femCalc - Cyl4

CYL4, $l$ , $R_{0}$ , $h_{0}$ , $ε$ , $i$

Creates a quarter-cylinder. Several CYL4 commands are not allowed. A combination with BLOCK and CYL2 commands is not allowed. Parameter $ε$ adds an imperfection to the circular tube shape. Parameter $i$ defines the mode of imperfection ( $i = 2, 3, \dots$ ). The imperfection is set to be maximal in the middle of the tube and to be zero at its ends, which stay perfectly circular. The imperfection $ε = 0.01$ means $1 %$ of the diameter in the tube’s middle. The formulae used for imperfection calculation are described in Stembera2013.

Parameter	Description
$l$	cylinder length
$R_{0}$	cylinder inner radius
$h_{0}$	cylinder thickness
$ε$	imperfection
$i$	order of imperfection (default value is 2)

CYL4, l, R0, h0, ε, i

CYL4, $l$ , $R_{0}$ , $h_{0}$ , $ε$ , $i$