PipeLay > Software Components & Operation > Defining a Vessel > Vessel Subcomponents > Tensioner

tensioner_component

Input	Description
Type:	This drop-down list allows you to select whether the tensioner is Linear or Nonlinear. The default is Nonlinear.
Coefficient Type:	This drop-down list allows you to specify whether the damping coefficient for a tensioner is Constant or Active. The default is Constant. This input is only enabled if you select Linear from the Type drop-down list.
Damper	Click on this button to display a dialog that allows you to enter the damping coefficient properties of the tensioner. The dialog that is displayed depends on the option that you selected in the Coefficient Type drop-down list. See the ‘Tensioner Damper – Constant Dialog’ and ‘Tensioner Damper – Active Dialog’ sections for more information. This button is only available if you select Linear from the Type drop down list.
Characteristic Curve:	Click on the Characteristic Curve button to display the Tensioner Characteristic Curve dialog. See the ‘Tensioner Characteristic Curve Dialog’ section below for more information. This button is only available if you select Nonlinear from the Type drop-down list.
Tensioner Support:	A drop-down list that allows you to select a Support component from all those currently defined in the project. A tensioner may optionally be used in conjunction with another support type. For example, a zero-gap O-support could be combined with a tensioner on a vessel in order to model the lateral restraint provided by the hydraulic tracks.

Tensioner Damper - Constant dialog

tension_damper_constant

Input

Description

Damping Coefficient:

A constant damping coefficient for the linear tensioner. This must be a positive value.

Units: [kN.s/m] or [kips.s/ft]

tension_damper_active

Input	Description
Damping Coefficient:	An initial damping coefficient for the linear tensioner. This must be a positive non-zero value. The default is 100000 kN.s/m metric or 6850 kips.s/ft imperial. Units: [kN.s/m] or [kips.s/ft]
Maximum Tension Limit	The allowed maximum dynamic increase in tension, expressed as a percentage of the static value. This must be a positive value. The default is +10%. Units: [%]
Minimum Tension Limit	The allowed maximum dynamic decrease in tension, expressed as a percentage of the static value. This must be a negative value. The default is -10%. Units: [%]
Tension Tolerance	The margin by which the tensioner tension is allowed to fall inside the maximum/minimum limits when the active damping coefficient is being adjusted. This is a percentage value of the static tension and it must be positive. The default is 1%. Units: [%]

tensioner_characteristic_curve

Input

Description

Normalised Tension:

Normalised tension defining a point on the tension characteristic curve.

Displacement:

Corresponding displacement value.

Units: [m] or [ft]