Designs against Collision and Grounding
Based on the study of the deformation mode, energy absorption, and the relationship between
collision force and penetration of the ship’s side and bottom structure in ship collision and
End
Grounding
Total distortion
energy
resistance
|En+1-En|<
Plating stiffener
energy with P
Girder energy
Floor energy
Bottom plate
Girder stiffener
energy
Floor stiffener
energy
Plating stiffener
energy without P
Figure 23.8
The procedure of calculation of distortion energy and grounding resistance.
470 Chapter 23
grounding accidents, researchers are putting more effort into developing new designs against
collision and grounding. The structural crashworthiness of struck ships must be improved,
but reducing striking-ship stiffness is also an option. The degree of damage varies according
to vessel positions, and the relative stiffness between struck and striking ships.