vibration simulation on assemblies with nonlinear contact, NX nastran
vibration simulation on assemblies with nonlinear contact, NX nastran
(OP)
hello everyone,
I'm new with NX Nastran and I have a problem. I need to figure out which Nastran solution should be used to simulate forced vibration on a structure that include non linear contact.
My boss asked me to analyze the potential solutions in odder to purchase the needed license. so far I think the only choice is the 701 dynamic explicit solution, any other suggestion on how to simulate this problem?
thank you very much.
I'm new with NX Nastran and I have a problem. I need to figure out which Nastran solution should be used to simulate forced vibration on a structure that include non linear contact.
My boss asked me to analyze the potential solutions in odder to purchase the needed license. so far I think the only choice is the 701 dynamic explicit solution, any other suggestion on how to simulate this problem?
thank you very much.





RE: vibration simulation on assemblies with nonlinear contact, NX nastran
Cheers
Greg Locock
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RE: vibration simulation on assemblies with nonlinear contact, NX nastran
I agree with Greg regarding the suggestion to contact the vendor. They should be able to help you regarding the required licenses and provide a test license so you can test your specific requirements.
But to give you some information anyway.
In NX Nastran there are actuallt three different non-linear transient solutions. The first comes from the original MSC.Nastran code. Since youy mention contact I can say that in my experience the contact capabilities are limited. Basically you have gap elements that handle node-to-node contact. If that works for you I think it is the cheapest option but it is limited.
Then you have the Advanced Nonlinear option (Adina inside NX Nastran). That handles surface-to -surface contact and has several options for this type of analysis. The capabilities are both static and transient. For transient you can either work implicit (SOL601) or explicit (SOL701). I would prefer to use a implicit solver for a vibration problem since explicit is better for short duration analysis. But it depends on you exact requirements. From a licensing point of view the implicit (SOL601) and explicit (SOL701) are in the same package.
The simple way is probably to ask for a 30 day evaluation license and test it.
Good Luck
Thomas
RE: vibration simulation on assemblies with nonlinear contact, NX nastran
after analyzing the requirements of the simulation, we decided to adapt a dynamic explicit method. Now I just need to figure out how to run the simulations cause I read that is quiet tricky to set up an explicit model.
Have a nice day.