SIMPACK - Science topic

ERROR: Cannot determine nominal rail offset of Rail-Wheel Pair $RWP_Bogie_B_Wheelset3_Right. ret = 1

Please try again with better initial values.

In the simpack locomotive model, a JM3 tread that actually runs 100,000 kilometers is introduced. The model cannot run, and the above error situation occurs. The introduction of this tread in other high-speed vehicles can operate normally.

There is the error message..

Please check the file.

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Error : cannot determine nominal rail offset of Rail-wheel pair

$S_Bogie_F.$S_WS_F.$RWP_R.

ret = 1

Please try again with better initial values.

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Even when multiple railway tracks are defined within a model in Simpack software, only one can be activated at a time. However is it possible to show two tracks simultaneously, for visualisation purpose? Example- In a turnout, to show straight and divergent routes.

Thank you.

Hey,

I am working on the Multi body dynamics of a 300kW VAWT as part of my graduation thesis. I have created a reduced order model of the turbine using SIMPACK (MBD solver from dassault systems). I am facing some difficulties with running modal analysis due to error in modal matrix being singular.

I am reaching out to people who have worked with SIMPACK, hoping to get some help with my model .

I'm a Masters Student at TUM and I have been working on a project with SIMPACK I have made the stress analysis on my model in SIMPACK and also exported the fatigue input for fe-safe but when I try to import that data file into fe-safe i keep getting the error 'Failed to read stress information from FBI file.' How do I tackle this because after the error fe-safe reads the Groups and Assembly but my Datasets keep coming empty as a result I cannot perform the fatigue analysis. Does anybody know the solution to this error or what am I doing wrong. Also is there any why I can bring this fatigue data directly in ansys so that maybe i can analyse there if not fe-safe?

I am working on a Matlab script, trying to implement a Simulated Annealing algorithm to obtain once and again the eigenvalues from a Simpack model.

What I want to do is to generate some new parameters in Matlab, then, copy those parameters and paste them as Subvars in the model that I have in Simpack. So, the question is, how can I modify Simpack Model's Subvars from Matlab, refresh the model and run Simpack's Eigenvalue Solver again, with the modified model?

Good evening to you all.

I have modeled a bogie using Simpack software and i tried to connect the primary suspensions, secondary suspensions but this bogie leaves the track (flies) and after 4 seconds, it comes come back on the track and moves normally. I am confused and i dont know why this is happening? I have followed the tutorials on youtube but they are incomplete. Please help. Thank you.

I am conducting research to know the responses of the passenger train collision difference scenario with multibody dynamic method. I use SIMPACK software to buid the model. but, I can't get the good result especially on the acceleration result. I got very big deceleration. Any body have same experience like me? any suggestion for another software for better result? I have a plan to improve my research and continue with hybrid model using finite element and multibody dynamic to precisely know the responses during collision.

I can find papers about the "quasi-elastic" contact search method used in older versions of Simpack. However, I could not come across with some papers describing equivalent elastic contact search method used in newer versions of Simpack. Is there anyone knows some references about it?