Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › How to carry out a transient analysis following on from a static analysis in ANSYS Mechanical APDL? › Reply To: How to carry out a transient analysis following on from a static analysis in ANSYS Mechanical APDL?
July 22, 2021 at 6:33 am
Erik Kostson
Ansys Employee
HI
You should use transient for all analysis (as you saw one can not switch), and in the first say one or two steps do not have a time integration (TIMINT command), which basically results in a static solution. AFter that in the last step you can turn them on and add dynamic loads as needed.
Below is an example of what I meant:
/SOLU
ANTYPE,TRANS
TRNOPT,FULL
TIMINT,OFF,ALL ! static solution no mass matrix and dynamic effects
TIME,1
DELTIM,0.1,0.1,0.1
SOLVE
ANTYPE,TRANS ! second step with integration and dynamic effects on so transient dynamic solution
TRNOPT,FULL
TIMINT,ON,ALL ! dynamic solution on
...
....
TIME,2
DELTIM,0.1,0.1,0.1
OUTRES,ALL,ALL
SOLVE
ANTYPE,TRANS
TRNOPT,FULL
TIMINT,ON,ALL ! dynamic solution on / transient effects
D,1,ALL,0
....
....
DELTIM,0.002,0.002,0.002
OUTRES,ALL,ALL
SOLVE
You should use transient for all analysis (as you saw one can not switch), and in the first say one or two steps do not have a time integration (TIMINT command), which basically results in a static solution. AFter that in the last step you can turn them on and add dynamic loads as needed.
Below is an example of what I meant:
/SOLU
ANTYPE,TRANS
TRNOPT,FULL
TIMINT,OFF,ALL ! static solution no mass matrix and dynamic effects
TIME,1
DELTIM,0.1,0.1,0.1
SOLVE
ANTYPE,TRANS ! second step with integration and dynamic effects on so transient dynamic solution
TRNOPT,FULL
TIMINT,ON,ALL ! dynamic solution on
...
....
TIME,2
DELTIM,0.1,0.1,0.1
OUTRES,ALL,ALL
SOLVE
ANTYPE,TRANS
TRNOPT,FULL
TIMINT,ON,ALL ! dynamic solution on / transient effects
D,1,ALL,0
....
....
DELTIM,0.002,0.002,0.002
OUTRES,ALL,ALL
SOLVE