Engee documentation

Rotational Damper

Viscous damper in mechanical rotational systems.

blockType: AcausalFoundation.Mechanical.Rotational.Elements.Damper

rotational damper

Path in the library:

/Physical Modeling/Fundamental/Mechanical/Rotational/Elements/Rotational Damper

Description

Block Rotational Damper It is an ideal mechanical rotational viscous damper described by the following equations:



where

  • — the torque transmitted through the damper;

  • — coefficient of damping (viscous friction);

  • — relative angular velocity;

  • — absolute angular velocities at ports R and C, respectively.

The positive direction of the block is from port R to port C. This means that the torque is positive if it acts in the direction from R to C.

Variables

Use the parameter group Initial Targets to set the priority and initial target values for the block parameter variables before modeling. For more information, see Configuring physical blocks using target values.

Ports

Conserving

# R — shaft
rotational mechanics

Details

Mechanical rotary port, corresponds to the damper shaft.

Program usage name

rod_flange

# C — body
rotational mechanics

Details

Mechanical rotary port, corresponds to the damper body.

Program usage name

case_flange

Parameters

Parameters

# Damping coefficient — damping coefficient
N*m/(rad/s) | ft*lbf/(rad/s)

Details

The coefficient of damping caused by viscous friction.

Units

N*m/(rad/s) | ft*lbf/(rad/s)
Default value

0.001 N*m/(rad/s)
Program usage name

C
Evaluatable

Yes

Examples