Rotational Damper (Advanced)
Linear damping in rotating systems.
Description
The Rotational Damper (Advanced) unit is a linear mechanical rotational viscous damper described by the following equations:
where
-
- is the torque transmitted through the damper;
-
- is the damping coefficient (viscous friction);
-
- relative angular velocity;
-
- absolute angular velocities at ports R and C respectively.
The positive block direction is from port R to port C. This means that the torque is positive if it acts in the direction from R to C.
Ports
Conserving
#
R
—
mechanical port
`rotational mechanics
Details
Mechanical rotational port, corresponds to the damper rod.
Program usage name |
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#
C
—
mechanical port
`rotational mechanics
Details
Mechanical rotational port, corresponds to the damper housing.
Program usage name |
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#
H
—
heat flux
`heat
Details
A non-directional port associated with heat flow.
The heat port allows modelling the heat flow between the unit and the connected network.
Dependencies
To use this port, select the Enable thermal port check box.
Program usage name |
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Parameters
Main
#
Damping coefficient —
damping factor
N*m/(rad/s)
| ft*lbf/(rad/s)
Details
The torque that reduces oscillations due to viscous friction that the block applies if no start event occurs. Specify a value that is greater than or equal to zero.
Values |
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Default value |
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Program usage name |
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Evaluatable |
Yes |
Thermal Port
# Enable thermal port — switching on the heat port
Details
Checking this box displays the H heat port, which allows you to simulate the effects of heat flow and temperature changes. Checking this box also enables the Thermal mass and Temperature parameters.
Default value |
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Program usage name |
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Evaluatable |
No |
#
Thermal mass —
heat capacity
J/K
| kJ/K
Details
The heat energy required to change the temperature of a component by one degree. Heat capacity is the ability of the damper to absorb and retain heat energy.
Dependencies
To use this parameter, select the Enable thermal port checkbox.
Values |
|
Default value |
|
Program usage name |
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Evaluatable |
Yes |