When we are specifying the transient analysis method in ansys mechanical Apdl using 'TRNOPT' we are specifying the methods FULL, reduced,mode superposition and variational technology method.
Can any one help me in under standing what this means.And what is the difference between these methods
In Full method, the equations of motion are solved using the full mass and stiffness matrices.
Reduced method: Reduces the size of mass and stiffness matrices. There are many methods to reduce mass and stiffness matrices. I am not sure which one Ansys uses.
In superposition, first modal analysis is done. Next, the response for each of the first few modes is calculated and then they are superiposed.
Clearly, the first method is naturally more accurate. But, it is by far more time consuming.
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