Researching the Influence of Preload on Vibration Characteristics in the Ballistic Recorder Vibration Damping System

Table 2

Polyurethane elastomer material model and parameters.

Material	Polyurethane elastomers
A (MPa)	4.04389
B (MPa)	38.73164
C	0.50641
m	0.134875
n	0.0
(K)	294
(K)	445
ρ (g/cm^3)	1.1
(m/s)	4695
S (m/s)	1.147
(GPa/K)	1256
Γ	2.04