Is anyone used XYPEAK,XYPLOT,STRESS,PSDF/ EID () Output request for a 3D element?

Ayyappa_J

Hello Everyone,

I am currently working on Random response analysis that involves 3D elements, and I need to understand how to effectively use these output requests to analyze my results. Specifically, I am looking for guidance on:

1. The proper syntax and setup for these XYPLOT output requests in the input file.
2. Examples of how these requests can be applied to 3D elements.
3. Any common issues to watch out for when using these output requests.
4. Best practices for interpreting the results obtained from these requests.

Any insights, examples, or references to documentation would be greatly appreciated. Thank you!

solon

Hello,

https://2025.help.altair.com/2025.1/hwsolvers/os/topics/solvers/os/xypeak_xyplot_xypunch_io_r.htm

-XYPEAK: Generates a .peak file containing a summary of the requested output for random response analysis

-XYPLOT: Generates a HyperGraph session file & related data files for the requested output for random response analysis.•

-XYPUNCH: Generates a .pch file for the requested output for random response analysis.•

Plot Types:

•PSDF: Requests power spectral density function for random response analysis

•AUTO: Requests autocorrelation for random response analysis.•

Curve Type:

•DISP: Requests output for displacement.•VELO: Requests output for velocity.•ACCE: Requests output for acceleration.•FORCE: Requests output for force.•STRESS: Requests output for element stress.STRAIN: Requests output for element strain

for example:

We extract the imaginary stress normal to x-axis for ID= 101 and 102 solid elements with the following command:

XYPLOT, STRESS, PSDF/ 101(12), 102(12)

In the link bellow you can find all the available codes for solid elements:

https://help.altair.com/hwsolvers/os/topics/solvers/os/dresp1_freq_response_stress_strain_bulk_r.htm#dresp1_freq_response_stress_strain_bulk_r