Inventor General Discussion

Inventor General Discussion

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Active Member
maaduk
Posts: 8
Registered: ‎10-05-2012
Message 11 of 15 (250 Views)

Re: Centrifugal force applied to a pendulum in dynamic simulation

10-08-2012 04:33 AM in reply to: maaduk

Please, if you could have a look on attached. This is sort of a assembly with desired proportions. I can not get 2D contact working on this one. Thanks a lot for your help.

*Expert Elite*
JDMather
Posts: 26,658
Registered: ‎04-20-2006
Message 12 of 15 (243 Views)

Re: Centrifugal force applied to a pendulum in dynamic simulation

10-08-2012 08:34 AM in reply to: maaduk

maaduk wrote:

Hi Henderh,

... i get Error message saying: "Error in reading RSe stream" so it won't open them.

Madduk


You are using 2011 while Hugh saved in 2013.  Inventor files are not backward compatible.

I know you stated 2011 in your first post, but you should add this information to your signature.

 

Are you a student?  (students can download 2013 for free from http://www.autodesk.com/edcommunity )

Please mark this response as "Accept as Solution" if it answers your question.
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Active Member
maaduk
Posts: 8
Registered: ‎10-05-2012
Message 13 of 15 (225 Views)

Re: Centrifugal force applied to a pendulum in dynamic simulation

10-08-2012 02:15 PM in reply to: JDMather

Yea, i will add it in there. I thought it might had been something like that. And no, i am not a student any more. I finished university last year. Now i am working for company in London.

Employee
henderh
Posts: 650
Registered: ‎06-07-2007
Message 14 of 15 (220 Views)

Re: Centrifugal force applied to a pendulum in dynamic simulation

10-08-2012 03:20 PM in reply to: maaduk

Hi Maaduk,

 

  The second simulation you posted up looks correct to me.

 As you've shown, the maximum reaction force on the roll head in the rolling joint is computed by DS as ~96.035 kN.

 

  Summing moments about the pivot point of the roll assembly (Revolution:2), and solving for the reaction force on the roll head comes out to be ~105 kN by my rough hand calculation.  (I used the combined CoG of the roll head and roll assembly as the point of application of the centrfugal force)


  I trust the Dynamic Simulation numbers more than my rough hand calculation...and this gives me confidence in both results, since they are somewhat close :smileyhappy:

 

Warm regards, -Hugh

 

[Edit: add photo of hand calc]

 

  



Hugh Henderson
Simulation QA Engineer
DLS
Active Member
maaduk
Posts: 8
Registered: ‎10-05-2012
Message 15 of 15 (217 Views)

Re: Centrifugal force applied to a pendulum in dynamic simulation

10-08-2012 03:29 PM in reply to: henderh

Hi Henderh,

many thanks for your help. All this was about calculating force by which roll head acts on the ring. We are upsizeing existing device and we would like to know if the bearings are big enough. You helped me a lot.

Martin

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