Matrix Format to Solve [A]{x} = {B}
where: [A] = Stiffness Matrix {B} = Right-Hand Side Files (ASCII Format) contain: K.INFO : number of equations and coefficients K.DIAG : diagonal terms K.PTRS : number of (off- diagonal) coefficients in each row K11.INDXS : column location of each coefficient K11.COEFS : (off-diagonal) coefficients in row format K.RHS : Right-Hand Side (Load vector) 6x6 Example (see also 3x3 example with solution) 1 2 3 4 5 6 1 | 100 1 2 5 | | X1 | | 201 | 2 | 200 6 7 9 | | X2 | | 202 | 3 | 300 10 11 12 | | X3 | | 203 | A = 4 | 400 13 14 | | X4 | = | 204 | 5 | 500 15 | | X5 | | 205 | 6 | 600 | | X6 | | 206 | NUMBER OF EQUATIONS = 6 NUMBER OF COEFFICIENTS = 12 K.INFO = JUNK,JUNK,JUNK,NEQ,NEQ,NONZT,JUNK,JUNK, JNUK,JUNK 0,0,0,6,6,12,0,0,0,0 K.DIAG = { 100, 200, 300, 400, 500, 600} K.PTRS = { 3, 3, 3, 2, 1, 0} K11.INDXS = { 2, 3, 6, 3, 4, 6, 4, 5, 6, 5, 6, 6} K11.COEFS = { 1, 2, 5, 6, 7, 9, 10,11,12, 13,14, 15} K.RHS = { 201, 202, 203, 204, 205, 206}* K.INFO User Options ( 0 is default )
iprnt>0 Write solutions to file fort.16
iplot>0 Plots Matrices (on UNIX computers)
isolid>0 Speed solution for solid elements
nrhs>1 Number of right-hand sides (RHS) stacked in K.RHS
MB=30 Real Memory (MegaBytes) available (PC only)