Translational Damper (Advanced)

Linear damping in mechanical translational systems.

translational damper advanced

Description

Unit Translational Damper (Advanced) represents a linear mechanical progressive viscous dampener. From the start of the simulation, the block uses a nominal damping coefficient. The linear mechanical progressive viscous damper is described by the following equations:

where

- is the force transmitted through the damper;
- damping coefficient (viscous friction);
- relative velocity;
- absolute velocities of the ports R and C respectively.

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

Thermal model

You can model the effects of heat flow and temperature change by enabling the optional heat port H. To use the H thermal port, tick the checkbox for the Enable thermal port parameters.

Enabling thermal modelling opens the Thermal mass parameters and the Initial Targets section.

Ports

Conserving

# R — mechanical port
translational mechanics

Details

Mechanical progressive port, corresponds to the damper rod.

Program usage name

rod_flange

# C — mechanical port
translational mechanics

Details

Mechanical progressive port, corresponds to the damper housing.

Program usage name

case_flange

# H — heat flux
`heat

Details

A non-directional port associated with heat flow.

Non-directional thermal port associated with heat flux. The heat flux affects the damper temperature and therefore the power transfer efficiency.

Dependencies

To use this port, select the Enable thermal port checkbox for the Enable thermal port parameters.

Program usage name

thermal_port

Parameters

Main

# Damping coefficient — damping factor
kg/s | N*s/m | N/(m/s) | lbf/(ft/s) | lbf/(in/s)

Details

Damping coefficient caused by viscous friction.

Units	`kg/s` \| `N*s/m` \| `N/(m/s)` \| `lbf/(ft/s)` \| `lbf/(in/s)`
Default value	`100.0 N*s/m`
Program usage name	`C`
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 parameters.

Default value	`false (switched off)`
Program usage name	`has_thermal_port`
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.

Units	`J/K` \| `kJ/K`
Default value	`50.0 kJ/K`
Program usage name	`thermal_mass`
Evaluatable	Yes