9.3 STATIC CONDENSATION

An application of FEM to a problem results in simultaneous equation set

 

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If size of K is too large to fit into the CPU memory of the computer at hand, it is necessary to reduce the size of the matrix to solve the problem. Static condensation is a process of eliminating or condensing some unknown DOF (known as secondary or slave DOF) and re-cast the original Eq. set (9.1) in terms of fewer unknowns (termed as primary unknowns or master DOF).

 

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Figure 9.3 Further reduction in the size of the problem

 

Table 9.1 (a) ...

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