AVT's Ondeck helicopter-ship dynamic simulation analysis helps to mitigate the risk of operating helicopters from ships.
This is achieved by utilising a specifically developed advanced simulation tool (Ondeck) that can accurately model the dynamic interaction between a helicopter and ship to establish safe ship motion operating limits (SHOL's) and provide operational guidance. The Ondeck model was initially developed by the Australian Defence Science and Technology Organisation (DSTO).
For over 10 years AVT has provided analysis services using the Ondeck software and has assisted the Australian Defence Force, as well as other defence forces including the Danish Navy, Swedish Navy and the New Zealand Navy.
Accurate ship motion data is used where available to kinematically drive the ship for a range of sea states, relative wave headsings and ship speeds. Where necessary ship simulation models are developed using ShipmoPC. The non-linear dynamic helicopter model includes accurate representations of the undercarriage and tyres and can model wheel sliding and lift off, interaction with multi-contact surfaces, undercarriage loads, lashing loads, rotor and wind loads as well as the effect of restraint systems like RAST and Decklock.
Analysis can be performed to assess landing loads, airframe clearance, optimise lashing scheme layouts, predict safe ship motion limits and produce undercarriage and airframe load spectrum data for fatigue analysis.
In all 9 helicopter types have been modeled including S70B-2 Seahawk, S70A Black Hawk, SK 50/50A Sea King, MRH-90, ARH Tiger, Squirrel, Lynx Mk90b, SH-2G Seasprite and the CH-47 Chinook.
