Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

Boundary Condition and Run Time

Hello,

I am doing Stack load analysis of a bottle where a bottle kept under constant load of 80 or 100 kg for 24 hrs. I have to check bottle behavior at 24th hour.

1.How to do this analysis?

2.Which loading condition can be used?

3. What will be the Run Time?

when i kept run time 7 sec , it took ! hr 15 min for analysis. Then how is it possible to run 24 hr test trail

Please suggest.....

Find more posts tagged with

English

OptiStruct

Accepted answers

All comments

Altair Forum User

Hi,

This is a transient load case and you can try the same in OptiStruct.

I recommend you to go through OS-1310: Direct Transient Dynamic Analysis of a Bracket in the Help Menu which demonstrate performing direct transient analysis using OptiStruct.

Altair Forum User

Harsha,

The calculation time will be very huge for a 24hr simulation.

If there is material non-linearity involved you have to run non linear transient analysis and this further increases the simulation time.

gopal_rathore

Hi,

Is not this a simple static case as the force is not varying and based on static results further loadcase can be decided?

Harsh2610

Hello George

Hello Prakash,

I am trying this in optistruct with reference of Tutorial OS-1310 as suggested by George. But how to decide time step values for my 24 hrs trail. I am still confused whether i get result for 24th hr or not?

Harsh2610

Hi,

Is not this a simple static case as the force is not varying and based on static results further loadcase can be decided?

can u please explain?

gopal_rathore

can u please explain?

As the simulation time is 24 hrs which is too long to simulate and as there is on variation in load , we can take it as static case and if stress and displacements are coming high enough, further load case can be decided.