Multi body Dynamics of Plston Assembly for various Wrist Pin Offset conditions

Aim:

MBD Simulation of Piston Assembly to find out linear displacement of piston head based on various Wrist Pin Offset conditions.

CAD Model:

Front View:

Side View:

Isometric View:

Simulation Setup:

• First the Wrist pin offset is set to 0 or 10mm positive or 10mm Negative.
• Then the motor revolution is setup to 2000 rpm in clockwise direction.
• After that the contacts are defined.
• The no of frames per second is changed to 12000 fps and precision is set.
• And finally to get the linear displacement plot, the plot is setup and the simulation us run.

Results:

• As we can see from the below graph, for 0 mm the maximum linear displacement is acheived at around 300 and time taken to complete a cycle is more when compared to the other two conditions.
• The linear displacement is more when the wrist pin offset in the positive direction when compared to the negative direction.
• The time taken to complete a cycle is reduced due to the offset irrespective of the direction of offset.