Spring contact in modal analysis

[Anonymous]

Hello Community,

i try to find out the natural vibrational frequencies of a clutch in modal analysis.

I know the stiffness of the clutch but not the material. So i decide that i define the stiffness of the clutch bei the contact: Spring.

Because i want to find out the rotational frequency, the vertical stiffness has no importance and i define the vertical stiffness as zero.

Now my problem is, that i have the clutch stiffness in Nm/rad and the tangential stiffness in Inventor has the unit N/mm.

Is it importent to convert the Nm/rad in N/mm? And how does it work?

Or does Inventor convert the tangential stiffness alone, when it simulate ja rotational frequency.

Thanks in advance!

Philipp Riemer

[Anonymous]

Hello Community,

i try to find out the natural vibrational frequencies of a clutch in modal analysis.

I know the stiffness of the clutch but not the material. So i decide that i define the stiffness of the clutch bei the contact: Spring.

Because i want to find out the rotational frequency, the vertical stiffness has no importance and i define the vertical stiffness as zero.

Now my problem is, that i have the clutch stiffness in Nm/rad and the tangential stiffness in Inventor has the unit N/mm.

Is it importent to convert the Nm/rad in N/mm? And how does it work?

Or does Inventor convert the tangential stiffness alone, when it simulate ja rotational frequency.

Thanks in advance!

Philipp Riemer