Research On Load Model Test Of Full-Skirted Air Cushion Vehicle

A full skirted air cushion vehicle is a type of high-performance ship.Its main feature is that there is an apron around the hull.Air is injected into the bottom of the ship by a fan to form an air cushion.The support of the air cushion enables the hull to travel at high speeds off the water during sailing.Therefore,the full skirted air cushion vehicle hovercraft has the ability to sail on water and on land.And because of its excellent high-speed and amphibious properties,the full skirted air cushion vehicle is widely used in the field of military and civilian ships.However,it is also because of the particularity of its sailing state and structural form that the full skirted air cushion vehicle is different from conventional ships on many aspects.Due to the special structures and systems such as aprons,airbags,and air cushions,the motion patterns and load response of full skirted air cushion vehicle in waves are more complicated than that of conventional ships.At the same time,when the full skirted air cushion vehicle's hull structure is inflated in the state of cushioning,gas-tightness and water-tightness are more severe than that of conventional ships.Due to its complex structure and high speed properties,full skirted air cushion vehicle also has strict restrictions on its own weight and the structural strength must meet the requirements.At present,there is no unified specification containing the corresponding descriptions and requirements for the structural design of the full skirted air cushion vehicle,including key issues such as how to determine the design load in structural design.Research on load model experiment of full skirted air cushion vehicle is even scarcer.In this paper,the research on the motion pattern,air pressure and wave load is conducted based on the model experiment.Main contents are as follows:(1)Researches on the model experiment method of full skirted air cushion vehicle are conducted,including model basic layout design,model structure design,load measurement beam design,cushioning performance matching design,wave load and blast load test method and test result data processing methods.The research on the similarity matching is well completed,and the load model test technology of the full lift hovercraft is improved(2)Load tests on the full skirted air cushion vehicle model under different operating conditions,different wave directions,different wave heights,and different speeds are conducted.The test data is analyzed to study the motion laws and load response characteristics of the full skirted air cushion vehicle under various conditions.It provides the research basis for the load prediction technology of the hovercraft(3)This paper studies the prediction of wave load of the air cushion vehicle with full lift,and determines the design load value under the lift condition.On this basis,the structural strength of the target vehicle under the lift condition is evaluated,which provides technical support for the structural strength evaluation of the air cushion vehicle with full lift.