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Dynamic Analysis Of Non-Linear Structures By The Method Of Statistical Quadratization

by M.G. Donley e Pol Spanos

118,59€ + 10% CARD

 This text deals with a new technique for the dynamic analysis of nonlinear structures, which allows engineers to deal with complex nonlinear problems in a systematic manner. It is especially relevant in dealing with offshore structures which are exposed to nonlinear forces due to waves.
ENGLISH

Air Traffic And The Environment - Background, Tendencies And Potential Global Atmospheric Effects - Proceedings Of A Dlr International Colloquium, Bonn, Germany, November 15/16, 1990

118,59€ + 10% CARD

 This volume contains ten papers on air traffic and the environment, prepared by invited experts for a seminar organized by the German Aerospace Research Establishment. Topics discussed include the climatic effect of contrails and the pollutant emissions of commercial aircraft.
ENGLISH

Coupled Boundary And Finite Element Methods For The Solution Of The Dynamic Fluid-Structure Interaction Problem

by David T. Wilton, Paul J. Harris e Siamak Amini

118,59€ + 10% CARD

 This text considers computational techniques for the analysis of dynamic fluid-structure interaction between a finite elastic structure and the associated acoustic field in the surrounding medium.
ENGLISH

Rock Anisotropy And The Theory Of Stress Measurements

by Bernard Amadei

118,59€ + 10% CARD

 Any undisturbed rock mass is subject to natural stresses inclu- ding gravitational stresses due to the mass of the overburden and possibly tectonic stresses due to the straining of the earth's crust and remanent stresses due to past tectonism.
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Boundary Element Method In Geomechanics

by W.S. Venturini

118,59€ + 10% CARD

 Realistic solutions in geomechanical analysis must be provided by considering that material properties vary from point to point, in addition to other significant features such as non-homogeneous media, in situ stress condition, type of loading, time effects and discontinuities.
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Collocation Techniques For Modeling Compositional Flows In Oil Reservoirs

by Myron B. Iii. Allen

59,61€ + 10% CARD

 This investigation is an outgrowth of my doctoral dissertation at Princeton University. I believe that finite-element collocation holds promise as a numer- ical scheme for modeling complicated flows in porous media.
ENGLISH

Boundary Integral Equation Analyses Of Singular, Potential, And Biharmonic Problems

by D. B. Ingham e M. A. Kelmanson

118,59€ + 10% CARD

 Harmonic and biharmonic boundary value problems (BVP) arising in physical situations in fluid mechanics are, in general, intractable by analytic techniques.
ENGLISH

Multiphase Migration Of Organic Compounds In A Porous Medium - A Mathematical Model

by Linda M. Abriola

59,61€ + 10% CARD

 It accounts for approximately 96% of all fresh water in the United States and supplies more than 50% of the population with potable water. Increased production of chemicals implies the increased risk of accidental spills or leakage to the soil, and indeed, the literature abounds with contamination case histories.
ENGLISH

Complex Variable Boundary Element Method

by T. V. Hromadka

118,59€ + 10% CARD

 The Complex Variable Boundary Element Method or CVBEM is a generalization of the Cauchy integral formula into a boundary integral equation method or BIEM.
ENGLISH

Vibrations Of Engineering Structures

by C.A. Brebbia, G.B. Warburton, H. Tottenham, J.M. Wilson e R.R. Wilson

118,59€ + 10% CARD

 The authors start from basic principles to end up with the latest random vibration applications. Southampton 1984 CONTENTS Page Foreword Chapter 1 Introduction to Vibration 1. Dynamic Interaction Problems 20 Chapter 2 Free Vibration, Resonance and Damping l. Damped Free Vibration 34 11. Damped Transient Vibration 43 15.
ENGLISH

Water Quality Management - A Review Of The Development And Application Of Mathematical Models

by M.B. Beck

118,59€ + 10% CARD

 During 1978-1982 the International Institute for Applied Systems Analysis (IIASA) was responsible for a research project on Environmental Quality Control and Management. ) (1983), Eutrophication of Shallow Lakes: Model- ing and Management (The Lake Balaton Case Study) (IIASA Collaborative Proceedings CP-83-S3), and in K.
ENGLISH

Nonlinear Dynamics Of Transcritical Flows - Proceedings Of A Dfvlr International Colloquium, Bonn, Germany, March 1984

118,59€ + 10% CARD

 The German Aerospace Research Establishment (DFVLR) has initiated a new series of seminars concerning fundamental problems in applied engineering sciences.
ENGLISH

Free Piston Stirling Engines

by Graham Walker e J.R. Senft

232,54€ + 10% CARD

 It also covers work-consuming machines used as refrigerating systems and heat pumps abstracting heat from a low temperature source and delivering this plus the heat equivalent of the work consumed to a higher tem- perature.
ENGLISH

Boundary Integral Equatio Method In Axisymmetric Stress Analysis Problems

by Adib A. Bakr

118,59€ + 10% CARD

 The Boundary Integral Equation (BIE) or the Boundary Element Method is now well established as an efficient and accurate numerical technique for engineering problems. The book starts with axisymmetric potential problems and extends the formulation to elasticity, thermoelasticity, centrifugal and fracture mechanics problems.
ENGLISH

Shallow Water Wave Equations: Formulation, Analysis And Application

by Ingemar Kinnmark

118,59€ + 10% CARD

 1. 1 AREAS OF APPLICATION FOR THE SHALLOW WATER EQUATIONS The shallow water equations describe conservation of mass and mo mentum in a fluid. They may be expressed in the primitive equation form Continuity Equation _ a, + V. (Hv) = 0 L(l;,v;h) at (1. 1) Non-Conservative Momentum Equations a M("vjt,f,g,h,A) = at(v) + (v. V)v + tv - fkxv + gV, - AIH = 0 (1. 2) 2 where is elevation above a datum (L) ~ h is bathymetry (L) H = h + C is total fluid depth (L) v is vertically averaged fluid velocity in eastward direction (x) and northward direction (y) (LIT) t is the non-linear friction coefficient (liT) f is the Coriolis parameter (liT) is acceleration due to gravity (L/T2) g A is atmospheric (wind) forcing in eastward direction (x) and northward direction (y) (L2/T2) v is the gradient operator (IlL) k is a unit vector in the vertical direction (1) x is positive eastward (L) is positive northward (L) Y t is time (T) These Non-Conservative Momentum Equations may be compared to the Conservative Momentum Equations (2. 4). The latter originate directly from a vertical integration of a momentum balance over a fluid ele ment. The former are obtained indirectly, through subtraction of the continuity equation from the latter. Equations (1. 1) and (1. 2) are valid under the following assumptions: 1. The fluid is well-mixed vertically with a hydrostatic pressure gradient. 2. The density of the fluid is constant.
ENGLISH

Viscoelasticity - Basic Theory And Applications To Concrete Structures

by Guillermo J. Creus

118,59€ + 10% CARD

 If we are interested in finite elements applications we should look at Chapter IV and then go direct- ly to Chapter VII. Chapter V re- views the viscoelastic behavior of concrete and Chapter VIII studies the problem of creep buckling.
ENGLISH

Angular Distribution Analysis In Acoustics

by Christopher L. Morfey e Stephen M. Baxter

118,59€ + 10% CARD

 The purpose of this book is to j.ir€''~ 0l''l\'' a new technique for the experimental investigation of the free wave model sound field of acoustics. The technique is based on the use of spherical harmonic functions of angle. Acousticians frequently encounter random sound fields whose properties may be closely modelled by use of the "free wave" field. This model field is defined by two basic statistical properties: stationarity in time, and homogeneity in space. Stationarity means that any single order statistic measured by a microphone in the field will be independent of the time at which the recording is taken, while homogeneity means that the measurement will also be independent of the mic- phone''s position in the field. Furthermore, second order statistics obtained from the measurements of two microphones will depend only on the time lapse between the two recordings, and the relative spatial separation of the micro phones, and not on the microphones'' absolute positions in space and time. The free wave field may also (equivalently) be pictured as a collection of plane sound waves which approach an observation position from all angles. These are the "free waves" of the title, with no correlation between waves at different angles and frequencies, although there may exist an angle-dependant plane wave density function. This is a measure of the density of sound energy arriving from different angles. The free wave field has proved to be a simple but remarkably powerful model.
ENGLISH

Numerical Simulation Of Fluid Flow And Heat/Mass Transfer Processes

171,59€ + 10% CARD

 Computational fluid flow is not an easy subject. Not only is the mathematical representation of physico-chemical hydrodynamics complex, but the accurate numerical solution of the resulting equations has challenged many numerate scientists and engineers over the past two decades. The modelling of physical phenomena and testing of new numerical schemes has been aided in the last 10 years or so by a number of basic fluid flow programs (MAC, TEACH, 2-E-FIX, GENMIX, etc). However, in 1981 a program (perhaps more precisely, a software product) called PHOENICS was released that was then (and still remains) arguably, the most powerful computational tool in the whole area of endeavour surrounding fluid dynamics. The aim of PHOENICS is to provide a framework for the modelling of complex processes involving fluid flow, heat transfer and chemical reactions. PHOENICS has now been is use for four years by a wide range of users across the world. It was thus perceived as useful to provide a forum for PHOENICS users to share their experiences in trying to address a wide range of problems. So it was that the First International PHOENICS Users Conference was conceived and planned for September 1985. The location, at the Dartford Campus of Thames Polytechnic, in the event, proved to be an ideal site, encouraging substantial interaction between the participants.
ENGLISH

Finite Rotations In Structural Mechanics - Proceedings Of The Euromech Colloquium 197, Jablonna, Poland, 1985

59,61€ + 10% CARD

 The deformation near a material particle of the classical continuum is produced by successive superposition of a rigid-body translation, a pure stretch along principal directions of strain and a rigid-body ro- tation of those directions.
ENGLISH

Finite Element Analysis Of Hyperbolic Cooling Towers

118,59€ + 10% CARD

 The analysis of thin shells of revolution in general has always occupied an important place in the theory of structures, and recently the problem of hyperbolic cooling towers has attracted many investigators due to the wide use of such shells in industry. Until the early 1960''s these towers were of moderate size, probably not exceeding 76m (250ft) height. In this range, the structural safety and stability were not of primary concern because, the minimum wall thickness and reinforcement were sufficient to provide the required safety. It was not necessary to use very rigorous methods to analyse the problem. The analysis involved the following assumptions, i) flexural stresses were ignored (membrane tneory), ii) The geometry of the shell was assumed to be perfect and to be idealised as a set of straight sided conical frusta, and iii) The boundary conditions at the base were taken to be fixed or continuously hinged with full tangential restraint.
ENGLISH

Reliability Of Randomly Excited Hysteretic Structures

by B.F.Jr. Spencer

118,59€ + 10% CARD

 A. GENERAL REMARKS During the last century, probabilistic methods for design and analysis of engineering systems have assumed a prominent place as an engineering tool. No longer do engineers naively believe that all problems can be analyzed with deterministic methods; but rather, it has been recognized that, due to unc- tainties in the model and the excitation, it may only be possible to describe the state of a system in terms of some random measure. Thus, with the need to address safety and design issues adequately and simultaneously to minimize the cost of a system, much attention has been given to the development of probabilistic criteria which can be applied in a systematic manner [l]t. These techniques allow for uncertainties in the parameters of the model as well as for uncertainties in both the static and dynamic loadings to be considered and therefore give a better measure of the reliability of a system. Widespread application of probabilistic methods can be found in disciplines ranging from civil, mechanical and electrical engineering to biology, economics and political science.
ENGLISH

Fatigue Behaviour Of Offshore Structures

by Ashok Gupta e Ramesh P. Singh

118,59€ + 10% CARD

 The offshore structures are usually built in the form of welded tubular structures. The variable loads due to the ocean waves cause cyclic stress variation in the structural members and the accumu- lated effect of these stresses results in the fatigue failure.
ENGLISH

Supercomputers And Fluid Dynamics - Proceedings Of The First Nobeyama Workshop September 3-6, 1985

118,59€ + 10% CARD

 In the past several years, it has become apparent that computing will soon achieve a status within science and engineering to the classical scientific methods of laboratory experiment and theoretical analysis. The foremost tools of state-of-the-art computing applications are supercomputers, which are simply the fastest and biggest computers available at any given time. Supercomputers and supercomputing go hand-in-hand in pacing the development of scientific and engineering applications of computing. Experience has shown that supercomputers improve in speed and capability by roughly a factor 1000 every 20 years. Supercomputers today include the Cray XMP and Cray-2, manufactured by Cray Research, Inc., the Cyber 205, manufactured by Control Data Corporation, the Fujitsu VP, manufactured by Fujitsu, Ltd., the Hitachi SA-810/20, manufactured by Hitachi, Ltd., and the NEC SX, manufactured by NEC, Inc. The fastest of these computers are nearly three orders-of-magnitude faster than the fastest computers available in the mid-1960s, like the Control Data CDC 6600. While the world-wide market for supercomputers today is only about 50 units per year, it is expected to grow rapidly over the next several years to about 200 units per year.
ENGLISH

Shell And Spatial Structures: Computational Aspects - Proceedings Of The International Symposium July 1986, Leuven, Belgium

118,59€ + 10% CARD

 In recent years powerful engineering workstations for a reasonable price become a valuable tool for the design of complicated constructions such as shell and spatial structures. This availability causes an increasing use of advanced numerical techniques for the static and dynamic analysis of these structures, also in the non-linear range. The I.A.S.S. Working Group nO 13 concerned with "Numerical Methods in Shell and Spatial Structures" and the Department of Civil Engineering of the Katholieke Universiteit Leuven have taken the initiative to organise an International Symposium, providing a forum for discussion and exchange of views between researchers, specialists in numerical analysis on one hand and designers, practising engineer ings on the other hand. These Proceedings contain the papers presented at the Symposium, held in Leuven, July 14-16 1986. The papers are organised in five sections 1. Shell structures 2. Spatial structures 3. Dynamic analysis 4. Non-linear analysis 5. Presentation and interpretation of results The papers covering more than one domain are classified following the main subject. We hope that researchers as well as practising engineers will find a lot of useful information in the book.
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