Learning Forum

[Aneesah Nabi]

Hi, trying to model a train going over a bridge. Want to use these values for the time steps etc but Ansys won't validate them. Any idea of what I'm doing wrong or how to get around it?

[Sampat Kumar]

Hello Aneesah,
Why do you wnat to use the 230 steps to simulate the result? Have you imported this time from external file in ansys? 
Meanwhile, Can you search on youtube with this keyword “Transient Structural Analysis (Multi Time Step) in Ansys | Lesson 25” to understand it in the details. 

Best Regards,
Sampat

 

[Aneesah Nabi]

I have 230 steps in my transient loading each with a time difference of 0.014182s. Is that not how you do it? I followed the YouTube instructions but if I have 230 steps won't I have to do do each step setup manually?

[Sampat Kumar]

Hello Aneesah,
You can perform the simulation with the 230 steps also but in this case, you have to change the current step number setting in every step which would be time-consuming. 
I would suggest performing the simulation in the less number of steps and using the time steps as defined in the video. 
Come to your question- "Want to use these values for the time steps etc but Ansys won't validate them" Can you explain a little what you mean by "Ansys won't validate them"? I can see you applied the boundary conditions but not for full-time steps till 3.24sec, it ended up early. 
Best Regards,
Sampat

[Aneesah Nabi]

Thank you, I'll use less steps and see how it works. When I was inputting my values as above the solver wouldn't run and the settings had a question mark in front. However, I believe that is partially because of what you mentioned where I haven't input for all 230 steps. No worries, I'll reduce the steps and see how it works out. Thank you!

[Sampat Kumar]

 Including a screenshot of the question marks would be helpful for better understanding. There might also be other contributing factors.

Could you try modifying the current step number to a value between 1 and 230? This will help us identify if the yellow color highlights in the analysis details change based on the step number. If it highlights yellow color then details are not filled in the setting completely.