scope:

Application

Direct strength and hydrodynamic analyses are to be based on the operational profile for the craft. This profile is normally based on Ch.1 Sec.2 [2.2], which determines the relationship between maximum allowed speed and significant wave height for a given design vertical acceleration. The operational profile may also be based on hydrodynamic analysis or model tests.

Sec.1 to Sec.4 apply to high speed and light craft designs of any material defined in DNVGL-RU-SHIP Pt.2 apply to craft of steel or aluminium only, i.e. for craft classified in accordance with Ch.2 and Ch.3. Craft of fibre composites and sandwich constructions are not explicitly mentioned in this chapter, but the principles described are applicable for such craft. The acceptance criteria are to be adjusted accordingly.

Calculated global design wave loads may, if calculated and documented in accordance with the requirements in Sec.2, be used as an alternative to the global design wave loads as given in Ch.1 Sec.3. The Society reserves the right to evaluate received documentation and determine the design load level in each case.

The calculations specified in this chapter are to be carried out by computer programmes recognised by the Society. Recognised programmes are considered as all programmes where reliable results have been demonstrated to the satisfaction of the Society.

Wave load analysis programmes are to be documented in accordance with [2.2].