Learning Forum

[Sudhakara G]

Hi,

The geared rotor is supported on the journal bearings on either side. I would like to estimate the expansion of gearwheel under various speeds. 

Is it ok to use cylindrical support as B.C (boundary condition) in the region of journal bearing?

 

Thanks,

Sudhakara

 

[Ashish Khemka]

Hi,

You can try defining bearings: 9.12. Bearings (ansys.com)

Regards,

Ashish Khemka

[Sudhakara G]

Hi,

I have carried out the analysis with cylindrical supports – the expansion is 90 microns.

The same analysis with journal bearing (with stiffness & damping properties ) gave 220 microns of expansion.

I am not able to comprehend the deviation in results.

Please clarify, which support is correct.

 

Regards,

Sudhakara

 

[Ashish Khemka]

Hi,

Did you turn on the large deflection? If not then please try turning on the large deflection under analysis settings.

Regards,

Ashish Khemka