Design of a Submarine Vehicle for Higher Natural Frequency Using U Index Theory Approach

Table 1

Material properties of the major parts of the submarine vehicle.

Component	Material	Elastic modulus (MPa)	Poison’s ratio	Thickness (mm)	Mass (kg)
Vehicle body	Aluminum	70,000	0.33	—	30
Vertical part of suspension (original)				20	5.23
Horizontal part of suspension (original)				20	3.57
Horizontal part of suspension (modified)				30	5.35