Sagging Span
Web span component including sag due to gravity
Description
Usage
Connections
Parameters
Summary Variables
The Sagging Span component models a span in which the effect of gravity is considered.
This components uses a discretization approach to account for the distributed mass of the span. Due to the added model complexity, the Sagging Span component should only be used where the span sag is significant.
The Sagging Span component must be used only as a connector between rollers, drums, a source, or a sink, from the Web Handling Library.
Name
Modelica ID
framea
Left web 3-D connection point
frame_a
frameb
Right web 3-D connection point
frame_b
weba
Entrance web transfer information port
web_a
webb
Exit web transfer information port
web_b
Web Properties
Default
Units
Use Default Properties (WP1)
true
When checked (true), web properties are defined by the closest Web Properties block found
useDefault
WP1
Name of the record containing the web properties (enabled when Use default properties = false)
wp
d0
1
N⋅s2m4
Quadratic damping per unit area applied to interior nodes to reduce lateral vibration.
d_0
Web Sensor
Use sensor
false
When checked (true), two signal outputs are enabled for the tension in the span and the material transfer speed
useSensor
Velocity output unit
ms
Selects units of the velocity output; enabled when Use Sensor=true
toUnitV
Force output unit
N
Selects units of the force output; enabled when Use Sensor=true
toUnitF
Settings
n
5
Number of interior nodes (n+1 segments)
Summary variables provide easy access to quantities that maybe important in simulations to measure performance and other key metrics.
summary_Tension
[1]
Uniform tension in the web span
summary_Length
Length of the web span
summary_MaxSag
Maximum sag of the web span
summary_Stress
Stress of the web span
summary_Strain
Strain of the web span
[1] Units are set in the corresponding Web Properties block (under the Summary variables section).
See Also
Web Handling Library
Webs
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