Rod Stability

Altair Forum User

Good evening,

I am working on my aerospace engineering final project consisting of a flight control system. As you can see from the picture attached, I am using motionview to model a series of  rods connected with several joints.

My teacher asked me to write a script to make hyperworks automatically analize rod's stability. In particular, the following expression should not exceed a known value:

 

F = (pi)^2 E I /(L^2)

where 'L' is the lenght of the singular rod and 'I' is the minimum moment of inertia.

 

To sum up, I need motionview to read the lenght and the moment of inertia of each rod and to check the value of 'F'

 

This is the first time I use motionview for this scop so I don't really know what I should do.

I would be greatful if anyone could help me

 

thank you in advance for your help

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Altair Forum User

Hi @s211878

 

Altair Forum User said:

To sum up, I need motionview to read the lenght and the moment of inertia of each rod and to check the value of 'F'

 

Can you explain what do you mean by reading length and MI?

 

If you have CAD geometry, MV will calculate MI within MV. 

 

 

Do you need a script when used should ask for these parameters (pi)^2 E I /(L^2) and calculate F?

Altair Forum User

Altair Forum User said:

Hi @s211878

 

Can you explain what do you mean by reading length and MI?

 

If you have CAD geometry, MV will calculate MI within MV. 

 

 

Do you need a script when used should ask for these parameters (pi)^2 E I /(L^2) and calculate F?

Good morning and thank you for your answer

I need a script to calculate F for each rod modeled in motionview

the script should:

1. calculate MI and length of the rods

2. calculate F for each rod (or at least for the longest rod)

3. check if F is greater then a given value (or simply display F)

 

I apologize if this is not clear

 

thank you for your help

Dario

Altair Forum User

Thank you @s211878

 

I will check and update to you soon. /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'> 

Altair Forum User

Altair Forum User said:

Thank you @s211878

 

I will check and update to you soon. /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' /> 

Hi Prakash

 

any news?

Altair Forum User

Hi,

 

So far I could not find a script or subroutine.