Tire size in wizard

Altair Forum User

Hi,

 

my name is Javier and I´m from Spain.

 I´m currently the dynamics system manager in Formula URJC ( Formula Student team) and I´m using the templates to design our next suspension system. But I have a problem with the template. It seems like the tire in the template is not 13'' because the wheel centre point is in the 262.64 coordinate in Z axle. We are using Hoosier 13'' wheels and I need to change the body radius, because if I change this coordinate, the only change that appears is in the point not in the wheel size. How could I change the wheel size?

 

Ok, now I want to take advantage of the opportunity and ask another question. I have already seen the tutorial about how to input a target for the suspension system design, so here is my question:

What happen if I achieve a target with the optimization and then I want to achieve another target but this one may change the first one? Does an error appear? Or does the program calculate a compromise solution?

 

Thanks!

 

Javier

Altair Forum User

Hi @JaviFUJC

 

Did you check AutoTire?

 

Autotire allows to change tire properties

Altair Forum User

Altair Forum User said:

Ok, now I want to take advantage of the opportunity and ask another question. I have already seen the tutorial about how to input a target for the suspension system design, so here is my question:

 

Could you please point me to the tutorial?

 

Altair Forum User

Hi, 

 

No I did not try with AutoTire, in fact I did not know this tool. But I have searched for this and I did not found it. 

When I click on the wheel in the template I am editing to test my suspension geometry there is no option to modify the wheel´s radius (see attached image). How could I change the radius in the template?

 

 

And the tutorial I was talking about is this I show below:

https://altairuniversity.com/vehicle-library-user-guide/

 

Thanks! 

Kind Regards

Javier

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

Altair Forum User

Hi,

 

 

please I need it ASAP because I´m going to delay my team goals. 

 

Thank you.

 

Javier

 

Altair Forum User

Hi javier,

 

Please follow the doc.

Unable to find an attachment - read this blog

Altair Forum User

Thank you very much ! @Prakash Pagadala

 

Best Regards,

 

Javier

 

Altair Forum User

Hi @Prakash Pagadala, 

 

I think this will be my last doubt about this.. but I have a problem when I use AutoTire. 

The problem is that I want to change the radius of the wheel in the template, so I used like u suggested me AutoTire (I deleted the old wheel body and added AutoTire). 

Then I inserted the parameters of the wheel and the coordinates of the wheel center. But my problem now is that I don´t know how can I adjust the conexions between the template and the new wheels, and when I try to run the model, the next errors appear in the screen (attached image)

I know there is something wrong because as you can see the ground is not in contact with the wheel surface and I think I need to stablish more conections. 

Do you know how to do this or do you think is better to me to try the motion study of the suspension with the template (because maybe the wheel size does not affect the results)?

Please help me I´m using a lot of time in this issue...

 

Kind Regards

 

Javier

 

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

Altair Forum User

Hi,

 

Right click on Model in and you will see an option called Apply Attachment candidates. Click that and check again,

 

If that doesn't help, please share the model file. 

 

Please use the file transfer link in my signature to share the model file

Altair Forum User

Hi @Prakash Pagadala,

 

I tried this that you just said and does not work. And I tried too to attach a fix joint between the wheel and wheel hub, or the jack and wheel but it´s not possible.

I attach the model in you file transfer link.

 

Thank you very much.

 

Javier

Altair Forum User

Hi @JaviFUJC

 

Some joints have missing bodies. Please check and assign right bodies.