delta200
Mechanical
- Feb 13, 2008
- 3
Hello!
I ve been running some modal analyses on a 64 bit windows7 notebook. I have two models (~800 000 dof), one model is a bit smaller (less than 1%). Have no problems runnig both on the old 32-bit XP-machine. On the 64-bits the first (smaller) model analysis is completed only after 13 minutes, almost all the memory (8Gb) is used during the analysis.
The second analysis on a bigger model on 64-bit freeses on the eigenfrequency solution after sparce decomposition (uses 99% of memory & page file) and nothing happens for hours (I never get "ejgenfrequency extraction" in the NX-window).
I run all the default parameters on the NX Nastran v7.0 (including memory=estimate)
I tried to increase the page file from 8 GB to 15 GB - no result. The 32-bit with only 4GB RAM and 4GB page file however works fine for both models.
Any ideas what is causing the problem?
Thanks in advance!
I ve been running some modal analyses on a 64 bit windows7 notebook. I have two models (~800 000 dof), one model is a bit smaller (less than 1%). Have no problems runnig both on the old 32-bit XP-machine. On the 64-bits the first (smaller) model analysis is completed only after 13 minutes, almost all the memory (8Gb) is used during the analysis.
The second analysis on a bigger model on 64-bit freeses on the eigenfrequency solution after sparce decomposition (uses 99% of memory & page file) and nothing happens for hours (I never get "ejgenfrequency extraction" in the NX-window).
I run all the default parameters on the NX Nastran v7.0 (including memory=estimate)
I tried to increase the page file from 8 GB to 15 GB - no result. The 32-bit with only 4GB RAM and 4GB page file however works fine for both models.
Any ideas what is causing the problem?
Thanks in advance!
