Tightening torque problem

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1

Hi all

I would like to apply a tightening torque on a screw but I don't understand the unit indicated by solidworks. Indeed I would like to apply a torque of 0.91 N.m and solidworks offers me as a unit of (N.m)^2/Hz. Does anyone have a conversion rule to tell me? Or maybe I'm not using the right function? (I used the Force/Torque function)

Below is the image of the function that I am having trouble with.

P.S: can we apply torque to an axle connection?

2

Hello

so there in the table the torque is related to a rotation frequency (hz) and the N/m^2 c is the pascals

I don't use the function but already devellope the tabs and see if we can pass it in static

 

http://jim.or.jp/INFO/SI-Units.pdf

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3
Hello, what is the goal? Because the torque function is only used for simulation, for example for a motor (rotational speed), is that the goal?

http://help.solidworks.com/2012/French/SolidWorks/cworks/IDC_HELP_LOAD_FORCE.htm

You can't really apply torque in SolidWorks.

Maybe use this type of connector instead:

http://help.solidworks.com/2013/french/SolidWorks/cworks/c_bolt_connectors.htm

4

In a bolt-type connection, you can add a preload (see attached image). if that's what you're looking for.


2015-05-20__connecteur_simu.jpg
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5

Hello

This type of unit is generally found in dynamic analyses. As a result, it may not be the right function or the simulation mode is not the right one.

On the other hand, what is actually the desired goal. The result of a torque tightening is a prestressing force (which can be determined by analytical calculation). The couple disappears as soon as you remove the key!

 

6

I don't use this feature either. But did you try to change the "IF" just above where the yellow rule is? It should logically evolve your units

7

Hello everyone, thank you for your answers. I need to see the evolution of my dynamic random vibration study if I don't apply the same tightening torque on my screws. For example, I would like to see what happens on the eigenmodes as well as on the spectral density, if I apply a torque of 0.90 N.m on 50% of my screws and if I apply a torque of 0.45 N.m on the other 50%. To do this I thought I could apply a torque to the head of my screws/axle connections. My problem is that I don't understand the proposed unit, the torques are in (N.m)^2/Hz and the forces are in N/Hz. PS: I don't think I have access to bolt type connections because I'm on a dynamic study.