design frame for motorcycle and related loads that must endure

[cacciatorino]

as a child or a little more I read "mototechnics", which dealt with the arguments in a very thorough manner. Maybe it's useful to do a research in the magazine's archive.

 

[A.V.9]

as a child or a little more I read "mototechnics", which dealt with the arguments in a very thorough manner. Maybe it's useful to do a research in the magazine's archive.

I know, but I've never had the honor of seeing one of them the archive you're talking about on the internet? ?

 

[A.V.9]

As for the value to be applied at this torque moment I would put myself in the worst conditions, i.e. I would consider to incite the weight of the full wheel + pilot and passenger and I would apply this value as a transversal force in the contact point of the front wheel to the ground.. This force multiplied by the distance between the steering column and the contact point of the wheel to the ground gives us the torque moment to be applied......... take into account that the torque stiffness is a very important factor for a motorcycle. track motorcycles must have a very high torsion stiffness while cross bikes can afford a lower torsion stiffness. . .
Now if you want to design healthy plant structure you should use fem software.... . If you want to make calculations by hand, it's long, but you can do the same..... with fem software you have to assign the sections (see some motorcycles around) and then check the results with subsequent optimization completely

since I am not familiar with the fem programmes (who are they piu semplici da usare) I would also like to do hand calculations but I don't know where to start Dove potreme documentarmi??

 

[peloritano]

I don't believe anywhere.... do a sketch with lines representing the frame tubes and apply the loads... you will get a hyperstatic structure and with a bit of construction science should be solved. . .
to simplify some things I would consider half the frame with the applied forces and the hinge constraints all considered in a plane, once the structure resolved I would make a sizing of the frame considering applied half of the torque moment that presses the structure... .
I would not put any reinforcement brackets.... in this way you will have a sizing of the structure enough to resist the applied stresses and therefore indeed if you were to build the frame the reinforcement brackets would definitely favor a greater resistance of the structure

 

[peloritano]

I wrote wrong.... the constraints should be zipper trolley

 

[sampom]

I know, but I've never had the honor of seeing one of them the archive you're talking about on the internet? ?

Yes, but there is no mention of prehistory:biggrin:
It's still published, you find it in the newsstand.

greetings
Marco:smile:

 

[peloritano]

I must also have the copy where we were talking about a past frame at the fem... If I don't remember badly it was a 125 nsr wave from the street... .

 

[sampom]

I know, but I've never had the honor of seeing one of them the archive you're talking about on the internet? ?

if you have patience try to search:http://www.supermototecnica.com/greetings
Marco:smile:

 

[peloritano]

http://shop.nuoviperiodicimilanesi.com/product_info.php?products_id=1027

 

[A.V.9]

I don't believe anywhere.... do a sketch with lines representing the frame tubes and apply the loads... you will get a hyperstatic structure and with a bit of construction science should be solved. . .
to simplify some things I would consider half the frame with the applied forces and the hinge constraints all considered in a plane, once the structure resolved I would make a sizing of the frame considering applied half of the torque moment that presses the structure... .
I would not put any reinforcement brackets.... in this way you will have a sizing of the structure enough to resist the applied stresses and therefore indeed if you were to build the frame the reinforcement brackets would definitely favor a greater resistance of the structure

I understand but my problem and that I do not have a frame as you drew but I have a perimeter frame with double beam and it does not result a flat frame

 

[A.V.9]

http://shop.nuoviperiodicimilanesi.com/product_info.php?products_id=1027

interesting

 

[stefano.tag]

How do the jobs work? a.v.9 wanted to ask you something.. That book you bought on the motorcycle dynamics... does not explain how to dimensional a frame to large lines? I'd like to take it myself and ask myself what he's talking about. . .

 

[stefano.tag]

http://people.mecc.polimi.it/gobbi/po/po_es5.pdfI just don't think it's a crappy thing to do with you.