diana relnot

DIANAFinite Element Analysis

User’s Manual

Release Notes

Release 9.2

TNO DIANA BV

February 12, 2007

ii

DIANA – Finite Element AnalysisUser’s Manual release 9.2Release Notes

Edited by: Max A. N. Hendriks and Berent J. B. M. Wolters

Published by:TNO DIANA bvP.O. Box 49, 2600 AA Delft, The Netherlands.

Phone: +31 15 27 63 250Fax: +31 15 27 63 019E-mail: [email protected] page: www.tnodiana.com

Trademarks.Diana is a registered trademark of TNO DIANA bv. FemGV, FemGen and FemVieware trademarks of Femsys Ltd. Windows is a registered trademark of Microsoft Cor-poration. PostScript, Acrobat and Acrobat Reader are registered trademarks ofAdobe Systems, Inc. AutoCAD is a registered trademark of Autodesk Inc. DXF is atrademark of Autodesk Inc. The X Window System is a trademark of M.I.T. unix isa registered trademark of UNIX Systems Laboratories, Inc.

Draft edition, February 12, 2007.Copyright © 2007 by TNO DIANA bv, all rights reserved. No part of this publicationmay be reproduced in any form by print, photoprint, microfilm or any other means,without the prior written permission of the publisher.The information in this document is subjected to change without notice and shouldnot be construed as a commitment by TNO DIANA bv. TNO DIANA bv assumesno responsibility for any errors that may appear in this document.The Diana system is the sole property of TNO DIANA bv. Software materials madeavailable are solely for use at a single site; they are not to be distributed to otherswithout prior written permission of TNO DIANA bv.

This document was prepared with the LATEX Document Preparation System.

February 12, 2007 – Draft ed. Diana-9.2 User’s Manual – Release Notes

Contents

Preface v

1 Analysis Capabilities 11.1 Input Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1.1 Named Data Sets . . . . . . . . . . . . . . . . . . . . . 11.2 Element Library . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2.1 T15SH Element Area Integration Scheme . . . . . . . . 11.2.2 L4HT Cooling Pipe Start Node Number . . . . . . . . . 11.2.3 Fluid–Structure Interface Pressure Support . . . . . . . 2

1.3 Material Library . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.3.1 Pressure Loading in Time and Space . . . . . . . . . . . 21.3.2 Jardine Elastoplasticity . . . . . . . . . . . . . . . . . . 21.3.3 Smeared Crack Model Ambient Dependency . . . . . . 21.3.4 Total Strain Crack Model Ambient Dependency . . . . 21.3.5 Total Strain Crack Model Tension Softening . . . . . . 31.3.6 Monti–Nuti Plasticity . . . . . . . . . . . . . . . . . . . 31.3.7 Time Dependent Diffusion Coefficient of Concrete . . . 31.3.8 Convection and Radiation in Potential Flow . . . . . . 31.3.9 Modified Maekawa Concrete Model . . . . . . . . . . . 31.3.10 Hardin–Drnevich & Ramberg–Osgood Soil Models . . . 41.3.11 Position Dependency of Material Properties . . . . . . . 4

1.4 Analysis Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 41.4.1 Automatic Tying of Loose Elements . . . . . . . . . . . 41.4.2 Spectral Response Analysis . . . . . . . . . . . . . . . . 41.4.3 Automatic Load and Time Increments . . . . . . . . . . 41.4.4 Stability Analysis of Reinforced Structures . . . . . . . 41.4.5 Direct Solution Procedure . . . . . . . . . . . . . . . . . 51.4.6 Eigenvalue Analysis Solver . . . . . . . . . . . . . . . . 51.4.7 Output for FX+ . . . . . . . . . . . . . . . . . . . . . . 51.4.8 User-supplied Subroutines . . . . . . . . . . . . . . . . . 5

1.5 Application Modules . . . . . . . . . . . . . . . . . . . . . . . . . 51.5.1 Input of FX+ and Nastran . . . . . . . . . . . . . . . . 5

Diana-9.2 User’s Manual – Release Notes February 12, 2007 – Draft ed.

iv CONTENTS

2 Pre- and Postprocessing 72.1 The Mesh Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.2 Analysis Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3 FX+ for DIANA . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 User’s Manual 93.1 Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1.1 Analysis Examples . . . . . . . . . . . . . . . . . . . . . 93.1.2 Concrete and Masonry Analysis . . . . . . . . . . . . . 93.1.3 FX+ for DIANA . . . . . . . . . . . . . . . . . . . . . . 93.1.4 Geotechnical Analysis . . . . . . . . . . . . . . . . . . . 10

3.2 Distribution Formats . . . . . . . . . . . . . . . . . . . . . . . . 103.2.1 HTML for On-line Access . . . . . . . . . . . . . . . . . 103.2.2 Portable Document Format . . . . . . . . . . . . . . . . 103.2.3 Books . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.2.4 PostScript . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3 Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Incompatibilities 134.1 Batch Commands . . . . . . . . . . . . . . . . . . . . . . . . . . 134.2 Element Library . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.2.1 Generalized Moments and Forces . . . . . . . . . . . . . 134.2.2 Plane Strain Element Input . . . . . . . . . . . . . . . . 134.2.3 Axisymmetric Element Input . . . . . . . . . . . . . . . 144.2.4 Flow Element Input . . . . . . . . . . . . . . . . . . . . 14

4.3 Analysis Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 144.3.1 Temperature Unit Conversion Offset . . . . . . . . . . . 144.3.2 Direct Solution Procedure . . . . . . . . . . . . . . . . . 144.3.3 Solution Procedure Accuracy . . . . . . . . . . . . . . . 144.3.4 Eigenvalue Analysis Solver . . . . . . . . . . . . . . . . 144.3.5 Spectral Response Analysis . . . . . . . . . . . . . . . . 154.3.6 User-supplied Subroutines . . . . . . . . . . . . . . . . . 16

4.4 Application Modules . . . . . . . . . . . . . . . . . . . . . . . . . 164.4.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164.4.2 Mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Index 17


Preface

In this document, the new features of Diana-9.2 are presented. The majornew analysis capabilities in Diana-9.2 compared to Diana-9 are summarized inChapter 1. Adaptations with respect to the pre- and postprocessing capabilitiesare given in Chapter 2. The arrangement of the Diana-9.2 User’s Manual isdescribed in Chapter 3. Finally, in Chapter 4 the incompatibilities of Diana-9.2compared to Diana-9 are given.


vi Preface


Chapter 1

Analysis Capabilities

1.1 Input Data File

1.1.1 Named Data Sets

An optional input data item NAME has been added to the input syntax for tables’MATERI’, ’GEOMET’, ’DATA’. This new data item allows a name (text string)to be given to each set of data in these tables. This name is primarily usedfor communication with external pre- and postprocessors. See Volume MaterialLibrary and Volume Element Library for more information.

1.2 Element Library

1.2.1 T15SH Element Area Integration Scheme

The T15SH curved shell element has been extended with the possibility to applya 2×2 element area integration scheme normally applied in quadrilaterals. Withthis integration scheme, the T15SH element behaves as a Q20SH element ofwhich nodes 1 and 4 coincide. Depending on the application, the new integrationscheme leads to improved analysis results. For more information, see VolumeElement Library.

1.2.2 L4HT Cooling Pipe Start Node Number

The L4HT cooling pipe flow element is extended with the STRTNO input optiondefining the node where the fluid enters the pipe element. This option facili-tates the modelling of a complete cooling pipe using several elements that aresequentially connected. It is no longer necessary to input these sequentially. Formore information, see Volume Element Library.


2 Analysis Capabilities

1.2.3 Fluid–Structure Interface Pressure Support

In solving the structural domain of a fluid–structure interaction analysis, thepressure degrees of freedom of the fluid–structure interface elements are nowsuppressed automatically. Therefore, these degrees of freedom no longer needto be suppressed via input table ’SUPPOR’. For more information, see ‘Pressuresupports’ in Volume Element Library.

1.3 Material Library

1.3.1 Pressure Loading in Time and Space

With an input format analogous to the ’TEMPER’, ’CONCEN’ and ’MATURI’tables, a ’PRESSU’ table has been added. The ’PRESSU’ table enables thespecification of a pressure load and pressure ambient variable in time and space.This is an alternative for the specification of a pressure load with input itemPRESSU in subtable ELEMEN of table ’LOADS’ in combination with a time–loaddiagram in table ’TIMELO".

1.3.2 Jardine Elastoplasticity

The Jardine model for elastoplasticity has become available. This model can becombined with Tresca plasticity. It is particularly suited for clay-like materials.See Volume Material Library for more information. An application of the Jar-dine model is presented in the new analysis example “Pit Excavation in 3D” inVolume Geotechnical Analysis.

1.3.3 Smeared Crack Model Ambient Dependency

In the specification of the tension softening properties of the Smeared Crackmodel depending on ambient influences, now also the fracture energy Gf can bespecified as a function of temperature, concentration, and maturity. For moreinformation, see ‘Smeared Cracking’, ‘Tension Softening’ in Volume MaterialLibrary.

1.3.4 Total Strain Crack Model Ambient Dependency

The crack models based on Total Strain can now be used in combination withthermal or concentration expansion. Ambient dependency of the tension param-eters ft and GI

f , the compression parameter fc and the shear retention parameterβ has been added. These dependencies on ambient variables (temperature, con-centration, maturity, and pressure) may either be specified through diagramsfor dependency on a single ambient value, or through user-supplied subroutinesfor simultaneous dependencies on multiple ambient values. See Volume MaterialLibrary.


1.3 Material Library 3

1.3.5 Total Strain Crack Model Tension Softening

The tension softening properties of the Total Strain Crack model now can alsobe specified in terms of the ultimate strain εcr

u . For more information, see ‘TotalStrain Crack Models’, ‘Tensile Behavior’ in Volume Material Library.

1.3.6 Monti–Nuti Plasticity

The Monti–Nuti model is a special plasticity model for the cyclic behavior ofsteel. It is is available for embedded reinforcements. The model can be combinedwith four different hardening types: kinematic hardening, isotropic hardening,mixed kinematic and isotropic hardening, and memory hardening. For moreinformation, see ‘Monti–Nuti Plasticity’ in Volume Material Library.

1.3.7 Time Dependent Diffusion Coefficient of Concrete

In a potential flow analysis, for isotropic conductivity, now an additional timedependency may be specified to simulate a time dependent diffusion coefficient ofconcrete. For more information, see the DIFPOW input item in Volume MaterialLibrary.

1.3.8 Convection and Radiation in Potential Flow

For boundary elements in a potential flow model, the formulation of the convec-tion has been enhanced with a ‘convective power’ parameter. See the CONPOWinput item in Volume Material Library. For boundary elements in heat flowanalysis Diana now also offers a radiative type of discharge via the EMISSIinput item. If both convective and radiative discharge properties have beendefined, it is possible to specify which of the two types of discharge should beapplied in the analysis. For more information, see the FLUXTY input item inVolume Material Library

1.3.9 Modified Maekawa Concrete Model

The Modified Maekawa Concrete model is now also available for axisymmetricand plane strain elements. The model has also been extended with the crack-reclosing option (RECLOS) for smooth closing of cracks in the transition from thetensile to the compressive regime. Moreover, a user-defined correction factor forthe plastic evolution (BFAC) has been added to the input data.

The Modified Maekawa model is also extended such that it can be used withvariable shear-retention functions in which the shear-retention can be defined asfunction of crack-normal-strain and/or crack-shear-strain. See the SHRCRV inputitem with MULTLN and BEDIAG. There are also two new shear-transfer functionsbased on Contact Density. See the SHRCRV input item with MAESHR and MAEDEC.Alternatively, the shear behavior can be modeled via a user-supplied subroutineUSRSHR.



1.3.10 Hardin–Drnevich & Ramberg–Osgood Soil Models

The Hardin–Drnevich and Ramberg–Osgood soil models have become available.Both are elastic models with a nonlinear shear stress–shear strain relationship.These models may be applied in a nonlinear analysis with Module nonlin. Formore information, see ‘Simple Soil Models’ in Volume Material Library.

1.3.11 Position Dependency of Material Properties

The properties for linear elasticity, Mohr–Coulomb plasticity, and Coulomb fric-tion can now be specified depending an their position in space. A typical ap-plication is soil where the properties may vary with the depth in the soil layer.For more information, see ‘Position Dependency’ in Volume Material Library.

1.4 Analysis Procedures

1.4.1 Automatic Tying of Loose Elements

The automatic tying feature of loose elements has been enhanced. Now, insteadof a single master element, multiple beam or shell master elements can be spec-ified which must automatically be tied to the slave elements. Elements that arenot of the beam or shell type are skipped. For more information, see ‘AutomaticTying’, ‘Loose Elements’ in Volume Analysis Procedures.

1.4.2 Spectral Response Analysis

The spectral response analysis procedure has been extended with an input op-tion defining the working direction. Previously, the base acceleration was ap-plied in all directions at once. The working direction is specified using theDIRECT option of the EXECUT command. Further, several output items havebeen added, and in addition to the SRSS summation rule, now also the ABSrule is accepted. For more information on the background theory of the newimplementation and on the application of the new functionality, see VolumeAnalysis Procedures.

1.4.3 Automatic Load and Time Increments

The down-stepping factor for automatic load and time increments in a nonlinearanalysis is now user definable, see the parameter CUTBCK in Volume AnalysisProcedures. The default value is 0.25, which is equal to the fixed value inDiana-9.

1.4.4 Stability Analysis of Reinforced Structures

Handling of reinforcements in stability analysis has been adapted. As a result,the analysis results have improved.


1.5 Application Modules 5

1.4.5 Direct Solution Procedure

The out-of-core direct solution procedure has been reimplemented to improveits performance. Now, ordering is applied implicitly without any customizationbeing required. For more information about the solution procedure, see chapterSolve System of Equations in Volume Analysis Procedures.

1.4.6 Eigenvalue Analysis Solver

The eigenvalue analysis solver is now based on the robust Restarted Arnoldimethod, as available in the ARPACK software library. The Subspace Iterationmethod and the Lanczos method have been removed. See chapter EigenvalueAnalysis in Volume Analysis Procedures for more information on how the neweigenvalue analysis solver should be applied.

1.4.7 Output for FX+

The output capabilities of Diana are enhanced with output for FX+. Usingthe FXPLUS device option on OUTPUT provides the user with a Post-Neutral filefor FX+. For more information on generating FX+ output, see Volume AnalysisProcedures. For more information on using FX+ and the Mesh Editor forpre- and postprocessing purposes based on the Post-Neutral file for FX+, seeChapter 2.

1.4.8 User-supplied Subroutines

A new subroutine INVMTX has been added to the programmers service librariesfor user-supplied subroutines. This subroutine calculates the inverse of a matrixby a partial pivoting algorithm. For more information see Appendix A of VolumeAnalysis Procedures.

1.5 Application Modules

1.5.1 Input of FX+ and Nastran

The input Module now is compatible with the .fxd Pre-Neutral file formatgenerated by FX+. For more information see the new Volume FX+ for DIANA.Further, the capabilities with respect to reading the Nastran format havebeen improved and extended. The most important addition is the possibilityto convert models for heat flow analysis. Moreover, the Nastran free-formatcan now be converted. For more information see Volume Application Modules.With respect to reading data files, the error handling has improved, as a resultof which input errors can be reported to the user at an earlier stage.


Chapter 2

Pre- and Postprocessing

2.1 The Mesh Editor

The Mesh Editor functionality has been extended considerably. The majorchanges compared to Diana-9 are described below.

Input Now, the model data can be also imported from the Filos file. Further,the Mesh Editor is compatible with the .fxd format generated by FX+.

Editing The material, geometry, and data properties can be edited. Further,these properties can be imported from a library included in the distribution,or from one created by the user. The load combinations can be edited as well.Further, groups not used for the specification of the finite element model can becreated, edited and deleted. This functionality can be useful for visualisationand output purposes.

Performance All editing actions can be undone using Undo/Redo functional-ity. Further, the Diana analysis can be started directly from the Mesh Editor,with the model information being passed on. The analysis working directoryand the output directory are configurable.

Graphics Now all items of a Diana model are viewable. New items are, forinstance, initial fields, ambient time dependencies and boundary loads. Further,the model nodes and elements can now be labelled based on the group theybelong to. The rendering can be combined with the rendering of other modelparts, such as tyings. The rendering of higher order elements has been improved.


8 Pre- and Postprocessing

2.2 Analysis Setup

Now, the complete analysis can be set up through the graphical user interface.It is no longer needed to set up the analysis through command files. Further,all different analysis steps can be tuned. Previously, this was possible for thelast step added only. The different steps can be named by the user. Further,the steps can be copied, deleted, and moved, both on an individual basis, orselected as part of a group. Finally, now a complete overview of the differentanalysis steps is given, including the history.

2.3 FX+ for DIANA

Diana-9.2 is fully compatible with the FX+ pre- and postprocessor. Apartfrom the benefits of FX+ itself, the combination of Diana with FX+ providesthe user with the possibility to perform the pre- and postprocessing with FX+

on a MS Windows platform, while the computational analysis using Diana isperformed on a Linux/Unix platform. For more information see the new VolumeFX+ for DIANA.


Chapter 3

User’s Manual

3.1 Volumes

The information in the Diana-9.2 User’s Manual is collected in the same vol-umes as for Diana-9: Getting Started, Element Library, Material Library,Analysis Procedures, Pre- and Postprocessing, Analysis Examples, Geotechni-cal Analysis, Application Modules, and a Cumulative Index. Additionally, twonew volumes are now part of the manual set: Concrete and Masonry Analysisand FX+ for DIANA.

3.1.1 Analysis Examples

Some examples have been added to Volume Analysis Examples. Most examplesare remakes of former case studies, presented in dedicated Diana courses. Someexamples have been moved to Volume Concrete and Masonry Analysis.

3.1.2 Concrete and Masonry Analysis

This new volume comprises instructive and annotated examples of definitionand analysis of concrete and masonry models. Most examples are remakes offormer case studies, presented in dedicated Diana courses. Some others havebeen moved from Volume Analysis Examples to Volume Concrete and MasonryAnalysis.

3.1.3 FX+ for DIANA

This volume is a first presentation of the use of the FX+ finite element modelingand postprocessing software in combination with the Diana analysis code.


10 User’s Manual

3.1.4 Geotechnical Analysis

Some instructive examples have been added to Volume Geotechnical Analysis:

� “Failure of a Geotextile-Reinforced Embankment” describes a nonlinearstress analysis of an embankment on soft soil.

� “Consolidation of an Embankment on Soft Subsoil” is about phased cou-pled flow–stress analysis of an embankment on peat and silt.

� “Consolidation of an Embankment on Clay” is about phased coupled flow–stress analysis of an embankment on clay.

� “Pit Excavation in 3D” describes a full three-dimensional phased nonlinearstress analysis of an excavation pit.

� “Liquefaction of Earth Dam” is an ancient example, formerly describedin the Diana-7 User’s Manual. It has now been completely redesigned toconform the iDiana pre- and postprocessing capabilities.

3.2 Distribution Formats

The standard Diana-9.2 distribution comes with the User’s Manual in HTMLand Portable Document Format (PDF). Available on request are manuals inprinted book form and in PostScript format.

3.2.1 HTML for On-line Access

The HTML format is still the most popular format for hypertext documents.To access the HTML pages you need a browser program, for instance MicrosoftInternet Explorer in a Windows environment. With a browser you have easy,on-line and interactive access to the complete User’s Manual. This format isalso accessed automatically via some Help functions of the iDiana GraphicalUser Interface. As the HTML format is less suited for printing on paper werecommend the PDF and PostScript formats for that, or you could purchasethe manuals in book form.

3.2.2 Portable Document Format

This format is particularly useful to printout or display parts of the manual inthe nicely typeset book style. The Acrobat® Reader program by Adobe SystemsInc. provides for a convenient access to the PDF format. You may downloadthis program free of charge from the Adobe web-site at http://www.adobe.com.To properly view the Diana User’s Manual we advise Acrobat Reader 7.0 orlater.


3.3 Compatibility 11

3.2.3 Books

The book form is still the most convenient one for reading of extensive portionsof text, particularly if these contain many mathematical formulae.

3.2.4 PostScript

Particularly in unix environments the PostScript format for documents is analternative to the PDF format. Most high-end office printers directly acceptthis format for printing on paper. The GhostView utility, distributed by theFree Software Foundation, is a much-used reader for documents in PostScriptformat.

3.3 Compatibility

This edition of the Diana-9.2 manual is compatible with release 9.2 of theDiana code.


12 User’s Manual


Chapter 4

Incompatibilities

4.1 Batch Commands

File conversion. A utility program d92com comes with the 9.2 release whichmay help you to convert command files from Diana-9 to Diana-9.2. Thed92com program works like a UNIX filter: it reads an old Diana-9 command filefrom the standard input and writes the new file to the standard output. Withfile redirection the UNIX command looks like:

d92com < old.com > new.com

We advise you to look carefully at the messages on the standard error file, tosee if any commands could not be converted properly. In that case you shouldmanually edit the new file to get correct commands.

4.2 Element Library

4.2.1 Generalized Moments and Forces

The option to output generalized moments and forces for solid brick elementsin a single layer is no longer available. Therefore, the input data item GSTRESin table ’DATA’ is no longer accepted. The possibilities of the GSTRES optionare fully covered by the ‘composed solids’ option [Vol. Element Library ].

4.2.2 Plane Strain Element Input

A load on the entire volume of a plane strain element, i.e., on the element facein the XY -plane, must now be input via a FACE data item. The VOLUME dataitem is no longer accepted. Consistently, the input of a load on the entire faceof an infinite plane strain element, i.e., on the line that represents the elementin the XY -plane, must now be input via a LINE data item instead of a FACEdata item.


14 Incompatibilities

4.2.3 Axisymmetric Element Input

A load on the entire volume of an axisymmetric solid ring element, i.e., on theelement face in the XY -plane, must now be input via a FACE data item. TheVOLUME data item is no longer accepted. Consistently, the input of a load onthe entire face of a shell of revolution element, i.e., on the line that representsthe element in the XY -plane, must now be input via a LINE data item insteadof a FACE data item.

4.2.4 Flow Element Input

For two-dimensional and axisymmetric flow elements a load on the area, i.e.,on the element face in the XY -plane, must now be input via a FACE data item.The VOLUME data item is no longer accepted. Consistently, the input of a loadon the edge of these elements must now be input via an EDGE data item insteadof a FACE data item.

4.3 Analysis Procedures

4.3.1 Temperature Unit Conversion Offset

The conversion offset from kelvin to degree Celsius has been corrected from 0°C = 273 K to 0 °C = 273.15 K. This may yield slightly different results if theunit for temperature is explicitly specified in table ’UNITS’.

4.3.2 Direct Solution Procedure

Due to implicit ordering in the new direct solution procedure, the ORDER com-mand is no longer accepted. For more information, see chapter Solve System ofEquations in Volume Analysis Procedures.

4.3.3 Solution Procedure Accuracy

The tolerance setting for the solution procedure accuracy now not only appliesto the iterative procedure, but also to the automatically chosen solution method.Therefore the TOLERA parameter now has to be inserted directly in the SOLVEcommand block instead of in the ITERAT command block.

4.3.4 Eigenvalue Analysis Solver

Since the Subspace Iteration method and the Lanczos method have been re-moved, the commands associated with these eigenvalue analysis solver methodsare no longer accepted.


4.3 Analysis Procedures 15

4.3.5 Spectral Response Analysis

Due to the adaptations to the Spectral Response analysis procedure, the com-mand syntax of Module spectr has changed. Now, a working direction hasto be specified using the DIRECT item. Further, the mode selection now is per-formed in the OUTPUT block together with the specification of the summationrule. The SUPERP type of the FORCE output item is no longer available. The su-perposed maximum forces as computed in Diana-9 now can be obtained usingFORCE RESIDU, using the SRSS summation rule.For a description of the new syntax, see Volume Analysis Procedures. Withthe help of the d92com utility, the Diana-9 syntax can be converted to that ofDiana-9.2. The syntax conversion is illustrated below.

9 file .com

...

*SPECTR

BEGIN EIGEN

FREEVI PRESTR LOAD=2

EXECUT NMODES = 10

OUTPUT OFF

END EIGEN

BEGIN RESPON

REDUCE MODES 1-4

EXECUT EXCITA 0. 0. 5. 1.0 15. 1. 20. 0.

BEGIN OUTPUT TABULA

FORCE MODE

FORCE SUPERP

END OUTPUT

END RESPON

*END

9.2 file .com

...

*SPECTR

BEGIN EIGEN

FREEVI PRESTR LOAD=2

EXECUT NMODES = 10

OUTPUT OFF

END EIGEN

BEGIN RESPON

BEGIN EXECUT

EXCITA 0. 0. 5. 1.0 15. 1. 20. 0.

DIRECT = 2

END EXECUT

BEGIN OUTPUT TABULA

SELECT MODES 1-4


16 Incompatibilities

FORCE RESIDU

END OUTPUT

BEGIN OUTPUT TABULA

SELECT MODES 1-4 SRSS

FORCE RESIDU

END OUTPUT

END RESPON

*END

4.3.6 User-supplied Subroutines

Some changes have been made to the programmers service libraries for user-supplied subroutines. The subroutines INVSYM to invert a symmetric matrixand DETSYM to calculate the determinant of a symmetric matrix are no longeravailable. Their functionality is now fully covered by the new subroutine INVMTX.

4.4 Application Modules

4.4.1 Input

Due to the more stringent character of the new input Module, unofficial syn-tax is no longer accepted. Due to the extended error checking, the moduleperformance may be less than before.

4.4.2 Mesh

The obsolete mesh generation Module mesh in Diana batch mode is no longeravailable. For mesh generation, users are requested to use the iDiana Designenvironment or the new pre- and postprocessor FX+. Alternatively, users canutilize the Nastran input option of the Mesh Editor.


Index

Page numbers. Bold face numbersindicate pages with formal informationabout the entry, e.g., a syntax descrip-tion (36). Italic numbers point to aninstructive example of how the conceptin question might be used (132 ). Un-derlined numbers refer to theoreticalbackgrounds on the subject (95).

Keywords. Sans serif type style re-fers to the interactive interface (EYE).Typewriter style refers to the batch in-terface (YOUNG).

Symbols

FX+ for DIANA, 8filos file, 7

A

ABS rule, 4Analysis commands, see CommandsAnalysis examples, 9Analysis Procedures, 14Analysis Setup, 8Automatic load increments, 4Automatic time increments, 4Axisymmetric elements, 14

B

BFAC input, 3Boundary elements

heat flow, 3

potential flow, 3

C

ClayJardine model, 2

Concrete, 9Convection

boundary elements, 3Crack-reclosing option, 3CUTBCK parameter, 4

D

DETSYM subroutine, 16DIFPOW input, 3DIRECT command, 15Direct solution procedure, 5, 14

E

EDGE inputflow elements, 14

Eigenvalue analysis, 5, 14Elastoplasticity

clay, 2Element library, 13

F

FACE inputaxisymmetric elements, 14axisymmetric shell elements, 14flow elements, 14plane strain elements, 13

File conversion, 13Flow elements, 14Fluid–structure interaction analysis, 2Fluid–structure interface, 2


18 INDEX

FLUXTY input, 3FORCE command, 15FX+, 7–9FX+ input, 5

G

Generalised forces, 13Generalised moments, 13Geotechnical analysis, 10GSTRES input, 13

H

Hardin–Drnevich soil model, 4Heat flow analysis, 5

I

input module, 16Interactive Diana, see iDianaInterface elements

fluid–structure, 2INVMTX subroutine, 5, 16INVSYM subroutine, 16ITERAT command, 14

J

Jardine elastoplasticity, 2

L

L4HT element, 1LINE input

axisymmetric shell elements, 14plane strain elements, 13

M

Maekawa model, 3Manual, 9Masonry, 9Mesh Editor, 7Mesh generation, 16mesh module, 16

Monti–Nuti plasticity, 3

N

NAME input, 1Nastran input, 5

O

ORDER command, 14Output

FX+, 5OUTPUT command, 15

P

Plane strain elements, 13Position dependency of material prop-

erties, 4’PRESSU’ table, 2Pressure

vs. time, 2

R

Radiationboundary elements, 3

Ramberg–Osgood soil model, 4RECLOS input, 3Reinforcement

stability analysis, 4RESIDU option, 15

S

SHRCRV inputMaekawa model, 3

Smeared crack modelambient dependency, 2

Soilposition dependent properties, 4

Soil modelsHardin–Drnevich, 4Ramberg–Osgood, 4

Solution procedure accuracy, 14SOLVE command, 14Spectral response analysis, 4, 15SRSS option, 15


INDEX 19

SRSS rule, 4Stability analysis

reinforcement, 4Summation rules, 4SUPERP option, 15’SUPPOR’ table, 2

T

T15SH element, 1Temperature unit

conversion offset, 14Time dependent diffusion coefficient, 3TOLERA parameter

solution procedure, 14Total Strain cracking

ambient dependency, 2tension softening, 3

Tyingsautomatic tying, 4

U

User’s manual, 9User-supplied subroutines, 5, 16USRSHR user-supplied subroutine, 3

V

VOLUME inputaxisymmetric elements, 14flow elements, 14plane strain elements, 13


20 INDEX


diana relnot

Documents

diana system

tno diana bvfebruary

tno diana bvp

sole property of tno

analysis examples

geotechnical analysis

analysis setup

masonry analysis