Help!!! The correct way to apply acceleration
Help!!! The correct way to apply acceleration
(OP)
Hi, folks
I have been puzzled by this problem for a long time:
Which way is right?
1. Apply the acceleration on a group of nodes only.
*nset, nset=inputnode
1,2,3,4,5
*boundary, type=acceleration,amplitude=??
inputnode,1,1,9.81
2. Apply the acceleration on the same group of nodes but also included elements which the nodes belongs to.
*nset, nset=inputnode
1,2,3,4,5
*elset,elset=inputnode
10,11,12,13,14
*boundary, type=acceleration,amplitude=??
inputnode,1,1,9.81
(the node 1 to 5 are in element 10 to 14)
The result is quite different!!!
I have been puzzled by this problem for a long time:
Which way is right?
1. Apply the acceleration on a group of nodes only.
*nset, nset=inputnode
1,2,3,4,5
*boundary, type=acceleration,amplitude=??
inputnode,1,1,9.81
2. Apply the acceleration on the same group of nodes but also included elements which the nodes belongs to.
*nset, nset=inputnode
1,2,3,4,5
*elset,elset=inputnode
10,11,12,13,14
*boundary, type=acceleration,amplitude=??
inputnode,1,1,9.81
(the node 1 to 5 are in element 10 to 14)
The result is quite different!!!





RE: Help!!! The correct way to apply acceleration
corus
RE: Help!!! The correct way to apply acceleration
A good source is always the ABAQUS manual:
*BOUNDARY
Specify boundary conditions.
This option is used to prescribe boundary conditions at nodes or to specify the driven nodes in a submodeling analysis. In ABAQUS/Standard it is also used to define primary and secondary bases for modal superposition procedures.
This means you cannot apply acc. at elements by using *Boundary. Therefore results for version 1&2 must be the same.
Seems you're having a gravity problem. Please check out *DLOAD with gravity (GRAV) loading.
Pam