Seismic analysis of pipe
Seismic analysis of pipe
(OP)
Ok, im going to start of saying that i am very new to the program. (as in i just got thrown on my first ansys project this week, and have extremely limited knowledge of the coding) Also, im running V.11.
Im running a seismic analysis on a pipe. The pipe is modeled using PIPE20 elements. I have an input of a time history of acceleration (consisting of 2000 or so accelerations with a time step of 0.01 s. I was able to create a successful array of accelerations (dont know if this is the best way to do this) but when i go to analyze both stresses and strains there is no data there. I also tried ramping up the accelerations by a very large amount but it did not effect the lack of results.
So i guess my ultimate questions are (1), is there an easier/more proper way to input an acceleration time history, and (2), once the solution runs with the acceleration data, how do i go about getting the stress/strain values so that i can ultimately get the strain rate?
Im running a seismic analysis on a pipe. The pipe is modeled using PIPE20 elements. I have an input of a time history of acceleration (consisting of 2000 or so accelerations with a time step of 0.01 s. I was able to create a successful array of accelerations (dont know if this is the best way to do this) but when i go to analyze both stresses and strains there is no data there. I also tried ramping up the accelerations by a very large amount but it did not effect the lack of results.
So i guess my ultimate questions are (1), is there an easier/more proper way to input an acceleration time history, and (2), once the solution runs with the acceleration data, how do i go about getting the stress/strain values so that i can ultimately get the strain rate?





RE: Seismic analysis of pipe
Explain the reason that you are using ANSYS for time-history analysis on a piping system.
There are other USNRC Certified, piping-oriented software programs that will perform time-history anaysis on piping systems, calculate stresses and compare them against piping code allowables. (CAESAR-II for example)
Why ANSYS for this workscope ?
RE: Seismic analysis of pipe
To answer the OP question, search the site for keywords such as "non-linear" "time history" transient" and "seismic" (for example). There is lots of info on how best to undertake non-linear transient analysis in ANSYS on the site.
Cheers.
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