Aircraft Under Floor Structure

Design analysis and optimization of fuselage floor beam.

Aircraft under floor structure.

Ideally wood used in aircraft structures should have a moisture content between 10 and 12 percent. Structural elements such as pyramid frustums and reinforcements are arranged on the beams. The construction of aircraft fuselages evolved from the early wood truss structural arrangements to monocoque shell structures to the current semi monocoque shell structures. Airplane airplane materials and construction.

The optimized floor beam model is then statically analyzed to find the maximum stress von mises stress maximum von mises stress is below the allowable or yield stress 200mpa and hence the designed optimized cfrp. Simulation of helicopter under floor structure impact on water article in international journal of crashworthiness 6 3 425 443 january 2001 with 43 reads how we measure reads. A subfloor structure of an aircraft airframe particularly of a helicopter includes longitudinal beams and crossbeams that intersect each other and are interconnected to form a grid that is fixedly attached to the floor and the bottom skin of the aircraft fuselage. Megson in aircraft structures for engineering students fifth edition 2013.

As an undergraduate studying aerospace engineering i have to say this blog is a great resource for gaining extra history and. When these loads are caused by aerodynamic forces which themselves depend on the geometry of the structure and the orientation of the various structural components to the. Aircraft structures being extremely flexible are prone to distortion under load. For reasons of availability low weight and prior manufacturing experience most early aircraft were of wood and fabric construction.

I am going to do an intensive research on load transfer structure using aircraft structure from engineering book and i am going to explain. Wood is also subject to attack by fungus minute plants that grow and feed on wood cells when the wood s moisture content rises above 20 percent. Wood structures are made strong enough to offset this loss but the extra beef means a weight penalty. The aluminium structure of the aircraft is used as a ground path for electrical devices.

At the lower speeds then obtainable streamlining was not a primary consideration and many wires struts braces and other devices were used to provide the necessary structural strength. In this construction method strength and rigidity are obtained by joining tubing steel or aluminum to produce a series of triangular shapes called trusses. If the primary structure fails the aircraft won t be capable of flying anymore. The major structural components refer to the primary structure of an aircraft.