Laboratory and Numerical Studies of Internal Gravity Wave Propagation in a Sheared Environment

During the last two decades, internal gravity waves have been recognized as an important feature in atmospheric and oceanic dynamics. In both fluids, internal gravity waves account for much of the variability in observed velocity and density profiles and

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Springer-Verlag Berlin Heidelberg GmbH 1982

G. A. Keramidas C.A. Brebbia Computational Mechanics Centre, Ashurst Lodge, Ashurst, Southampton, Hampshire, S04 2AA

UK

ISBN 978-3-662-11355-4 ISBN 978-3-662-11353-0 (eBook) DOI 10.1007/978-3-662-11353-0

This work is subject

10

copyright. All rights are reserved, whether the whole or part of the material

is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. Under § 54 of the Gennan Copyright Law where copies are made fOr other than private use a tee is payable to

'Verwertungsgesellschafi Wort', Munich.

©Springer-Verlag Berlin Heidelberg 1982 Originally published by Springer-Verlag Berlin Heidelberg New York in 1982 Soticover reprint of the hardcover lst edition 1982 The use of registered names, trademarks, etc. in this publication does nm imply, even in the absence of a specific statement, that such names are exempt from the relevam protective laws and regulations and therefOre free fOr general use.

CONTENTS SESSION 1

KEYNOTE ADDRESS

SESSION 2A

SYSTEM IDENTIFICATION

Damage Identification of Existing Structures

3

Survey on Parameter Estllnation Within System Identification Using a Priori Knowledge of System Analysis

17

Modal and Damage Analysis of Elastic Structures Frequency Separation by Non-Linear Filter

28

System Identification of Structural Dynamic Parameters from Modal Data

40

James T.P. Yao, Purdue University, W. Lafayette, U.S.A

Natke, H.G., Curt-Risch-Institut, Universitat Hannover, Germany

Walter Wedig, University Karlsruhe

Jean-Guy Beliveau, University de Sherbrooke, Canada Samir Chater, Lavalin Inc., Quebec, Canada SESSION 2B

WATER RESOURCES

Solution of an Inverse Problem in Groundwater Flow Using Uncertain DataD. H

53

Pressure Field Data Acquisition on a Physical Well Model Using a Minicomputer

64

A Two Dimensional Numerical Model for Mising in Natural Rivers

76

D.H. Tang, Princeton University, U.S.A. G.F. Pinder, Princeton University, U.S.A

Jerry S. Martin, Bureau of Reclamation

Y.S. Halabi, H.T. Shen, T.S. Papatheodorou and W.L. Briggs, Clarkson College of Technology, U.S.A.

SESSION 3A

DATA IDENTIFICATION

Acquisition and Processing of Experimental Data by a Mini Conputer in a Hydraulic Laboratory Cedo Maksimovic, Institute of Hydraulic Engineering, Yugoslavia

91

Computer-Based Measurements of Incipient Wave Breaking S.E. Ramberg and C.L. Bartholomew Naval Research Laboratory, Washington D.C., U.S.A

102

Acquisition and Display of Data From Large Arrays of Sensors Johannes Buhler, Institut fur Hydromechanik und Wasserwirtschaft, Switzerland

116

SESSION 3B

ATMOSPHERIC FLUID DYNAMICS

Designing Experiments for Investigating Collmnar Vortices John T. Snow, Purdue University, U.S.A.

129

Comparative Studies of Tornado-Like Vortices David R. Smith, Purdue University, U.S.A.

141

N'Ll!IErical calculation of the Regime Diagram for the Atmospheric General Circulation Experiment T. Miller and R