Optistruct ERROR:Not enough memory

ZXG

Hello,

I'm running a NVH model using infinite element and MFOUR method, there is an error: Not enough memory. The Estimated Memory (RAM) for In-Core Solution is only 21583 MB, but the MAXIMUM MEMORY USED is 266791 MB, is this normal?

Is there any other way to reduce memory usage besides reducing the number of elements？ The following are some information and .out file, hope it helps.

Clamp_15KN_1203.out

Rajashri_Saha

In FRF analysis , memory issue appears when

1. Frequency range is high
2. More OUTPUT requests with smaller interval
3. Model size is big
4. Disk space is less
5. Available RAM is small

In your case I can see the frequency range is more and DT mentioned in TSTEP is very less.

Also verify the OUTPUT requests you have asked for.

You can refer the below article too.

Solutions for Insufficient Disk Space Issue of Frequency Response Analysis — Altair Community

Rajashri_Saha

In FRF analysis , memory issue appears when

1. Frequency range is high
2. More OUTPUT requests with smaller interval
3. Model size is big
4. Disk space is less
5. Available RAM is small

In your case I can see the frequency range is more and DT mentioned in TSTEP is very less.

Also verify the OUTPUT requests you have asked for.

You can refer the below article too.

Solutions for Insufficient Disk Space Issue of Frequency Response Analysis — Altair Community

ZXG

I will try it, thank you so much Saha!😀