Parameters Optimization and Energy Absorption Evaluation of the Steel Ball Friction Energy Absorber

Table 1

Geometric dimension of the energy absorber.

Part name	Parameters	Values (mm)
Cylinder	Inner diameter, Dc	40
	Wall thickness, t	10
	Length, L	320
Piston	Piston diameter, Dp	40
	Piston thickness, d1	19
Ball column	Column height, H	100
	Ball diameter, d0	8
Drill rod	Diameter, dr	19
	Length, Lr	3000
Assembly size	Clearance, c	10
	Piston position, H1	150