【正文】 cal origin, and then selects one of the X, Y and Z options available to define the local W axis along one of the global axes.Below are the series of prompts and steps involved in creating a local coordinate systemwhenever a local coordinate system is required (mirror lines/elements, transform nodes, etc.).1. DYNAFORMPC prompts:DEFINE A LOCAL COORDINATE SYSTEMPICK POINT FOR THE ORIGIN2. After the origin is defined, the program prompts:PICK THE NEXT POINT3. After the coordinate system is defined, the program will prompt the user toaccept/reject the displayed coordinate system. RECOMMENDED NAMING CONVENTION (.df, .lin, .bin, etc.)The protocol for naming files during a DYNAFORMPC session includes attaching suffixes to the file names that specify the file types. The appropriate file names are listed in the options area of the screen.Examples of suffixes include:1. DYNAFORMPC database file name: 2. DYNAFORMPC geometry data file name: 3. IGES geometry data file name: 4. DYNAFORMPC model binary file name: 5. NASTRAN input file name: 6. LSDYNA input file name: 7. LSDYNA model file name: 8. DYNAIN input file name: 9. DYNAFORMPC binary result file: 10. VDA surfaces data file: Example: When reading in a line data file, DYNAFORMPC prompts for a line datafilename (all file names in that directory with the suffix .lin are listed in the options area).The user then selects the appropriate file name.This practice makes the filename selection convenient and organizes the user39。s workdirectory. SPECIFICATIONSThe standard version of DYNAFORMPC has the following specifications per database:150,000 LINES450,000 POINTS4,000 SURFACES350,000 Edge Points (SURFACE)160,000 Control Points (SURFACE)250,000 GRIDS250,000 LEMENTS1,000 PROPERTIES1,000 PIDSCHAPTER 2GETTING STARTED GETTING STARTED1. Select the DYNAFORMPC program in the PC window to activate it. Please seeFigure .Figure Getting Started2. Once the program is activated, it automatically displays the OPEN ADATABASE FILE window.3. The user supplies CADIGES data and VDA data that will be translated and readdirectly into DYNAFORMPC.4. CAD or model data is not supplied. Therefore, the user begins with an emptydatabase and generates or “digitizes” line data into the drawing. CREATE A DYNAFORM PC DATABASE FILE1. Select NEW from the FILE MENU and DYNAFORMPC displays the CREATEA DATABASE FILE window shown below. The default FILES OF TYPE isDynaform Database (*.df). There is no alternative type. The user may type in anyfilename they choose and select OPEN to create the database file. Please seeFigure .Figure Create a Database File2. Once the database file is created, DYNAFORMPC displays the ANALYSISSETUP menu as Figure .Figure Analysis Setup3. Select a unit type from the UNIT pulldown menu.4. Select a draw type from the DRAW TYPE pulldown menu. Note: Draw Type Option should relate to the type of machine used to produce the true work piece, which associates the directions of punch moving and binder loading. If you are not sure or face a new process, the user may select User Defined item. Refer to the DYNAFORMPC Application Manual for description of draw type.5. After the other items in the menu have been considered, select OK. READING GEOMETRY DATAThe user has several options when opening a file in DYNAFORMPC. One of the ways thefile can be opened is by dragging and dropping the desired file into the DYNAFORMPCprogram window or shortcut icon. DYNAFORMPC will automatically open the file if theextension is recognized and prompts the user for key parameters. The user can also doubleclick on files with extensions that DYNAFORMPC recognizes. This will openDYNAFORMPC (if unopened) and automatically load the file. The third choice is to openthe desired file via the OPEN mand in the FILE MENU. This will display the OPEN ADATABASE FILE window, which also opens automatically at the start of the program. This window controls the input and output of data in DYNAFORMPC. Please see Figure Figure Open a Database FileLOOK INAllows the user to navigate directories when opening/saving files.FILE NAMEAllows the user to specify the name of the file to open/save.FILES OF TYPEAllows the user to specify the type of file to open/save. The available file types aredisplayed in the scrolldown window. The OPEN DATABASE WINDOW onlydisplays the files that match the current FILES OF TYPE extension.If the user accidentally enters the wrong extension, DYNAFORMPC will open anotherwindow asking for the file type. Once the correct file type is selected, DYNAFORMPCopens the file.CHAPTER 3FILEThe functions in the FILE menu are shown in Figure .Figure File Manager A detailed description of each function is given in the following sections. NEWThis function allows the user to create a new database file. Please see Figure .Figure New a Database The default FILES OF TYPE is Dynaform Database (*.df). There is noalternative type. The user types a new file name in the FILE NAME field andpresses the enter key or clicks the OPEN button. If a database file has been opened and modified in DYNAFORMPC before,there will be a warning message notifying the user to save the opened file beforecreating a new one. If the filename typed by the user already exists or if the user selects a filenamefrom the file list area of the dialog window, a prompt window appears askingwhether the user wants to delete this file and create a new one or not OPENThis function allows the user to open a database or other files. Please see Figure Figure Open a DatabaseTo specify a file type, the user selects an option in the FI