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FEM (Structure properties (fmax, m, EA, EJ, Mc, Jc, k, r), Frequency…
FEM
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Damping Matrix
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Dumper
idof_rc=idf(node,direction);
R(idof_kc,idof_kc)=R(idof_kc,idof_kc)+Rdumper;
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Check IDB and ndof
Matlab shows a table where you can read the number of each node and degree of freedom in order to understand if all the operation have be done in the correct way
Plotting
FRF
FRF_NOD_DIR = xx(gradodilibertà,:)
PAY ATTENTION!!
gradodilibertà=idl(nodo,direzione)
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VINCOLAR REACTIONS
Partitioning
MCF=M(ndof+1:end,1:ndof);
CCF=C(ndof+1:end,1:ndof);
KCF=K(ndof+1:end,1:ndof);
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FRF_F_C1 = rr(idf(nodo,direzione)-ndf,:)
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