WOLFRAM SYSTEMMODELER

SpringDamperSeries

Linear spring and linear damper in series connection

Wolfram Language

In[1]:=
SystemModel["Modelica.Mechanics.MultiBody.Forces.SpringDamperSeries"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Linear spring and linear damper in series connection acting as line force between frame_a and frame_b:

  frame_a --> damper ----> spring --> frame_b
          |              |
          |-- s_damper --|  (s_damper is the state variable of this system)

A force f is exerted on the origin of frame_b and with opposite sign on the origin of frame_a along the line from the origin of frame_a to the origin of frame_b according to the equations:

   f = c*(s - s_unstretched - s_damper);
   f = d*der(s_damper);

where "c", "s_unstretched" and "d" are parameters, "s" is the distance between the origin of frame_a and the origin of frame_b. "s_damper" is the length of the damper (= an internal state of this force element) and der(s_damper) is the time derivative of s_damper.

Parameters (12)

s_small

Value: 1e-10

Type: Distance (m)

Description: Prevent zero-division if distance between frame_a and frame_b is zero

fixedRotationAtFrame_a

Value: false

Type: Boolean

Description: =true, if rotation frame_a.R is fixed (to directly connect line forces)

fixedRotationAtFrame_b

Value: false

Type: Boolean

Description: =true, if rotation frame_b.R is fixed (to directly connect line forces)

useHeatPort

Value: false

Type: Boolean

Description: =true, if heatPort is enabled

T

Value: 293.15

Type: Temperature (K)

Description: Fixed device temperature if useHeatPort = false

animation

Value: true

Type: Boolean

Description: = true, if animation shall be enabled

c

Value:

Type: TranslationalSpringConstant (N/m)

Description: Spring constant

s_unstretched

Value: 0

Type: Length (m)

Description: Unstretched spring length

d

Value: 0

Type: TranslationalDampingConstant (N·s/m)

Description: Damping constant

s_damper_start

Value: 0

Type: Length (m)

Description: Initial length of damper

length_a

Value: world.defaultForceLength

Type: Distance (m)

Description: Length of damper cylinder at frame_a side

numberOfWindings

Value: 5

Type: Integer

Description: Number of spring windings

Inputs (8)

diameter_a

Default Value: world.defaultForceWidth

Type: Diameter (m)

Description: Diameter of damper cylinder at frame_a side

diameter_b

Default Value: 0.6 * diameter_a

Type: Diameter (m)

Description: Diameter of damper cylinder at damper-spring side

color_a

Default Value: {100, 100, 100}

Type: Color

Description: Color of damper cylinder at frame_a

color_b

Default Value: {155, 155, 155}

Type: Color

Description: Color of damper cylinder at damper-spring frame

specularCoefficient

Default Value: world.defaultSpecularCoefficient

Type: SpecularCoefficient

Description: Reflection of ambient light (= 0: light is completely absorbed)

width

Default Value: world.defaultForceWidth

Type: Distance (m)

Description: Width of spring

coilWidth

Default Value: width / 10

Type: Distance (m)

Description: Width of spring coil

color

Default Value: Modelica.Mechanics.MultiBody.Types.Defaults.SpringColor

Type: Color

Description: Color of spring

Connectors (3)

frame_a

Type: Frame_a

Description: Coordinate system a fixed to the component with one cut-force and cut-torque

frame_b

Type: Frame_b

Description: Coordinate system b fixed to the component with one cut-force and cut-torque

heatPort

Type: HeatPort_a

Description: Optional port to which dissipated losses are transported in form of heat

Components (4)

world

Type: World

shape_a

Type: Shape

shape_b

Type: Shape

shape

Type: Shape

Used in Examples (1)

HeatLosses

Modelica.Mechanics.MultiBody.Examples.Elementary

Demonstrate the modeling of heat losses