Define two load cards in for one subcase.

[jomocas]

Hi,

I need to ask for two different LOAD cards in one subcase calculation. I tried separating them by commas and putting them in different lines (like shown in the following code) and none of them worked.

I really need to define it separately because I have like 200 subcases and if I merge them together it would take me very long.

I would like to know if this is possible and how to do it.

SUBCASE 1
SUBTITLE=LC1- GROUND (propellant loading) - reverse pressure - v1
LOAD=111
LOAD=112
TEMP=9999
SPC=500
DISP(PLOT)=ALL
STRESS(PLOT)=ALL

Thanks in advance,

Jose

 

[dwallace1971]

Is this a linear or non-linear analysis?

"On the human scale, the laws of Newtonian Physics are non-negotiable"

 

[jomocas]

Hi dwallace1971,

Thanks for your reply,

It's a linear analysis. SOL 101. I have seen in the manual it can be done with SUBCOM, but this involves also quite a lot of work to do. I have the LOAD IDs already defined, I just have to be able to add two different LOAD IDs to the SUBCASE. SUBCOM would do the job but it would be very messy, having so many Subcases and Subcoms...

Do you know what I mean? I just want to do what I posted before (code), but if I do it like that, Nastran only reads the first LOAD. I want Nastran to read both, but I don't know how I should introduce it...

Thanks,

Jose

 

[dwallace1971]

Can you simply combine the load cases in your post-processor? If your constraints are the same, and you're running a linear analysis, you should be able to run the individual subcases then combine them in any combination in your post-processor.

"On the human scale, the laws of Newtonian Physics are non-negotiable"

 

[jomocas]

What do you mean by combine them? I am using Patran 2010.

Thanks

 

[hezhj2000]

I think what dwallace1971 meant is that you run simulations with multiple subcases, each with a LOAD subcase card, and do the combination in Patran.

If I were you, I would rather try this way. Define a single LOAD subcase with a new ID. And in the bulk data section, define a new LOAD card to combine the forces. So your Nastran file will look like.

Subcase 1
Load = 1001
Begin Bulk
Load,1001,1.0,1.0,111,1.0,222