Multiple LoadCases with a factor for consecutive Angle - Reg

Altair Forum User

Hallo,

 

I am having a model of bicycle pedal crank in which I want to apply loads on the pedal ( on the created node). If we take the pedal goes 360degree I want to split the 360 into some lets take 18 steps so I have to create 20 load cases. I considered when the pedal is at top as Top dead center ( TDC) and when it is at bottom Bottom dead center (BDC).  The load which i apply on the tdc is high and when it goes bdc it gets reduce and again to complete one cycle the load goes load just like the real case of pedaling the cycle.

 

I can manually calculate each load case Fx,Fy and Fz component and give accordingly for 20 steps. My question : Is there any other way that giving initial load that is load at TDC Fx,Fy and Fz value and the next consecutive load cases  for the next 20 degree, then 40 degree and so on the value has to decrease ? , Because for 20 steps we can calculate what if there is a component with 1000 loadsteps.  the values of Fx,Fy and Fz cant be calculated manually it will make the person frustrated. So there has to be a way as a factor ( with this initial factor the consecutive load has to change either decrese or increase). Is there a way to give a initial factor or way to implement all other corresponding loads ? It would be much appreiciated if I get any positive response . I have attached  a sample pic of my model with just 4 load cases with certain angle apart. It was easy to do by calcualting Fx,Fy and Fz values. But if i want to implement more loads by dividing 360 by so and so ...

 

Thanks in advance for the response.

 

Kind Regards,

Muthu,.

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Altair Forum User

Hi @muthu62

 

Please check these two scripts:

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<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

@Prakash Pagadala  Hi Prakash /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' /> Thanks for your reply. I will check the script and let you know. Is there any other way other than using scripts for the problem which I mentioned above ? .Thanks .

 

Kind Regards, 

Muthu.

Altair Forum User

Hi @Prakash Pagadala , The scripts you have suggested the first one worked to created loadsteps for each loadcases. I can use that when I have to create multiple loadsteps. but the 2nd one isnt working when i used the scaling factor 2 after selecting all the loads. it just saying scaling , no changes after that .Is there any other method other than scripts ? or I have to go only with the scripts. 

 

For instance let me take 20 load cases I want to give the initial load as 1000 N ( after calculating Fx,Fy and Fz) I have to get the corresponding loads at regular 20 degree intervals with less force. I dont know if it is possible as I have mentioned my problem above. but just waiting to know if there could be anything so that I can use that method for more number of load cases.

 

Thanks for your suggestions before, awaiting for your response /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

 

Kind Regards,

Muthu.

Altair Forum User

Hi @muthu62

 

I will check if there is a way to do this. /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'> 

Altair Forum User

Hii  @Prakash Pagadala  Thanks for your response /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' /> Ok check and let me know , i will also try and I found I will post here /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' /> Awaiting for your response .

 

Kind Regards,

Muthu.