SpaVisual User Manual
Contents
1. MAIN KEYWORD arguments SUB_KEYWORD arguments SUB_KEYWORD arguments MAIN_KEYWORD arguments SUB_KEYWORD arguments etc The keywords and arguments can be separated by one or more spaces or tabs are case insensi tive and any keywords following a or are treated as comments In the Sections ahead the keywords that control the element animation and mode settings are explained Keywords overview This section provides an overview of all available visualization keywords Detailed information about these keywords is given in the sections ahead Table 3 1 Keywords overview MAIN KEYWORDS SUB KEYWORDS arguments sequence of element numbers CROSSTYPE rect recthol circ circhol line CROSSDIM list of cross sectional dimensions NUMSECTIONS integer SHOWJOINTS 0 1 TRUSSPROPS sequence of element numbers CROSSTYPE rect recthol circ circhol line CROSSDIM list of cross sectional dimensions HINGEPROP sequence of element numbers CROSSDIM diameter and thickness Section 3 3 DAT file interface MAIN KEYWORDS SUB KEYWORDS CROSSDIM X Y Z R PHI LINESTYLE LINEWIDTH EDGEALPHA EDGECOLOR EDGELIGHTING FACEALPHA FACECOLOR FACELIGHTING BACKFACELIGHTING AMBIENTSTRENGTH DIFFUSESTRENGTH SPECULARSTRENGTH SPECULAREXPONENT SPECULARCOLORREFLECTANCE OPACITY LIGHTING VISIBLE COLOR LINESTYLE LINEWIDTH MOVIENAME RECORDMOVIE AVITYPE AVIOPTS VIEW LIMITS XLIM YLIM ZLIM 12. Determines the diameter and thickness of the selected hinge elements WHEELPROPS Sequence of element numbers Main keyword for wheel element settings Selects wheel elements from the supplied el ement numbers If no arguments are specified all wheel type elements wheel and plwheel are selected Its only sub keyword is CROSSDIM thickness scalar default 0 002 Determines the thickness of the selected wheel elements DONOTDRAW Sequence of element numbers or one of the following strings beam rbeam tube truss hinge wheel plbelt Determines which elements not to draw The string arguments also work for their 2D equivalent elements MESH Sequence of element numbers Main keyword for mesh settings of beam type elements for stress analysis Mesh settings are assigned to beam or truss type elements from the supplied element numbers The mesh settings determine the number of evaluation points in the elements The following sub keywords control the mesh settings TOT integer or one of the following strings coarse normal fine Determines the total amount of evaluation points The number of evaluation points represented by the string arguments is different for the 1D line cross sectional type and the other 2D cross sectional types see Table 8 3 X Y Z R PHI integer Determines the amount of evaluation points in the x y z radial or rotational direction If one or more of these sub keywords are not spec
3. The generalized eigenvalue problem is then solved to find the eigenmodes and eigenfrequencies Kv AMv A w 2 3 where v is an eigenmode with corresponding eigenvalue A and eigenfrequency w If the vibration mode analysis is turned on new controls in the GUI become available VIBRATION MODE OPTIONS Controls which vibration mode is shown With e aslider to selected different vibration modes e a user supplied scale factor to scale the eigenmode e aLIST MODAL FREQUENCIES button to list all eigenfrequencies VIBRATION ANIMATION CONTROLS Controls the vibration animation around the current configuration of the model The current configuration of the model is represented by the red dotted lines When SPACAR is run in mode 8 SPAVISUAL visualizes buckling modes in a similar manner as the vibration modes For more details about buckling analysis the reader is referred to the SPACAR user manual 1 Section 2 3 Visualization controls 9 laf File Edit View Insert Tools Desktop Window Help SpaVisual Display SPACAR mode 0 Under train fe Toverconstraik max stress 0 048000 MPa e at time step 1 5 E 0 04 Stress component 0 03 Stress component selection 0 02 0 01 Overconstraint selection 0 01 0 02 0 03 0 04 Figure 2 4 Overconstraint analysis Over and Underconstraint analysis When SPACAR is run in mode 0 it checks whether the supplied model is solvable i e it de ter
4. are rectangular rectangular hollow circular and circu lar hollow In Chapter 3 it will be explained how to change the cross sectional properties to suit these cross sectional types More information about the computation of the cross sectional stress resultants and stresses can be found in reference 2 In Figure 2 2 stresses are computed for a deflected beam A colorbar indicates the stress levels with its range computed from the minimum and maximum occurring stress for all load or time steps Also a stress legend box appears showing the maximum stress at the current load or time step The location of this maximum stress is visualized in the model by a red dot The colorbar and stress legend can be hidden with the option HIDE STRESS LEGEND COLORBAR in the SPAVISUAL MENU SPA ISUAL deflbeam1 mode 1 3 E 10 xj File Edit View Insert Tools Desktop Window Help SpaVisual Max stress 145 712204 MPa 2 160 at time step 77 Stress component a A ma selection Movie name Y Auto Record movie Time step mo Repeat 77501 4 ml Figure 2 2 A 3D stress analysis Depending on the dimension of the SPACAR model different results are visualized 2D MODELS By default 2D models with beam type elements are drawn by lines Since cross sectional data is missing actual stresses can not be computed Instead the cross sectional stress resultants of Equation 2 1 can be visualized In the STRE
5. in SPAVISUAL By manipulating the axes properties with the user supplied function it is possible to dynamically change the viewpoint and other axes settings as time progresses Mode settings This section lists the keywords that control visualization mode specific properties Most of these options are also available in the GUI MODESHAPE Main keyword for vibration or buckling mode related settings Its sub keywords are VIBRATION integer Determines the initial selected vibration mode Can also be changed in the GUI BUCKLING integer Determines the initial selected buckling mode Can also be changed in the GUI SCALEFACTOR scalar Sets the scale factor Can also be changed in the GUI MAXIMUM integer Determines the maximum number of computed mode shapes NUMCYCLES scalar Scales the amount of cycles the mode shape is animated NUMFRAMES integer Sets the amount of frames used to animate one mode shape cycle STRESS Main keyword for stress analysis related settings Its sub keywords are COMPONENT mises default sigX tauXY tauXZ Fres Fx Fy Fz Mres Mx My Mz Determines the initial selected stress component Can also be changed in the GUI 22 Chapter 3 SpaVisual Commands SHOWMAX O 1 Toggles the visibility of the max stress location OVERCONSTRAINT integer Determines the initial selected overconstraint Can also be changed in the GUI UNDERCONSTRAINT integer Determines the initial
6. location of the dat input file In Section 2 2 the basic controls of the graphical user interface options are explained And in Section 2 3 an overview is given of the different visualization modes with their controls 2 2 Basic controls The basic controls include the animation of the SPACAR model the recording of such an ani mation and how to hide parts of the GUI In Figure 2 1 these controls are highlighted SPAVISUAL MENU Controls the way the output window is displayed It has four options HIDE UI OBJECTS Hides the user interface options and controls Useful for making clean pictures with the GUI controls removed 4 Chapter 2 SpaVisual Overview SpaVisual menu SPAVISUAL deflbeam1 mode 1 File Edit View Insert Tools Desktop Window Help SpaVisual Hide UI objects Stretch to fill Display SPACAR mode 1 cub Motion deformation Show stress Hide axis labels and tick marks Hide stress legend and colorbar Recording controls ol Movie name Auto J Record movie gt i ale Repeat 77501 lt f ml Time step Jal E Animation controls Figure 2 1 The graphical user interface STRETCH TO FILL Stretches the axis to fill all available space This option distorts the visualization of the model as the axis are generally not square anymore HIDE AXIS LABELS AND TICK MARKS Visualizes only the model without the axes HIDE STRESS LEGEND AND COLORBAR Hides stress inf
7. selected underconstraint Can also be changed in the GUI References 1 Aarts R G K M Meijaard J P Jonker J B SPACAR User Manual 2009 Technical Report WA 1180 University of Twente Faculty of Engineering Technology Mechanical Automation Labarotory March 2009 2 Boer S E Aarts R G K M Brouwer D M Jonker J B Multibody Modelling and Optimization of a Curved Hinge Flexure In The Ist Joint International Conference on Multibody System Dynamics Lappeenranta Finland May 25 27 2010 3 The Math Works Inc Getting Started with MATLAB version 7 Revised for MATLAB 7 1 Release 14SP3 September 2005 23
8. 3 arguments sequence of element numbers thickness sequence of element numbers or one of the following strings beam rbeam tube truss hinge wheel plbelt sequence of element numbers integer or coarse normal fine integer sequence of element numbers oe Nin scalar scalar between 0 and 1 r g b color values integers flat phong gouraud scalar between 0 and 1 r g b color values integers flat phong gouraud lit reverse unlit scalar scalar scalar scalar scalar scalar between 0 and 1 flat phong gouraud m by 1 matrix of time or load step indices O 1 r g b color values integers scalar string QO 1 matlab videoIO fieldname and value az el xmin xmax ymin ymax zmin zmax min max 14 Chapter 3 SpaVisual Commands MAIN KEYWORDS SUB KEYWORDS arguments VISIBLE o 1 COLOR r g b color values integers VISIBLE O 1 COLOR r g b color values integers STYLE infinite local POSITION X y z positions in axes data units VIBRATION integer BUCKLING integer SCALEFACTOR scalar MAXIMUM integer NUMCYCLES scalar NUMFRAMES integer TRE COMPONENT mises sigX tauXY tauXZ Fres Fx Fy FZ Mres Mx My Mz SHOWMAX O 1 Element settings This section lists the keywords that control the way elements in SPAVISUAL are visualized The main keyword is given first followed by its arguments and a description After which the related sub keywords are listed
9. Asides from the GUI there are more ways to interface with SPAVISUAL Settings can be changed by supplying an additional options parameter when calling SPAVISUAL or they can be predefined in the dat input file Both methods will be explained in Section 3 2 and Sec tionB 3lrespectively The types of settings that can be changed through the options structure or the dat file are e Element settings Includes settings that can change the cross sectional properties like the element shape and dimensions and graphical properties such as color and lighting e Animation settings Controls the way the model is animated Here among others figure axis settings and movie settings can be supplied e Mode settings Controls the way the different visualization outputs behave Most options given here can also be changed in the GUI 3 2 Options structure interface Documentation for these options to come in future releases 11 12 Chapter 3 SpaVisual Commands 3 3 DAT file interface To adjust the default settings of SPAVISUAL with the dat file the user can supply commands at the end of the dat file after the VISUALIZATION keyword The SPAVISUAL commands are controlled by keywords which come into two groups main and sub keywords The sub keywords define settings related to the first preceding main keyword The structure of the VISUALIZATION block in the dat file is then as follows VISUALIZATION
10. LYSIS system as a vibration OVERCONSTRAINT Visualizes the selected overconstraint mode of the ANALYSIS system as a stress distribution Stress analysis The stress analysis is available in all SPACAR modes except the zeroth mode To compute the stresses first the cross sectional stress resultants need to be determined They are denoted by Palen Filey Elek Melee M Ee MAE Es 0 1 where F Fy and F are the normal and shear forces and M M and M are torsion and bending moments acting on the cross section in its local directions at position along the elastic line of the beam The parameter is made dimensionless with respect to the original length of the beam Depending on the type of cross section the normal and shear stresses are computed from the cross sectional stress resultants resulting in Os Ex Los Es de Werd Eer Er En 2 1 F M Sy amp 4 1 Tay Ez ae Es a Tay Ers Ey a Tay EA Ens Es gt 1 2 2 tae Case AN a a o 6 Chapter 2 SpaVisual Overview where o o and 07 are normal stresses caused by the normal force and the bending mo ments around the local y and z axis 77 7 are shear stresses caused by the shear forces acting in the local y and z direction and 7 7 and 7 are shear stresses caused by torsion The dimensionless parameters and represent the location in the cross section Supported cross sectional types in SPAVISUAL
11. SS COMPONENT selection box the following options are available Fres displays the 2 norm of the force vector along the beam FX displays the normal forces F along the beam Section 2 3 Visualization controls 7 Ey displays the local y directional shear forces F along the beam Mres displays the 2 norm of the moment vector along the beam Mz displays the bending moments about the local z axis along the beam Assuming that the dimensions of the 2D model are supplied in meters m the dimen sion of the colorbar is in Newtons N or Newton meter Nm for forces and moments respectively 3D MODELS By default 3D models with beam type elements are drawn with rectangular cross sections If the user did not explicitly supply the cross sectional dimensions default dimensions are used The cross sectional stresses of an element are computed with Equation The following options see Figure 2 2 are now available in the STRESS COMPONENT selection box von Mises displays the stresses computed according to the von Mises criterion sigX displays the normal stresses oz tauXY displays the shear stresses in the local y direction 7 tauXxz displays the shear stresses in the local z direction 7 Assuming that the dimensions of the 3D model are supplied in meters m the dimension of the colorbar is in mega Pascals MPa The user should be aware of the following pitfalls and limitations when interpreting the stresses e The compu
12. SpaVisual User Manual Steven Boer and Tjeerd van der Poel 2011 Edition March 14 2011 Report No WA 1296 Table of contents Preface iii 1 Introductio 1 3 2 1 Introduction sacs aaia aa a t a a a aa i a a i aa i a a t 3 2 2 Basiccontrla a e a a a a a a a a a 3 2 3 _ Visualization controlg o e a 4 11 3 1 Tntroduction eeen 11 ed ood a yee ee ee 11 interface eee ee ooo rda sE pa renne 12 23 ii Table of contents Preface This is the 2011 edition of the SPAVISUAL manual for the visualization of SPACAR results in MATLAB The SPAVISUAL MATLAB toolbox is developed at the Laboratory of Mechanical Automation of the Department of Engineering Technology University of Twente The latest version of SPAVISUAL included in the 2011 release of SPACAR features a graph ical user interface unlike previous SPAVISUAL releases SPAVISUAL makes use of the latest SPACAR functions and is therefore not backwards compatible with older SPACAR releases A new command style to adjust visualization options is also implemented However for back wards compatibility with old style generated dat files it still supports the old visualization commands from the visualization tool implemented by Jan Bennik March 14 2011 ir S E Boer Email s e boer utwente n1 and dr ir G W van der Poel 111 iv Preface Introduction SPAVISUAL is the visualization tool for SPACAR It is a stand al
13. al shear forces tauxZ Fz displays the shear stresses 7 7 caused by local z directional shear forces Each stress component listed here is related to forces or moments in the local z y and z direction If one of these stress distributions shows no stress then there is no over constraint in that particular direction By looking at the stress distributions that do show stress the direction and location of the overconstraint can be determined Placing a re lease here will then solve this particular overconstraint As an example for the overcon straint shown in Figure 2 4 the third deformation component which corresponds to the bending deformation mode about the z axis at the p side of the beam needs to be released to solve the overconstraint An OVERCONSTRAINT SELECTION slider is available to navigate between different over constraints if more than one overconstraint is present in the model Also the LIST OVER CONSTRAINTS button can be used to show which elements in the model have overcon straints UNDERCONSTRAINTS Underconstraints appear when not enough DOFs or fixes are present in the model Un derconstraints are visualized by animating the unconstraint motion The visualization controls are similar to the vibration mode analysis If the underconstraint represents a de sired DOF in the model a DOF should be added to indicate it as such Else a fix should be added to suppress it SpaVisual Commands 3 1 Introduction
14. ctory visualization options Trajectory visualization is only avail able if a trajectory is supplied in the SPACAR model Its sub keywords are VISIBLE o 1 Toggles the visibility of the traject COLOR r g b color values integers Sets the line color of the traject LIGHT light object number s Main keyword for light object settings If no arguments are specified the settings will be applied to all available light objects If no light objects exist one will be created to apply the settings to The light object settings are controlled by the following sub keywords VISIBLE OF ijf d Toggles the visibility of the light objects COLOR r g b color values integers Sets the light color STYLE infinite default local Sets the light style POSITION X y z positions in axes data units Sets the light position USERPLOT function name Adds a user defined plot to the GUI axes The function name should be a valid m file available on the MATLAB path It needs two inputs and one output such as function funHandles fun axesHandle funHandles Here axesHandle is the GUI axes handle and funHandles are the handles of the user defined plots If in SPAVISUAL the user defined plot function is called for the first time funHandles will be empty SPAVISUAL expects the function to return the handles Section 3 3 DAT file interface 21 of the created objects Note that the user defined function is called every time or load step
15. er circhol diameter inner diameter For the computation of the stress components from Equation the dimensions listed in Table 3 2 are assumed to be supplied in meters NUMSECTIONS integer default 10 Determines the number of sections in which the element is divided More sections results in smoother visualization of beams under bending SHOWJOINTS o 1 default Toggles the visualization of joints for 2D beams TRUSSPROPS Sequence of element numbers Main keyword for truss element settings Selects truss elements from the supplied element numbers Settings from the sub keywords are assigned to these truss elements only If no arguments are specified all truss type elements are selected Truss type elements are truss and pltruss Appropriate sub keywords are CROSSTYPE rect recthol circ default 3D circhol line default 2D Determines the cross sectional type See BEAMPROPS for more information CROSSDIM Sequence of cross sectional dimensions Determines the dimensions for the supplied cross sectional type See Table 3 2 for more information 16 Chapter 3 SpaVisual Commands HINGEPROPS Sequence of element numbers Main keyword for hinge element settings Selects hinge elements from the supplied el ement numbers If no arguments are specified all hinge type elements hinge and pltor are selected Its only sub keyword is CROSSDIM diameter default 0 01 and thickness scalar default 0 002
16. ified values are as signed automatically to have an aspect ratio of about for the distance between the evaluation points Section 3 3 DAT file interface 17 Table 3 3 Number of evaluation points represented by the string arguments Cross section dimension coarse normal 1D 5 50 default 100 2D 100 1000 default 10000 GRAPHICS Sequence of element numbers Main keyword for graphics settings of elements If no arguments are specified the graph ics settings are assigned to all elements in the model The sub keywords determine ele ment lighting color and other graphical properties Supported sub keywords are LINESTYLE j s olf do 1 HONS LINEWIDTH scalar EDGEALPHA scalar between O and 1 EDGECOLOR r g b color values integers EDGELIGHTING flat phong gouraud FACEALPHA scalar between O and 1 FACECOLOR r g b color values integers FACELIGHTING flat phong gouraud BACKFACELIGHTING lit reverse unlit AMBIENTSTRENGTH scalar DIFFUSESTRENGTH scalar SPECULARSTRENGTH scalar SPECULAREXPONENT scalar SPECULARCOLORREFLECTANCE scalar See the MATLAB manual 3 on patch properties for more information on these sub key words If the Line cross sectional type is used default for 2D models only the sub keywords LINESTYLE LINEWIDTH and FACECOLOR function Other graphical sub keywords are OPACITY scalar between 0 and 1 Changes element opacity This option changes both the EDGEALPHA and FACEAL PHA optio
17. mines if no over or underconstraints are present In SPAVISUAL these over and undercon straints can be visualized This is useful for a designer to achieve an exact constraint design It also helps the user to build a correct SPACAR model since these over and underconstraint tell the user where to add or remove degrees of freedom DOFs and releases in the model OVERCONSTRAINTS Overconstraints appear when not enough releases are present in the model In Figure 2 4 a clamped clamped beam with no releases is shown The overconstraint analysis deter mines that the model is six times overconstraint To determine how to solve these over constraints they are visualized using imaginary stress distributions The visualization controls for overconstraints are therefor similar to those of a stress analysis It features a STRESS COMPONENT SELECTION box where the individual stress components from Equation 2 2 can be selected von Mises displays the stresses computed according to the von Mises criterion sigX Fx displays normal stresses o caused by normal forces sigX My displays normal stresses 04 caused by bending moments about the local y axis sigX Mz displays normal stresses 0 caused by bending moments about the local z axis tau Mx displays the 2 norm of the shear stresses 7 and 73 caused by torsion LZ 10 Chapter 2 SpaVisual Overview tauXY Fy displays the shear stresses 7 caused by local y direction
18. n simultaneously LIGHTING flat phong gouraud Changes element lighting This option changes both the EDGELIGHTING and FACE LIGHTING option simultaneously 18 Chapter 3 SpaVisual Commands Animation settings This section lists the keywords that define animation properties of SPAVISUAL such as movie options axis properties lights etc RANGE m by 1 matrix of time or load step indices Sets the animation range The range keyword accepts any valid MATLAB code defining a row vector such as 2210 06 1 4 6 a The indices should be defined in ascending order If this is not the case they will be put in ascending order INITIAL Main keyword for initial configuration settings For deformation analysis the time or load step at which the initial configuration is drawn is by default set to 1 or the first value supplied in RANGE For vibration analysis the initial configuration is drawn at the time or load step at which the vibration analysis is activated Sub keywords that define the initial configuration settings are VISIBLE 0 JA Toggles the visibility of the initial configuration COLOR r g b color values integers Sets the line color of the initial configuration LINESTYLE H ie ee none Sets the line style of the initial configuration LINEWIDTH scalar Sets the line width of the initial configuration MOVIE Main keyword for movie settings Movie settings can be changes using the following sub ke
19. one function in MATLAB and can visualize deformation vibration and buckling modes of 2 D and 3 D mechanisms It can also visualize over and underconstaints as well as stresses in beam type elements SPAVISUAL shows beams trusses and hinges among others in 2 D as well as in 3 D For users new to SPAVISUAL Chapter 2 gives an overview of all SPAVISUAL functionalities and limitations and it explains the use of the graphical user interface For the more demanding user a more elaborate overview of the SPAVISUAL commands and ways to interface with the program are given in Chapter B Chapter 1 Introduction SpaVisual Overview 2 1 Introduction Before a SPAVISUAL call can be made in MATLAB a call to the SPACAR program must be made first This requires the existence of a dat input file that defines the SPACAR model The output Of a SPACAR run is stored in SPACAR binary data files SBF These are files with extensions sbd sbm and 1tv Depending on which SPACAR mode is used the existence of one or more of these files and the input dat file is required to run SPAVISUAL For more information about the different SPACAR modes the reader is referred to the SPACAR manual 1 SPAVISUAL can be activated with the MATLAB command gt gt spavisual filename Here filename is the name of the dat input file without extensions Drive or path specifi cations are not allowed in filename so the MATLAB working directory should be set to the
20. ormation when stresses are shown ANIMATION CONTROLS Controls the animation of the model by PLAY and STOP buttons and a slider If the RE PEAT checkbox is checked the animation will automatically start again until the checkbox is cleared RECORDING CONTROLS Options for recording a movie can be found here By checking the RECORD MOVIE checkbox a movie with the supplied movie name will be recorded once the user presses the PLAY button 2 3 Visualization controls Depending on which SPACAR mode is used to run the model the functionality of SPAVISUAL changes and one or more of the following visualization modes can be selected Section 2 3 Visualization controls 5 e Deformation e Stress analysis Vibration modes e Buckling modes e Underconstraint analysis e Overconstraint analysis In Table an overview is given of the SPAVISUAL functionality for the different SPACAR modes Table 2 1 Overview SPAVISUAL functionality Visualization mode SPACAR mode Description DEFORMATION all modes except O Visualizes the deformed configuration as a function of time or per load step STRESS ANALYSIS all modes except O Visualizes the selected stress distribution in beam truss and tube elements VIBRATION MODES 3 4 7 9 Visualizes the selected vibration mode of the sys tem for the current load step BUCKLING MODES Visualizes the buckling mode after a SPACAR mode 8 run UNDERCONSTRAINT Visualizes the selected underconstraint mode of the ANA
21. ted stresses loose validity near supports or concentrated loads e Thin walled assumptions are used for circular hollow cross sections e During deformation it is assumed that the shape of the cross section remains the same e The cross sectional dimensions that are used to compute the element stiffness properties in SPACAR should be the same as the cross sectional dimensions that are used to visu alize the beam type element For instance if the elastic constants are computed using a circular cross section and the beam is visualized with a rectangular cross section incor rect relations are used to compute the stress components in Equation 2 2 which results in incorrect computed stresses 8 Chapter 2 SpaVisual Overview SPAVISUAL deflbeam2 mode 4 E lol x Fie Edit View Insert Tools Desktop Window Help SpaVisual Display SPACAR mode 4 C Motion deformation Je Show stress Vibration mode JE Vibration Selected vibration mode 3 mode options E E Scale factor f 5 Frequency 25 347 Hz List modal frequencies P 3 Vibration J Recor nE animation controls Vibration step IO TT Repeat 6 21 1 al Be ved pl Bal Figure 2 3 Vibration mode analysis Vibration and Buckling modes Vibration modes can be visualized when data from a SPACAR mode 3 4 7 or 9 run is available These SPACAR modes use linearization routines to compute the mass and stiffness matrix M and K per time or load step
22. with their arguments and description BEAMPROPS Sequence of element numbers Main keyword for beam element settings Selects beam elements from the supplied ele ment numbers Settings from the sub keywords are assigned to these beam elements only If no arguments are specified all beam type elements are selected Beam type elements are pl beam pl rbeam and pl tube Appropriate sub keywords are CROSSTYPE rect default 3D recthol circ circhol line default 2D Determines the cross sectional type The specified arguments represent respectively rectangular rectangular hollow circular and circular hollow cross sections For 3D models the line argument forces the element to be represented by a line This Section 3 3 DAT file interface 15 allows the visualization of the cross sectional stress resultants similar to a stress analysis for 2D models Vice versa if for 2D models cross sectional data is sup plied the stress components from Equation 2 2 can be visualized It is not allowed to mix the 1 ine argument with the other arguments CROSSDIM List of cross sectional dimensions Determines the dimensions for the supplied cross sectional type in the beam element local directions Possible arguments per cross sectional type are listed below Table 3 2 Cross sectional dimension arguments Cross sectional type Dimension arguments rect height width recthol height width inner height inner width circ diamet
23. ywords MOVIENAME string Determines the movie name This option can also be set in the GUI Section 3 3 DAT file interface 19 RECORDMOVIE o 1 Toggles the recording option This option can also be set in the GUI AVITYPE matlab default videoro only available if installed Determines which recording toolbox to use By default MATLAB recording func tions are used to generate a movie However if the VIDEOIO toolbox is available on the MATLAB path its recording functions can also be used AVIOPTS fieldname and value Sets the avi object properties Arguments for AVIOPTS are a fieldname with a value Valid fieldnames for default MATLAB recording functions are colormap compression fps keyframe quality videoname See the avifile function in the MATLAB manual for more information For the VIDEOIO toolbox see the videowriter function for possible fieldnames with values AXISPROPS Main keyword for figure axes properties Sub keywords that define the axes properties are VIEW az el Sets the viewpoint See the view function in the MATLAB manual for more information LIMITS xmin xmax ymin ymax zmin zmax Sets the axes limits See the axis function in the MATLAB manual for more information XLIM YLIM ZLIM min max Sets the individual axis limits See the xlim ylim and zlim functions in the MATLAB manual for more information 20 Chapter 3 SpaVisual Commands TRAJECT Main keyword for traje
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