Cableizer ®

Diameter over armour bedding

Symbol
$D_{ab}$
Unit
mm
Formulas
$F_{x} D_{shj}+2\left(t_{f}+t_{ab}\right)$multi-core cables type SS
$D_{sh}+2t_{ab}$otherwise
Related
$D_{sh}$
Diameter over sheath [mm]
$D_{shj}$
Diameter over sheath jacket [mm]
$F_{x}$
Geometrical distance factor for multi-core cables
$t_{ab}$
Thickness armour bedding [mm]
$t_{f}$
Thickness of filler/belt insulation [mm]
Used in
$A_{ab}$
Cross-sectional area armour bedding [mm$^2$]
$A_{ar}$
Cross-sectional area armour [mm$^2$]
$C_{sa}$
Capacitance shield - armour [F/m]
$C_{sg}$
Capacitance shield - ground [F/m]
$D_{ar}$
Diameter over armour [mm]
$d_{ar}$
Mean diameter armour [mm]
$J_{ab}$
Moment of inertia (bending) armour bedding [mm$^4$]
$p_{ab}$
Apportioning factor armour bedding
$r_{osc}$
Radius over capacitive insulation layers [mm]
$r_{z4}$
Radius armour (inner) [m]
$\rho_{ar}$
Specific electrical resistivity armour material [$\Omega$.m]
$S_{ar}$
Circumference armour [mm]
$T_{ab}$
Thermal resistance armour bedding [K.m/W]
$t_{sha}$
Total thickness between separate sheath and armour [mm]