Annex 1 
41 
3) The bedding conditions shall be applied to the foundation elements at least as elastic springs 
(dynamic bedding module). Clamping at the level of the top edge of the uppermost weight-bearing 
ground layer is permitted as an alternative, because it leads to an increase in the overall rigidity of 
the offshore wind farm and therefore to conservative results. 
4) Grouting may be considered as a rigid connection or a linear-elastic material. 
5) The calculations should be performed with the model of an accident assessment ship. It is possible 
to use a single-hulled tanker with 160,000 tdw. If it is possible to establish that a ship type of this 
size cannot reach the wind farm (e.g. due to inadequate water depth) then a different ship can be 
found as the accident assessment ship and used. Data on shipping movements is required for this. 
This shall be provided by the BSH. 
6) The calculation shall assume a ship drifting sideways at 2 m/s. At the moment of collision, the ship 
does not have its own propulsion, longitudinal speed is 0 m/s. 
If a simplified process (yield hinge method, etc.) is used, the energy absorbed from the ship's structure 
shall be used for calculating the degree of damage to the ship and therefore the (environmental) threat. 
The calculated damage scenarios shall be incorporated in the risk analysis. The damage shall be evalu 
ated according to [561 (see chapters 6 and 8) of the relevant regulations issued by GL, DNV, IMO, etc. 
If the substructure has been demonstrated as „collision friendly“ at another point, it is possible to make 
reference to this fact providing assurance is given that the general conditions used there are of an equi 
valent or greater degree of severity to those of the structure requiring certification or of these require 
ments.