Civil Engineering Reference
In-Depth Information
New scalar integers:
iflag
−
no start vector specified, set to
1
iters
number of Lanczos iterations
equals zero if eigenvectors computed properly
jflag
Lanczos iteration ceiling
lalfa
maximum number of eigenvalues in range
leig
unit number for diagnostic messages
lp
set to at least
3*leig
lx
holds first dimension of array
z
lz
holds the number of eigenvalues in
eig
neig
number of stress (strain) terms
nst
New scalar reals:
acc
convergence tolerance relative to largest eigenvalue
determinant of the Jacobian matrix
det
lower limit of eigenvalue spectrum
el
upper limit of eigenvalue spectrum
er
New dynamic integer arrays:
jeig
used to get the eigenvectors
nu
working array
New dynamic real arrays:
alfa
working array holding Lanczos tridiagonal matrix
bee
strain-displacement matrix
beta
working array holding Lanczos tridiagonal matrix
dee
stress-strain matrix
del
working array
der
shape function derivatives with respect to local coordinates
deriv
shape function derivatives with respect to global coordinates
ecm
Gauss point contribution to consistent mass matrix
eig
holds the computed eigenvalues in increasing order
fun
shape functions
jac
Jacobian matrix
kb
global stiffness matrix
mb
global mass matrix
points
integrating point local coordinates
ua
working space vector
udiag
eigenvector
va
working space vector
v
store
holds the Lanczos vectors
weights
weighting coefficients
w1
working vector
x
working space vector
y
working space vector
z
working space vector
