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 get together of his sixty fifth birthday used to be held in Atlanta, Georgia through the iciness Annual assembly of the yank Society of Mechanical Engineers. The papers awarded in the course of the Symposium through 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 individual clinical profession and out of actual affection and appreciate for him. the current quantity involves these Symposium papers that belong to the parts of Dynamics and balance and represent fresh advances within the box. a different factor of the magazine of Thermal Stresses has been reserved for e-book of the Symposium papers on Thermal Stresses, less than the editorship of Professor R. B. Hetnarski. the current quantity starts off with a biographical comic strip and bibliography of Professor Boley, in addition to an inventory of his doctoral scholars. 13 papers on dynamics and balance keep on with. the 1st 4 papers care for wave propagation and vibration stories in solids and buildings. the following papers research wave propagation in fluids, whereas the 7th paper is anxious with the dynamic reaction of random media. papers facing structural vibrations displaying instability and one facing dynamic buckling delamination are provided subsequent. The final 3 papers are interested in instability in solids and structures.

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Z(h, s) = 0. -rJ 0 j(}, + 2p) s, (26) The time domain response of the soil column is finally obtained by a numerical inversion of the Laplace transformed solution (25), which employs the algorithm of Durbin [39]. This algorithm has been found in Narayanan and Beskos [40] to be the most accurate one for dynamic problems. The present method gives almost identical results with the analytical method of Bowen and Lockett [12] as it is explained in [4]. However, the present method is simpler and more general than the one in [12].

0 BO 60 100 Fig. 5. 0 t/t 0 -3 (x10) Fig. 6. Solid displacement history for fully saturated soil borehole under quasi-static and dynamic conditions subjected to a harmonic pressure 48 D. E. Beskos and I. Vgenopoulou w = 50 sec -l, then the dynamic response is higher than the quasi-static one as Fig. 9 clearly indicates. The factor t 0 is now computed with K = K 2 and c;P = (2 + 2p,)j{j8 • Figures 10 and 11 depict the solid displacement and fissure pressure versus distance for various times t* = tjt 0 for the rock borehole problem under dynamic and quasi-static conditions, producing almost identical results.

Pp. 1-127. New York: Academic Press 1976. [3] Corapcioglu, M. : Wave propagation in porous media - a review. , Corapcioglu, M. ), pp. 373-469. Dordrecht: Kluwer Academic Publishers 1991. , Beskos, D. : Dynamic poroelastic soil column and borehole problem analysis. Soil Dynamics and Earthquake Engineering (to appear). , Beskos, D. : Dynamics of saturated rocks. IV: column and borehole problems. J. Eng. , ASCE (to appear). , Beskos, D. : Dynamic behavior of saturated poroviscoelastic media. Acta Mechanica (to appear).

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