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FabianNie
Posts: 7
Registered: ‎03-30-2011
Message 1 of 18 (447 Views)

Dynamic Simulation: How to apply an acceleration?

447 Views, 17 Replies
03-30-2011 08:50 AM

Hi forum,

I know how to apply a force in a dynamic simultion. But how do I apply an acceleration?

 

Thanks for you help,

Fabian

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JDMather
Posts: 28,228
Registered: ‎04-20-2006
Message 2 of 18 (446 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 08:53 AM in reply to: FabianNie

Have you gone through this book?

http://vrblog.info/

Attach your assembly here.

 

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Active Member
FabianNie
Posts: 7
Registered: ‎03-30-2011
Message 3 of 18 (438 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 09:07 AM in reply to: JDMather

Thank you for the answer.

I had a quick look on this website but it doesn't seem to deal with accelerations.

The version I run is Inventor 11, in case this is important

I designed an acceleration sensor carrier and now I would like to see how it deforms if an acceleration is applied. Like putting the carrier on a sled and accelerating the sled. Hope you don't need the assembly to help me.

 

Fabian

 

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JDMather
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Registered: ‎04-20-2006
Message 4 of 18 (434 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 09:16 AM in reply to: FabianNie

FabianNie wrote:

 

I had a quick look on this website but it doesn't seem to deal with accelerations.

 


I have the book right in front of me and there are examples of acceleration

http://www.amazon.com/Running-Autodesk-Inventor-Simulation-Second/dp/0123821029/ref=sr_1_3?ie=UTF8&s...

 

 

Did you open the attachment image in my previous post?

 

Your job might be as simple as adding a Body Load in FEA environment - in which case you don't even need dynamic simulation. (see attached)

 

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swalton
Posts: 1,299
Registered: ‎06-19-2006
Message 5 of 18 (430 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 09:19 AM in reply to: FabianNie

I believe that dynamic simulation is rigid body motion only. 

 

If you want to see deformation, you should use the FEA package. 

 

Create a gravity load and mulitply the stock mangnitude by the #of Gs you want to simulate.




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Active Member
FabianNie
Posts: 7
Registered: ‎03-30-2011
Message 6 of 18 (411 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 10:15 AM in reply to: swalton

JDMather: Sorry, I didn't see the first attached picture. But I did see the second one at once.

 

I quickly drew a part and apply an acceleration. The result is attached. I'm a little confused about the direction. The arrow is pointing from the left to the right. I think the part should bend to the other direction. Is there a way I can do this simulation with an assembly? Or is it like swaltan says a rigid body simulation?

 

Fabian

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JDMather
Posts: 28,228
Registered: ‎04-20-2006
Message 7 of 18 (404 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 10:31 AM in reply to: FabianNie

If you can get to correct forces in dynamic simulation you can then export discrete time steps to analyze FEA at those time steps of interest  (it is not going to dynamically deform while in DS).

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Active Member
FabianNie
Posts: 7
Registered: ‎03-30-2011
Message 8 of 18 (399 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 10:36 AM in reply to: JDMather

But then I do need additional software, right? And is the direction of the acceleration in the picture correct?

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JDMather
Posts: 28,228
Registered: ‎04-20-2006
Message 9 of 18 (392 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 10:50 AM in reply to: FabianNie

FabianNie wrote:

But then I do need additional software, right? And is the direction of the acceleration in the picture correct?


No other software needed if my workflow would work in your application (you should get that book or at least go through all of the built-in tutorials and any YouTube or Skillbuilders you can find on the topic).

 

For your second question I can't really tell anything from that picture.

Can't you build a simplfied dummy assembly or part that illustrates the same behavior of your real work and attach that here?

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Active Member
FabianNie
Posts: 7
Registered: ‎03-30-2011
Message 10 of 18 (387 Views)

Re: Dynamic Simulation: How to apply an acceleration?

03-30-2011 11:04 AM in reply to: JDMather

Just made an example and applied an acceleration on one part. The files are attached.

 

Fabian

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