Calculate damping coefficient of dashpot from physical dimensions

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Discussion Overview

The discussion revolves around calculating the damping coefficient of a linear viscous dashpot or damper based on the physical dimensions of the piston and the dynamic viscosity of the damping fluid. Participants seek equations or methodologies for this calculation rather than empirical data.

Discussion Character

  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant, JJ, is looking for the specific equation used to calculate the damping coefficient from the physical dimensions of the piston and the viscosity of the fluid.
  • Another participant suggests that the general equation of motion for a single degree-of-freedom system with viscous damping may be helpful, providing a link to a resource.
  • JJ clarifies that they are seeking an equation that directly relates the physical dimensions and fluid properties to the damping coefficient, rather than performance data.
  • A later reply suggests viewing the source of a linked webpage to find the equation used in the calculator provided by JJ.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the specific equation needed, and multiple approaches to finding the damping coefficient are discussed without resolution.

Contextual Notes

Participants have not specified the assumptions or conditions under which the equations might apply, nor have they detailed the dependencies on definitions or specific parameters of the damping system.

JimmyJimmy
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Hi all,

I am trying to calculate the damping coefficient of a linear viscous dashpot/damper given the dimensions of the piston, and the dynamic viscosity of the damping fluid.

I have found this calculator, but does anyone know the equation that it uses?

http://www.tribology-abc.com/calculators/damper.htm


Many thanks,
JJ.
 
Engineering news on Phys.org
Thanks, I was more looking for an equation(s) which allows me to input the physical dimensions of the piston and the viscous fluid in order to calculate the damping coefficient, rather than recorded data of the damper performance.
 
View the source of the web page and you should be able to see the equation used.
 

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