain response in exactly the same way as in the dynamic case. The present method gives almost identical results with the analytical-numerical method of Vgenopoulou and Beskos [4] for the soil borehole problem under quasi-static conditions. In addition to the suddenly applied pressure case discussed above, the case of a harmonically varying with time pressure p 0 cos wt inside the borehole can also be treated by the method just described under both dynamic and quasi-static conditions.

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