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Notes from GENSYS USERS GROUP meeting held in Stockholm 01-03-06

Author: Ingemar Persson (DEsolver)

Updates in GENSYS release 0103

Information about the updates in the new release was given. The new features in release 0103 are summarized in the document rel0103news. During the presentation of release 0103 the following comments were noted:

• Check that properties given in a coded file not can be stored as variables for later postprocessing in a MPdat-file.

• Instead of having three different programs for track quality calculation trc_qnumb_mauz, trc_qnumb_strix and trc_qnumb_track. Replace them with one program which handles all track-formats and can evaluate track quality in three different ways: Mauzin, STRIX and CEN TC256/WG10.

• Print time and date in script pri.

• Add possibility to add passenger masses in NPICK without having any modal shapes.

• In GPLOT make a toggle-button which deselects all symbols.

• In script predat list also files with extension *.frespf, *.modalf, *.quasif and *.tsimf.

• Make it possible to run program NPICK under command pre_process without copying the input data file in a sed command first.

Computer demonstration

In the computer demonstration was some of the new features shown, and how to work in the new user window "genfile". The computer demonstration also spend some time in showing how to write goal-functions in program OPTI, and how to sum up results from many different simulations.

Items considered from the meeting notes written in March 2000.

The full list of new features in rel.0103 is given in document rel0103news. Following items came from last year meeting notes:

• Write a program which classifies the track standards according to QN1, QN2 and QN3 suggested in UIC518 and CEN TC256/WG10.

• Create a program calculating Q-numbers of a track according to the Swedish banverket:s STRIX method.

• Test the rail profile measurements made by the track recording car STRIX, if they are so accurate so they can be used as input data to program KPF.

• Make the definition of positive directions for couplings more clear.

• A new program which can encrypt the property files used in GENSYS. The decryption will take place in the input data reading phase in the programs FRESP, MODAL, QUASI or TSIM.

• Animate the lateral and vertical track forces in the modal view of program GPLOT.

• Make it possible to write graphic output in EPS-format.

• Faster execution of program NPICK.

• Faster execution of program KPF when I2KP=2.

• Read all filenames with character*132 instead of character*80.

Items to be included in GENSYS rel.0203.

Following items were discussed at the meeting, and the goal is to include these items in rel.0203.

• In transition curve type Ruch make it possible to have smoothing over a fixt distance, instead of a relative value.

• Kinematic couplings between different coordinate systems.

• Make the reading of designed track geometry more condesed.

• Make it possibly to use {}-parenthesis everywhere in the input data file.

• Reading of property in a coupling should be made in a similar way as it is done when reading data to the wr_coupl-substructure files.

• Possibility to model vehicles without axle between the wheels.

• Introduce a possibility to give wheel and rail profiles directly in the input data file to program CALC.

• During the calculation in program OPTI or TSIM, make a prediction of how much time it will require to finish the task.
• In program MPLOT in interactive mode edit the diagrams with program NEDIT instead of the standard Motif-editor.

• As an option, paint the surfaces of the bodies in GPLOT.

• Make it possible to write an animation in GPLOT in AVI or MPEG-format.

• A more detailed model of the carbody in GPLOT, containing more nodes interpolated from the FEM-results.

• Add possibility to write the value of an animated force.

• Resize or remember the size and position of the draw_deform-window.

• In the draw_deform-window write only positive frequensis.

• In program NPICK print more information to standard output so the user can see that the program is running.

• Introduce an option in program PREDAT where it is possible to suppress the writing of a fodat-file, if the user is only interrested in the expanded files.

• Extend the trax-data format so it will also incorporate the designed track geometry.

• Installation script for GENSYS which only installs the calculation parts in GENSYS, suppressing the linking of GPLOT and MPLOT in interactive mode.

• Translate part number 1 of the GENSYS documentation into HTML-format so it can be read on-line. Organize the documentation in HTML-format and the printed documentation in the same way, in order to make it easier to replace old documentation with new documentation from the computers harddrive.

Items to be included in a future release of GENSYS.

• Consider non-elliptical surfaces, by using FASTSIM with different flexibility parameters in different stripes of the contact surface, according to the Kik-Piotrowski method.

• A substructure-file using program PRE_CONTACT and CONTACT for calculating creepforces directly in program CALC.

• In program FRESP, select fstart, fstep and fstop automatically when an input Fourier spectra is read from program FTRANS.

• Create a local coordinate system which pitches in transition curves.
• Add possibility in program CALC to consider vertical curves.

• To further reduce the simulation time in program TSIM, a big hard coded user function could be defined, which models a conventional bogie with ordinary primary- and secondary- suspension.

• Translate program MPLOT into double precision.

• In program MPLOT, introduce possibility to click on the coordinate axis for information and for possibility to change current scales.

• Add possibility to calculate percentiles without creating a cumulative frequency function.

• Possibility to automatically calculate ride index according to PCT and NMW.

• Add possibility in program GPLOT to animate results from program FRESP.

• Make a script trc_trac_strix which converts track data files into STRIX-format.

Next meeting.

Next meeting in the GENSYS USERS GROUP will be held in Borlänge on the afternoon of the 9:th or 16:th April year 2002, depending on when next years Nordic Railway Seminar will be held.