摘要:

AbstractIn the paper the boundary integral equation method for solving the problem of a plate resting on a two‐parameter foundation is presented. Three boundary value problems are considered, and three cases are to be distinguished as regards a characteristic parameter of the foundation. The boundary integral equation solution for a clamped circular plate under a concentrated load is compared to the analytical on

ISSN:0044-2267    

DOI:10.1002/zamm.19840640302

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractIm Teil I der gleichlautenden Arbeit wurden Grundlagen zur Dualität bei Steuerungsproblemen bereitgestellt und auf zwei geometrische Optimierungsprobleme angewandt: Die Bestimmung ebener konvexer Bereiche größten bzw. kleinsten Umfangs bei vorgegebener Dicke Δ und vorgeschriebenem Durchmesser D. Im vorliegenden Teil II schließt sich unter gleichen Nebenbedingungen die Behandlung zweier weiterer Beispiele an: Das Problem des ebenen konvexen Bereichs größten Flächeninhalts und des konvexen Körpers größter

ISSN:0044-2267    

DOI:10.1002/zamm.19840640303

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractBy employing the theory of propagation of columnar disturbance, general criteria for selective withdrawal in sedimentation basins are derived. The stratified fluid is assumed to be two‐layered with different density distribution in each layer. The effects of a free surface are also included in the analysis, but the viscosity is neglected as in most other studies of stratified flow behavior. The criteria for different density profiles are established in terms of the densimetric Froude number. If the actual densimetric Froude number is smaller than its critical value, selective withdrawal will occur. Comparison of the theoretical results with the experimental data obtained by Bohan and Grace [1973]indicate an excellent agreement as long as the thickness of the bottom layer, s, is small compared to that of the top layer. Results obtained by assuming rigid upper boundary instead of free surface are also compared with the results derived in this paper. For weak stratification and small values of s they show excellent agreement. As s increases for strong stratification, the effect of free surface will become increasingly pronounce

ISSN:0044-2267    

DOI:10.1002/zamm.19840640304

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractThe purpose of this paper is to complete the formulation of plane thermoelastic problem in a multiply‐connected region taking into account the temperature dependencies of material properties in terms of Airy's stress function by deriving the conditions for the single valuedness of the rotation and displacements, i.e., modified Michell's conditions, and to present a method for analyzing the system of the resulting fundamental equations numerically by the use of finite difference metho

ISSN:0044-2267    

DOI:10.1002/zamm.19840640305

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractSome difference schemes for the cited (stationary) equation are considered and their accuracy is estimated by known quantities only. The results are useful for any Peclét number and imply uniform convergence (with respect to a small diffusion coefficient) up to forth order in h in the linear case and of first order in the mildly nonlinear case

ISSN:0044-2267    

DOI:10.1002/zamm.19840640306

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractWe consider the linear equations modelling the dynamic behavior of vibrating beams and thin plates. We develop the basic equations for the sensitivity function indicating the dynamic structural response to changes in design. Specifically, the properties of the sensitivity function are developed in detail for the vibrating beam equation. We conclude that the knowledge of an elementary solution of the beam equation, and of the sensitivity function for the elementary solution can be used to determine the sensitivity function for a class of admissible loads applied to the beam.

ISSN:0044-2267    

DOI:10.1002/zamm.19840640307

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19840640308

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19840640309

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19840640310

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19840640312

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY