nasa workshop on computational structural mechanics 1987

383
E_ % NASA Conference Publication 1:912 _rt 2 NASA Workshop on Computational Structural Mechanics 1987 Nancy P. Sykes, Editor Analytical Services and Materials, Inc. Hampton, Virginia Proceedings of a workshop sponsored by the National Aeronautics and Space Administration and held at Langley Research Center Hampton, Virginia November 18-20, 1987 ! _D (NASA-CP-IOOIZ-Pt-Z) NASA WORKSHOP ON C_MPUTATIONAL STRUCTURAL MECHANICS 1987, PART 2 (NASA. Lanqley Research Center} CSCL 374 p 20K Hl/39 February 1989 N89-29789 --THRU-- NB9-Z97q8 Unclas 0211957 ASA National Aeronautics and Space Administration

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Page 1: NASA Workshop on Computational Structural Mechanics 1987

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NASA Conference Publication 1:912_rt 2

NASA Workshopon Computational

StructuralMechanics

1987

Nancy P. Sykes, Editor

Analytical Services and Materials, Inc.

Hampton, Virginia

Proceedings of a workshop sponsored by

the National Aeronautics and SpaceAdministration and held at

Langley Research CenterHampton, Virginia

November 18-20, 1987

!

_D

(NASA-CP-IOOIZ-Pt-Z) NASA WORKSHOP ON

C_MPUTATIONAL STRUCTURAL MECHANICS 1987,

PART 2 (NASA. Lanqley Research Center}CSCL

374 p20K

Hl/39

February 1989

N89-29789

--THRU--

NB9-Z97q8

Unclas

0211957

ASANational Aeronautics andSpace Administration

Page 2: NASA Workshop on Computational Structural Mechanics 1987

Preface

This document contains the proceedings of the NASA Workshop on ComputationalStructural Mechanics, held at NASA Langley Research Center, November 18-20, 1987.The workshop was sponsored jointly by NASA Langley Research Center and NASALewis Research Center.

The purpose of the workshop was to allow participants in Langley's and Lewis'Computational Structural Mechanics (CSM) research programs to meet and toshare research objectives and accomplishments. The intent was to encourage acooperative Langley/Lewis CSM program in which Lewis concentrates on enginestructures applications, Langley concentrates on airframe and space structuresapplications, and all participants share technology of mutual interest.

The workshop was organized into the following three sessions:

I Concurrent Processing Methods and Applications

II Advanced Methods & Testbed/Simulator Development

III Computational Dynamics

Session I dealt with parallel processing methods and languages, new computerhardware, and software architecture to exploit parallel computers.

Session II dealt with the Langley CSM Testbed, the Lewis Engine Structures

Computational Simulator, and Structural Analysis Technology involving finiteelements, boundary elements, and probabilistic approaches.

Session III dealt with advanced methods for structural dynamics.

The use of trade names or names of manufacturers in this publication does notconstitute an official endorsement of such products or manufacturers, either

expressed or implied, by the National Aeronautics and Space Administration.

W. Jefferson Stroud

Page 3: NASA Workshop on Computational Structural Mechanics 1987

With the exception of a few adjustments madeprimarily for the purpose of uniformity, all pa-pers have been published as received.

--Editor

ii

Page 4: NASA Workshop on Computational Structural Mechanics 1987

CONTENTS

PREFACE ............................................................................................. i

W. Jefferson Stroud, LaRC

Part 1'

OVERVIEW OF THE NASA PROGRAMIN COMPUTATIONAL STRUCTURAL MECHANICS ........................................... 1

Murray Hirschbein, NASA Headquarters

SESSION I - CONCURRENT PROCESSING METHODS AND APPLICATIONS

CSM PARALLEL STRUCTURAL METHODS RESEARCH ..................................... 25

Olaf O. Storaasli, LaRC

COMPUTATIONAL STRUCTURAL METHODS AT NASA LEWIS ................. _.......... 61L. J. Kiraly, LeRC

TRANSPUTER FINITE ELEMENT SOLVER ................................................. ... 75

Albert Danial, SPARTA

TRANSPUTER PARALLEL PROCESSING AT NASA LERC ............ . .................... 107

Graham K. Ellis, ICOMP, LeRC

INNOVATIVE ARCHITECTURESFOR DENSE MULTI-MICROPROCESSOR COMPUTERS .................................... 137

Robert E. Larson, Expert-EASE

PARALLEL LINEAR EQUATION SOLVERSFOR FINITE ELEMENT COMPUTATIONS .................................................... 171

James M. Ortega, Gene Poole, Courtenay Vaughan, Andrew Cleary,Brett Averick, U. of Virginia

ALGORITHMS AND SOFTWARE FOR SOLVING FINITE ELEMENT EQUATIONSON SERIAL AND PARALLEL ARCHITECTURES ............................................. 203

Alan George, U. of Tennessee

PARALLEL EIGENVALUE EXTRACTION ..................................................... 239

Fred A. Akl, Ohio U.

PARALLEL ALGORITHMS AND ARCHITECTURES FORCOMPUTATIONAL STRUCTURAL MECHANICS ............................................. 261

Merrell Patrick, Shing Ma, Umesh Mahajan, Duke U.

THE FORCE: A PORTABLE PARALLEL PROGRAMMING LANGUAGESUPPORTING COMPUTATIONAL STRUCTURAL MECHANICS ........................... 273

Harry F. Jordan, Muhammad S. Benten, Juergen Brehm,Aruna Ramanan, U. of Colorado

* Published under separate cover

iii

Page 5: NASA Workshop on Computational Structural Mechanics 1987

METHODS FOR DESIGN AND EVALUATION OF PARALLEL

COMPUTING SYSTEMS (THE PISCES PROJECT) ........................................... 281Terrence W. Pratt, Robert Wise, Mary Jo Haught, U. of Virginia and ICASE, LaRC

MULTIPROCESSOR ARCHITECTURE: SYNTHESIS AND EVALUATION .................. 299

Hilda M. Standley, U. of Toledo

ENVIRONMENTAL CONCEPT FOR ENGINEERING SOFTWAREON MIMD COMPUTERS .......................................................................... 323

L. A. Lopez and K. Valimohamed, U. of Illinois

HIERARCHIAL PARALLEL COMPUTER ARCHITECTUREDEFINED BY COMPUTATIONAL MULTIDISCIPLINARY MECHANICS ................... 355

Joe Padovan, Doug Gute, Keith Johnson, U. of Akron

Part 2

SESSION H - ADVANCED METHODS & TESTBED/SIMULATOR DEVELOPMENT

CSM RESEARCH: TESTBED DEVELOPMENT ................................................ 387Ronnie E. Gillian, LaRC

CSM TESTBED ARCHITECTURE .............................................................. 419

Philip Underwood, Lockheed PARL

COMPUTATIONAL STRUCTURAL MECHANICS _'ENGINE STRUCTURES COMPUTATIONAL SIMULATOR .................................. _459

C. C. Chamis, LeRC

INTERFACING MODULES FOR INTEGRATING /_DISCIPLINE SPECIFIC STRUCTURAL MECHANICS CODES ............................... 487

Ned M. Endres, LeRC

CSM RESEARCH: METHODS AND APPLICATION STUDIES .............................. _._21

Norman F. Knight, Jr., LaRC

GENERIC ELEMENT PROCESSOR (APPLICATION TO NONLINEAR ANALYSIS) ....... 571Gary Stanley, Lockheed PARL

ASSESSMENT OF SPAR ELEMENTS AND FORMULATION OF SOME BASIC 2-D AND gff3-D ELEMENTS FOR USE WITH TESTBED GENERIC ELEMENT PROCESSOR ......... 653

Mohammad A. Aminpour, AS&M, LaRC

DEVELOPMENT AND VERIFICATION OF LOCAL/GLOBAL _ANALYSIS TECHNIQUES FOR LAMINATED COMPOSITES .............................. ._._83

O. Hayden Griffin, Jr., VPI&SU

CONTROL OF THE ERRORS OF DISCRETIZATION __AND IDEALIZATION IN FINITE ELEMENT ANALYSIS ..................................... 733

Barna A. Szab6, Washington U.

iv

Page 6: NASA Workshop on Computational Structural Mechanics 1987

Part 3*

BOUNDARY ELEMENTS FOR STRUCTURAL ANALYSIS ................................... 763

Ray Wilson, P&W

DEVELOPMENT OF AN INTEGRATED BEM FOR IIOTFLUID-STRUCTURE INTERACTION .......................................................... 831

P. K. Banerjee and G. F. Dargush, SUNY-Buffa!o

PROBABILISTIC STRUCTURAL ANALYSIS METItODS FOR SELECT SPACEPROPULSION SYSTEM STRUCTURAL COMPONENTS ..................................... 865

T. A. Cruse, SWRI

PROBABILISTIC FINITE ELEMENTS (PFEM) APPLIEDTO STRUCTURAL DYNAMICS AND FRACTURE MECHANICS ............................. 903

Wing-Kam Liu, Ted Belytschko, A. Mani, G. Besterfield, Northwestern U.

3-D INELASTIC ANALYSES FOR COMPUTATIONAL S'P]_UCTURAL MECHANICS ..... 943

D. A. ttopkins and C. C. Chamis, LeRC

SPECIALTY FUNCTIONS FOR S_:C .UL,_ I_[_'_,7 M [_CI{A NICS PROBLEMS ................ 981

Nesrin Sarigul, Ohio State U.

SESSION III- COMPUTATIONAL DYNAMICS

LARC COMPUTATIONAL STRUCT U '7[AL DYNAMICS OVERV JEW ....................... t 013

J. M. Housner, LaRC

ALGORITHMS AND SOFTWARE FOR. NONLTNEAR STRUCTURAL DYNAMICS ....... 10,13

Ted Belytschko, Noreen D. Gilbertsen, Mark O. Neal, Northwestern U.

CONCURRENT ALGORITHMS FOR TRANSIENT FE ANALYSIS ......................... 1067M. Ortlz, Brown U. and B. Nour-Omid, Lockheed PARL

COMPUTATIONAL METHODS AND SOFTWARE SYSTEMSFOR DYNAMICS AND CONTROL OF LARGE SPACE STRUCTURES .................... 11.05

K. C. Park, C. A. Felippa, Charbel Farhat, J. D. Downer, J. C. Chiou,W. K. Belvin, U. of Colorado

MULTI-GRID FOR STRUCTURES ANALYSIS ................................................ 1133Albert F. Kaseak. LeRC

* Published under sep,t._a!e ,:.vcr

V

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Page 383: NASA Workshop on Computational Structural Mechanics 1987

1. Report No.

NASA CP- i0012, Part 2

4 Title and Subtitle

Report Documentation Page

2. Government Accession No. 3. Recipient's Catalog No.

5, Report Date

NASA Workshop

Mechanics- 1987

7. Author(s)

on Computational Structural

Nancy P. Sykes, Editor

9, Pedorming Organization Name and Address

NASA Langley Research Center

Hampton, VA 23665-5225

12. Sponsoring Agency Name and Address

National Aeronautics and Space

Washington, DC 20546-0001

Administration

February 1989

6. Performing Organization Code

8. Performing Organization Report No,

10. Work Unit No.

505-63-01-10

11. Contract or Grant No.

13. Type of Report and Period Covered

Conference Publication

14. Sponsoring _,gency Code

15. Supplementary Notes

Nancy P. Sykes: Analytical Services and Materials, Inc., Hampton, Virginia.

16 Abstract

This conference publication contains the proceedings of the Workshop on

Computational Structural Mechanics held at NASA Langley Research Center,

November 18-20, 1987. The workshop was sponsored jointly by NASA LangleyResearch Center and NASA Lewis Research Center.

The workshop was organized into the following three sessions:

(1) Concurrent Processing Methods and Applications

(2) Advanced Methods & Testbed/Simulator Development

(3) Computational Dynamics

17Key Words(SuggestedbyAuthor(sll

Parallel Processing

Computational Dynamics

Testbed

Computational Structural Mechanics

19 Security Cla_if (of this report)

Unclassified

NASA FORM 1626 OCT 86

I I['or sale by the National Technical Information Service, Springfield, Virginia 22161-2171

20. Security Classif, (of this page)

Unclassified

18. Distribution Statement

Unclassified - Unlimited

Subject Category 39

21 No. of pages382

Price

A17