Learning Forum

[Christian Lee]

I am trying to simulate a blade cutting through a pipe. However, I am getting a solver error saying that the energy error is too large. I am very new to this software, so can someone explain to me how to fix this issue. 

[Armin]

Hi Christian,

Please check Lesson 4 of the following course for an overview of energy balance in explicit dynamics analysis: Explicit Dynamics Theory - Ansys Innovation Course - YouTube

Also, check this knowledge material: /knowledge/forums/topic/how-to-deal-with-problem-terminated-energy-error-too-large/

[Alex R.]

Hello Christian, 

In general, too large energy error means that there is an instability in the simulation. Here you can find a great article about energy balance in LS-DYNA: /knowledge/forums/topic/can-you-discuss-energy-balance-for-an-ls-dyna-simulation/

Good place to start is to identify which energy is rising and giving the error. That should give you a hint what is the root of the problem. Please plot energies from GLSTAT – kinetic, internal, hourglass, sliding etc.

Additionally, can you please describe how your setup looks like? What type of elements are you using? Do you have an erosion criterion incorporated in your model for pipe?

Thank you,
Alex