Multiple Load Cases

Hello,

I understand the use of load cases in patran, if I have to apply loads in x, y and z. rather than doing 3 separate analysis , I can create three load cases and subcases and review the result in each x, y and z load case

What if I want to review the in series of steps rather that individual steps

I apply load in x axis, review the results, then apply the load in y axis, such that x axis load is still on the body.

I do not want to apply all the 3 loads simultaneously, but rather one after another

0 Kiranraj Shetty over 5 years ago

Hi Shaheer,

Looking at your description, I believe you want to perform a noninear analysis with sequential loading.

In a linear analysis such as SOL101, the loadcases will be solved independent of each other.

If you are using a nonlinear solver such SOL106, the subcases are continuous i.e subcase 2 will be applied on the deformed configuration obtained at the end of subcase1 and so on..

If you are using advanced nonlinear solver SOL400, subcases are independent, but the steps are continuous.

In STEP1 if you apply X axis load, and in STEP2 you define load in Y axis, then solution will done as follows,

STEP1 - X axis load will be applied

STEP2 - will use the deformed configuration at end of STEP1 as initial condition, and Y axis loads will be applied.

This is how sequential loading will be defined.

If you want to combine both X axis and Y axis loads in STEP2, please define the loadcase with both loads active in that step. Thus LOAD in STEP2 will call both X axis and Y axis loads.

Regards,

Kiran

Kiranraj Shetty

MSC Tech Support
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