I got confused with this acceleration in the begining. This acceleration applies the centrifugal force. e.g if I apply this acceleration to a plate which is fixed at one end, the result tries to flatten the plate, however I am looking for a twisting effect on the plate. Two are not the same.

Following example explains what I am trying to achieve.

Imagine a rotating shaft with a disc attached at the end. When the shaft starts to rotate the inertia of the disc twists the shaft untill steady state is reached. This is what I am trying to simulate. You are right that I can probably calculate the torque on the shaft to simulate this effect, however I can also apply angular accelration to the system to simulate the same effect. Calculation of applied torque becomes difficult if the model has a more complicated shape, thats where the application of angular acceleration comes handy. I use to adopt this methodology in some of the other FEA softwares, not sure if I can do the same in solidworks.

If I understand you correctly, then you should be able to do it with a centrifugal load. For example, I made a shaft with a disk at the end and applied a 10 rad/s^2 acceleration with respect to Axis 1 (the shaft's axis). I get both angular and radial deflections.

Ah, I see what's wrong. You have defined an angular velocity, but to get the shaft rotation you need to have an agular acceleration. If you set the angular velocity to 0 and the angular acceleration to some value, then you'll get a deflection shape like mine.

Shaun,

I got confused with this acceleration in the begining. This acceleration applies the centrifugal force. e.g if I apply this acceleration to a plate which is fixed at one end, the result tries to flatten the plate, however I am looking for a twisting effect on the plate. Two are not the same.

Jaspreet Hothi

Hmmm, sounds like you want to apply a moment/torque. Can you provide a diagram of what you want to do?

Following example explains what I am trying to achieve.

Imagine a rotating shaft with a disc attached at the end. When the shaft starts to rotate the inertia of the disc twists the shaft untill steady state is reached. This is what I am trying to simulate. You are right that I can probably calculate the torque on the shaft to simulate this effect, however I can also apply angular accelration to the system to simulate the same effect. Calculation of applied torque becomes difficult if the model has a more complicated shape, thats where the application of angular acceleration comes handy. I use to adopt this methodology in some of the other FEA softwares, not sure if I can do the same in solidworks.

Regards,

Jaspreet Hothi

If I understand you correctly, then you should be able to do it with a centrifugal load. For example, I made a shaft with a disk at the end and applied a 10 rad/s^2 acceleration with respect to Axis 1 (the shaft's axis). I get both angular and radial deflections.

Thats strange! I am not getting any rotation at all. I am attaching the model I used, can you please take a look.

Thanks for your help.

Jaspreet Hothi

## Attachments

Ah, I see what's wrong. You have defined an angular velocity, but to get the shaft rotation you need to have an agular acceleration. If you set the angular velocity to 0 and the angular acceleration to some value, then you'll get a deflection shape like mine.

I see the rotation . Thanks.

Jaspreet Hothi