How to apply and include acceleration in the simulation?

Vikas_22008

I am trying to do a non-linear static analysis of an assembly. I am applying 2 point forces of 148.080N and 7.8N at 2 different locations. I also want to apply acceleration of 10x9.81m/s2 (or 10 x 9810mm/s2) as a BC to the model.  I do not know how to apply acceleration and also do not know how to include that in the LOADADD along with the other 2 loads (148.080N and 7.8N). 

FYI
I cannot upload any documents on the requests.

Kind regards

Vikas

Paulo Libório

Hey Vikas,

To create Gravity Load, use the drop down arrow beside the "Body Accelerations" tool

This will be valid for every node of your model.

The LOADADD card can be created in the Load Collectors browser by Right-Click > Create > LOADADD

Please visit the help for more information:

• ACCEL2 - Defines static acceleration loads at a specific SET of GRID points in the model.
• GRAV - Defines the gravity vectors for use in determining gravity loading for the static structural model.
• LOADADD - Defines a static load as a linear combination of load sets.

Kind regards,
Paulo Libório.

Paulo Libório

Hey Vikas,

To create Gravity Load, use the drop down arrow beside the "Body Accelerations" tool

This will be valid for every node of your model.

The LOADADD card can be created in the Load Collectors browser by Right-Click > Create > LOADADD

Please visit the help for more information:

• ACCEL2 - Defines static acceleration loads at a specific SET of GRID points in the model.
• GRAV - Defines the gravity vectors for use in determining gravity loading for the static structural model.
• LOADADD - Defines a static load as a linear combination of load sets.

Kind regards,
Paulo Libório.

Vikas_22008

Paulo Libório said:

Hey Vikas,

To create Gravity Load, use the drop down arrow beside the "Body Accelerations" tool

This will be valid for every node of your model.

The LOADADD card can be created in the Load Collectors browser by Right-Click > Create > LOADADD

Please visit the help for more information:

• ACCEL2 - Defines static acceleration loads at a specific SET of GRID points in the model.
• GRAV - Defines the gravity vectors for use in determining gravity loading for the static structural model.
• LOADADD - Defines a static load as a linear combination of load sets.

Kind regards,
Paulo Libório.

Thank you Paulo. That was very helpful. 

Now, can i combine all the 3 loads (-981000mm/s2, 148.080N, and 7.8N) in the LOADADD loadcollector and use this LOADADD in the load step to simulate the model?

Paulo Libório

Vikas_22008 said:

Thank you Paulo. That was very helpful. 

Now, can i combine all the 3 loads (-981000mm/s2, 148.080N, and 7.8N) in the LOADADD loadcollector and use this LOADADD in the load step to simulate the model?

Exactly,

GRAV should be used in the LOAD entry of a SUBCASE. Since you have 3 different collectors for your loads, combine them into one LOADADD and reference it in the subcase definition.

Vikas_22008

Paulo Libório said:

Exactly,

GRAV should be used in the LOAD entry of a SUBCASE. Since you have 3 different collectors for your loads, combine them into one LOADADD and reference it in the subcase definition.

Thanks again for your support

Vikas_22008

Hallo Paulo,

how do i output the accelerations and check in the hyperview?

Kind regards

Vikas M B

Paulo Libório

Vikas_22008 said:

Hallo Paulo,

how do i output the accelerations and check in the hyperview?

Kind regards

Vikas M B

Hey Vikas,

You can either create a GLOBAL_OUTPUT_REQUEST, checking the ACCELERATION option:

or go to the load step definition, under OUTPUT -> ACCELERATION:

The difference is that GLOBAL_OUTPUT_REQUEST will output whatever boxes you check for every load step in your model. But if you'd like different output requests depending on the load step, you should use the OUTPUT option in its definition.

Best regards,
Paulo Libório.

Vikas_22008

Paulo Libório said:

Hey Vikas,

You can either create a GLOBAL_OUTPUT_REQUEST, checking the ACCELERATION option:

or go to the load step definition, under OUTPUT -> ACCELERATION:

The difference is that GLOBAL_OUTPUT_REQUEST will output whatever boxes you check for every load step in your model. But if you'd like different output requests depending on the load step, you should use the OUTPUT option in its definition.

Best regards,
Paulo Libório.

Thanks again Paulo