Damper Test Machine (DTM)

Burke Porter offers a variety of Damper Test Machines that are designed to test shock absorbers for force versus displacement, force velocity hysteresis, and peak force at peak velocity testing. During testing, a servohydraulic actuator mounted to a cross-head lift provides loading of the test unit.

The Damper Test Software supplied with the machine generates graphics for the following:

Force vs. Displacement (FD) Loop
This graph shows measured force versus measured displacement at each velocity. The area of the FD loop represents the energy absorbed or work done by the shock absorber.

Force vs. Velocity Loop
This diagram shows the measured force at each velocity for a given number of cycles. The force versus velocity loop diagram is the nominal gage of hysteresis in the shock absorber since force is proportional to velocity.

Peak Force vs. Velocity (PV) Curve
This graph shows the damping characteristics of the shock absorber. In particular, the graph shows the "knee" where the gradient of the graph changes to give relatively small increases in force as velocity increases.

Burke E. Porter Machinery, 730 Plymouth Rd. NE, Grand Rapids, MI 49505. Tel: 616-459-9531; Fax: 616-459-1032.