Translational Elasto Gap - MapleSim Help

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Translational Elasto Gap

1D translational spring damper combination with gap

 

Description

Equations

Variables

Connections

Parameters

Modelica Standard Library

Description

The Translational Elasto Gap (or Elasto Gap) component models a Spring Damper that can lift-off.

When the distance between the flanges is greater than the relaxed spring length, no force is exerted. Outside of this region, contact is present and the contact force is basically computed with a linear spring/damper characteristic. The parameter n can be used to model a nonlinear spring force.

Equations

contact&equals;srel<srel0

srel&equals;sbsa

vrel&equals;s&period;rel

f&equals;fc&plus;fd&equals;fa&equals;fb

fc&equals;{csrelsrel0ncontact0otherwise

fd&equals;{0¬contactfcfd2<fcfcfc<fd2fd2otherwise

fd2&equals;{dvrelcontact0otherwise

lossPower&equals;fdvrel

Variables

Name

Units

Description

Modelica ID

f

N

Forces between flanges

f

fc

N

Spring force

fc

fd

N

Linear damping force limited by spring force

fd

fd2

N

Linear damping force

fd2

fx

N

Force applied to flangex&comma;xa&comma;b

flange_x.f

srel

m

Relative distance between flanges

s_rel

sx

m

Absolute position of flangex&comma;xa&comma;b

flange_x.s

vrel

ms

Relative velocity between flanges

v_rel

lossPower

W

Loss power leaving component via heatPort

lossPower

contact

 

Boolean variable; true when springs exerts force

contact

Connections

Name

Description

Modelica ID

flangea

Left flange of compliant 1-dim. translational component

flange_a

flangeb

Right flange of compliant 1-dim. translational component

flange_b

heatPort

Optional heat port

heatPort

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

c

1

Nm

Spring constant

c

d

1

Nsm

Damping constant

d

srel0

0

m

Unstretched spring length

s_rel0

n

1

1

Exponent of spring force

n

Use Heat Port

false

 

True (checked) means heat port is enabled

useHeatPort

Advanced Parameters

Name

Default

Units

Description

Modelica ID

snominal

1·10−4

m

Nominal value of srel

s_nominal

State Select

prefer

 

Prioritize srel and vrel as states

stateSelect

Modelica Standard Library

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

See Also

1-D Mechanical Overview

Translational Springs and Dampers